<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kullberg, A.T.G.</style></author><author><style face="normal" font="default" size="100%">Lopes, A.A.S.</style></author><author><style face="normal" font="default" size="100%">Veiga, J.P.B.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Crystal growth in zinc borosilicate glasses</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Crystal Growth</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979663984&amp;doi=10.1016%2fj.jcrysgro.2016.07.022&amp;partnerID=40&amp;md5=52e08ac03a5bd06f970d730c5ae2192d</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">457</style></volume><pages><style face="normal" font="default" size="100%">239-243</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Glass samples with a molar composition (64+x)ZnO–(16−x)B2O3–20SiO2, where x=0 or 1, were successfully synthesized using a melt-quenching technique. Based on differential thermal analysis data, the produced glass samples were submitted to controlled heat-treatments at selected temperatures (610, 615 and 620 °C) during various times ranging from 8 to 30 h. The crystallization of willemite (Zn2SiO4) within the glass matrix was confirmed by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). Under specific heat-treatment conditions, transparent nanocomposite glass-ceramics were obtained, as confirmed by UV–vis spectroscopy. The influence of temperature, holding time and glass composition on crystal growth was investigated. The mean crystallite size was determined by image analysis on SEM micrographs. The results indicated an increase on the crystallite size and density with time and temperature. The change of crystallite size with time for the heat-treatments at 615 and 620 °C depended on the glass composition. Under fixed heat-treatment conditions, the crystallite density was comparatively higher for the glass composition with higher ZnO content. © 2016 Elsevier B.V.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Barbosa, A.R.J.a</style></author><author><style face="normal" font="default" size="100%">Lopes, A.A.S.a</style></author><author><style face="normal" font="default" size="100%">Sequeira, S.I.H.a</style></author><author><style face="normal" font="default" size="100%">Oliveira, J.P.a</style></author><author><style face="normal" font="default" size="100%">Davarpanah, A.b</style></author><author><style face="normal" font="default" size="100%">Mohseni, F.b</style></author><author><style face="normal" font="default" size="100%">Amaral, V.S.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of processing conditions on the properties of recycled cathode ray tube glass foams</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Porous Materials</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84976430954&amp;doi=10.1007%2fs10934-016-0227-7&amp;partnerID=40&amp;md5=1d036e961b9aee91b9149dbe6d043c86</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">6</style></number><volume><style face="normal" font="default" size="100%">23</style></volume><pages><style face="normal" font="default" size="100%">1663-1669</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Cathode ray tube glass waste was used to produce glass foams by a powder sintering route. The glass waste powder was mixed with small amounts (5 and 8 wt%) of coal fly ash, which acted as foaming agent, and the compacts of the mixed powders were heated at different sintering temperatures in the range 600–800 °C for various dwell times (30–120 min). The effect of the different processing conditions on the microstructural characteristics (porosity, pore size and pore size distribution), mechanical resistance and thermal conductivity of the produced foams was investigated. The volume of pores tended to increase with sintering temperature and time, and glass foams (with a porosity higher than 50 %) were only achieved after sintering at 750 °C. The average pore size increased with sintering temperature and dwell time, and pore growth was particularly accentuated at 800 °C, where coalescence of the pores occurred, with a consequent decrease in compressive strength. Selected combinations of the sintering temperature, dwell time and foaming agent led to glass foams with a satisfactory microstructural homogeneity, which exhibited mechanical strength and thermal conductivity values similar to commercial foams used as thermal insulating materials. © 2016, Springer Science+Business Media New York.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kullberg, A.T.G.</style></author><author><style face="normal" font="default" size="100%">Lopes, A.A.S.</style></author><author><style face="normal" font="default" size="100%">Veiga, J.P.B.</style></author><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Formation and crystallization of zinc borosilicate glasses: Influence of the ZnO/B2O3 ratio</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Non-Crystalline Solids</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84962668494&amp;doi=10.1016%2fj.jnoncrysol.2016.03.022&amp;partnerID=40&amp;md5=572320330addbb6cdc9d64f8b0944b60</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">441</style></volume><pages><style face="normal" font="default" size="100%">79-85</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Different glasses based on the ZnO-B2O3-SiO2 system, with a ZnO content ≥ 60 mol% and a fixed SiO2 content (20 mol%), were synthesised using a melt-quenching method. Glass samples with zinc oxide concentrations as high as 65 mol% were prepared successfully without deteriorating the glass-forming ability. The glass samples were submitted to controlled heat-treatments, and the effect of the ZnO/B2O3 molar ratio on the formation of crystalline phases within the glass matrix was investigated by means of differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). DTA results indicated that the glass transition and the onset crystallization temperatures of the studied glasses tended to increase with the increment on the ZnO/B2O3 ratio. XRD data showed that the zinc binary crystalline phases, willemite (Zn2SiO4), a zinc orthosilicate, and zinc borate (Zn3B2O6) could be present in the crystallized glasses, depending on the heat-treatment conditions. The formation of willemite was promoted by an increasing ZnO/B2O3 ratio. Microstructural observations performed by SEM indicated that under controlled experimental parameters (glass composition, heat-treatment temperature and time) the precipitation of nanocrystals within the glass matrix can be achieved, resulting in transparent and translucent willemite glass-ceramics. © 2016 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 3&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Nico, C.a</style></author><author><style face="normal" font="default" size="100%">Fernandes, R.a</style></author><author><style face="normal" font="default" size="100%">Graça, M.P.F.a</style></author><author><style face="normal" font="default" size="100%">Elisa, M.a</style></author><author><style face="normal" font="default" size="100%">Sava, B.A.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.c</style></author><author><style face="normal" font="default" size="100%">Rino, L.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, T.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Erratum: Eu3+ luminescence in aluminophosphate glasses (Journal of Luminescence (2014) 145 (582-587))</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Luminescence</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2015</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84939939056&amp;doi=10.1016%2fj.jlumin.2015.02.007&amp;partnerID=40&amp;md5=5814e35f21ab4d8b172477f2bd3484a7</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">161</style></volume><pages><style face="normal" font="default" size="100%">465</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">n/a</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Barbosa, A.R.a</style></author><author><style face="normal" font="default" size="100%">Lopes, A.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.a</style></author><author><style face="normal" font="default" size="100%">Castro, F.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Use of different inorganic solid wastes to produce glass foams</style></title><secondary-title><style face="normal" font="default" size="100%">Wastes: Solutions, Treatments and Opportunities - Selected Papers from the 3rd Edition of the International Conference on Wastes: Solutions, Treatments and Opportunities, 2015</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2015</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84949747069&amp;partnerID=40&amp;md5=363b4a574afc2cbc1f9eac49d3df382d</style></url></web-urls></urls><pages><style face="normal" font="default" size="100%">25-30</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Cathode Ray Tube (CRT) waste glasses produced from dismantling TV sets were used to prepare glass foams by a simple and economic processing route, consisting of a direct sintering process of mixtures of CRT waste as glass powder with different foaming agents (coal fly ash and limestone quarrying residues). The influence of firing temperature, amount and type of foaming agent on the apparent density, pore size distribution and compressive strength have been studied. The aim of the work was to investigate the possibility to obtain glass foams using exclusively wastes as starting materials, and therefore replacing the conventional raw materials. © 2015 Taylor &amp;amp; Francis Group, London.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Soares, R.S.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author><author><style face="normal" font="default" size="100%">Lopes, A.A.S.a</style></author><author><style face="normal" font="default" size="100%">Lima, M.M.R.A.a</style></author><author><style face="normal" font="default" size="100%">Sava, B.A.b</style></author><author><style face="normal" font="default" size="100%">Elisa, M.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Crystallization and microstructure of Eu3 +-doped lithium aluminophosphate glass</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Non-Crystalline Solids</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904546562&amp;doi=10.1016%2fj.jnoncrysol.2014.06.017&amp;partnerID=40&amp;md5=7530220e52b4a3f08bc815f1395ca62c</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">403</style></volume><pages><style face="normal" font="default" size="100%">9-17</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A transparent Eu3 +-doped lithium aluminophosphate glass was prepared by melt-quenching technique. The thermal behavior of the glass was investigated by differential thermal analysis (DTA), the structure was studied by X-ray diffraction (XRD) and the morphology was observed by optical polarization microscopy and scanning electron microscopy (SEM). The activation energy of glass transition and the activation energy of crystallization and Avrami exponent have been evaluated under non-isothermal conditions from the data obtained by DTA at different heating rates. DTA curves exhibited an endothermic peak associated with the glass transition and two exothermic peaks. The mean value calculated for the activation energy of glass transition was 545 kJ mol- 1. The activation energy of crystallization was   400 kJ mol- 1 for the first exothermic peak and   170 kJ mol- 1 for the second peak. The Avrami exponent was   1 for both peaks indicating surface crystallization. XRD results showed that the main crystalline phase, aluminum metaphosphate, Al(PO3)3, and aluminum phosphate, AlPO4, were formed together with lithium barium phosphate, Li 3Ba(PO3)7, during the first exothermic peak and together with barium pyrophosphate, Ba2P2O7, during the second peak. Morphological study of heat-treated glass samples revealed microstructural features that confirmed a surface crystallization process. © 2014 Elsevier B.V.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lopes, A.A.S.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author><author><style face="normal" font="default" size="100%">Soares, R.S.a</style></author><author><style face="normal" font="default" size="100%">Lima, M.M.R.A.a</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Crystallization kinetics of a barium-zinc borosilicate glass by a non-isothermal method</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Alloys and Compounds</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892761880&amp;doi=10.1016%2fj.jallcom.2013.12.086&amp;partnerID=40&amp;md5=ea0f88c873586127126819fff6730f79</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">591</style></volume><pages><style face="normal" font="default" size="100%">268-274</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The crystallization kinetics of a glass with a molar composition 40BaO-20ZnO-30B2O3-10SiO2 was investigated. The kinetic parameters, activation energy for crystallization (Ec) and Avrami exponent (n), were evaluated under non-isothermal conditions using the results obtained by differential thermal analysis (DTA) performed at different heating rates. DTA curves exhibited two overlapping exothermic peaks associated with the crystallization of the glass. Barium borate (BaB4O 7) was the first crystalline phase to be formed and it was followed by the formation of barium zinc silicate (BaZnSiO4), as identified by XRD. For the first exothermic peak, when the fraction of crystallization (χ) increased from 0.1 to 0.9, the local activation energy (E c(χ)) decreased from 700 to 500 kJ/mol, while for the second exothermic peak, Ec(χ) slightly increased from 490 to 570 kJ/mol. For the range of 0.1 &amp;lt; χ &amp;lt; 0.9, the local Avrami exponent (n(χ)) increased from ∼1 to 1.4 for the first exothermic peak and it decreased from ∼1.7 to 1.4 for the second exothermic peak. Observation by SEM of the microstructure of sintered glass samples revealed that crystallization started at the surface of glass particles, with growth of lamellar crystallites, that together with some quasi-spherical nano-sized crystallites progressed towards the inside of the glass at the highest sintering temperatures. The change of the local activation energy with the fraction of crystallization suggested that a multi-step kinetic reaction took place during sintering and crystallization of the glass. © 2013 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 8&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Soares, R.S.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Silva, R.J.C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Crystallization of lithium disilicate-based multicomponent glasses - Effect of silica/lithia ratio</style></title><secondary-title><style face="normal" font="default" size="100%">Ceramics International</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84922771906&amp;doi=10.1016%2fj.ceramint.2014.08.074&amp;partnerID=40&amp;md5=8d3179afd6694aa720e1155aded942aa</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">1</style></number><volume><style face="normal" font="default" size="100%">41</style></volume><pages><style face="normal" font="default" size="100%">317-324</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Two glass compositions were prepared from the system SiO2-Li2O-K2O-ZrO2-P2O5 with different SiO2/Li2O ratio (2.39 and 3.39) and the crystallization behavior was investigated by differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The crystallization kinetic parameters (activation energy of crystallization and Avrami exponent) were evaluated by different methods from the data obtained by DTA performed at different heating rates. For both glasses, two exothermic peaks were observed in the DTA curves, and the crystallization peak temperatures increased with SiO2/Li2O ratio. XRD analysis revealed that the first peak corresponds to the crystallization of lithium metasilicate (Li2SiO3) and the second to the formation of lithium disilicate (Li2Si2O5). After heating the glasses at a temperature above the second crystallization peak (900 °C), both Li2Si2O5 and Li2SiO3 were found in samples having the lowest SiO2/Li2O ratio, whereas no Li2SiO3 was detected in samples with the highest SiO2/Li2O ratio. For both glasses, the value obtained by different methods for the activation energy of crystallization was in the range of 225-275 kJ mol-1 for the first exothermic peak and in the range of 425-500 kJ mol-1 for the second peak. The estimated Avrami exponent was close to 1 for the first exothermic peak, indicating surface crystallization, and close to 3 for the second exothermic peak, suggesting volume crystallization. This was confirmed by the morphological study made by SEM that showed needle-like crystals in the microstructure of samples with lithium metasilicate and granular crystals in the microstructure of samples having lithium disilicate. © 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Nico, C.a</style></author><author><style face="normal" font="default" size="100%">Fernandes, R.a</style></author><author><style face="normal" font="default" size="100%">Graça, M.P.F.a</style></author><author><style face="normal" font="default" size="100%">Elisa, M.b</style></author><author><style face="normal" font="default" size="100%">Sava, B.A.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.c</style></author><author><style face="normal" font="default" size="100%">Rino, L.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, T.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Eu3+ luminescence in aluminophosphate glasses</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Luminescence</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883856166&amp;doi=10.1016%2fj.jlumin.2013.08.041&amp;partnerID=40&amp;md5=f7cb8ff1f4deba9f9ee18157135eecaf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">145</style></volume><pages><style face="normal" font="default" size="100%">582-587</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;With a 4f6 electronic configuration, europium ions in the trivalent charge state are known to be efficient activators in wide band gap matrices. Embedded in the aluminophosphate (Li2O-BaO-Al 2O3-La2O3-P2O 5) glasses the optically activated Eu3+ ions lead to intense room temperature orange/red luminescence with 16-23 Cd/m2 by using ultraviolet pumping. The as-prepared and heat treated europium doped glasses for temperatures below and above Tg were studied by room temperature Raman spectroscopy, absorption, photoluminescence excitation, temperature dependent and time dependent photoluminescence. When the samples are excited by 325 nm wavelength photons, an enhancement of the red luminescence intensity by ca. one order of magnitude was found to occur for temperatures between 14 K and 350 K, for all the doped glasses. On the other hand, by using resonant excitation on the 5L6 Eu3+ excited state (λexc 390 nm) the ion emission intensity was found to be nearly constant for temperatures up to 500 K. For higher temperatures a steeper decrease of the luminescence intensity occurs due to non-radiative competitive channels described by activation energies of ca. 235 meV and 450 meV by using 325 and 390 nm wavelength photons as excitation, respectively. The lifetime of the 5D0 level in these glasses is ca. 2.93 ms. A discussion of the thermal population and de-excitation mechanisms is performed. © 2013 Elsevier B.V.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 10&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lopes, A.A.S.</style></author><author><style face="normal" font="default" size="100%">Soares, R.S.</style></author><author><style face="normal" font="default" size="100%">Lima, M. M. A.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Glass transition and crystallization kinetics of a barium borosilicate glass by a non-isothermal method</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Applied Physics</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907487463&amp;doi=10.1063%2f1.4863334&amp;partnerID=40&amp;md5=da6cf33632ab320943f8873d70448290</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">4</style></number><volume><style face="normal" font="default" size="100%">115</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The glass transition and crystallization kinetics of a glass with a molar composition 60BaO-30B2O3-10SiO2were investigated by differential scanning calorimetry (DSC) under non-isothermal conditions. DSC curves exhibited an endothermic peak associated with the glass transition and two partially overlapped exothermic peaks associated with the crystallization of the glass. The dependence of the glass transition temperature (Tg) and of the maximum crystallization temperature (Tp) on the heating rate was used to determine the activation energy associated with the glass transition (Eg), the activation energy for crystallization (Ec), and the Avrami exponent (n). X-ray diffraction (XRD) revealed that barium borate (β-BaB2O4) was the first crystalline phase to be formed followed by the formation of barium silicate (Ba5Si8O21). The variations of activation energy for crystallization and of Avrami exponent with the fraction of crystallization (χ) were also examined. When the crystallization fraction (χ) increased from 0.1 to 0.9, the value of local activation energy (Ec(χ)) decreased from 554 to 458 kJ/mol for the first exothermic peak and from 1104 to 831 kJ/mol for the second exothermic peak. The value determined for the Avrami exponent was near 2 indicating a similar one-dimensional crystallization mechanism for both crystalline phases. This was confirmed by the morphological studies performed by scanning electron microscopy (SEM) on glass samples heat-treated at the first and at the second crystallization temperatures. © 2014 AIP Publishing LLC.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 3&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Soares, R.S.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author><author><style face="normal" font="default" size="100%">Lima, M.M.R.A.a</style></author><author><style face="normal" font="default" size="100%">Sava, B.A.b</style></author><author><style face="normal" font="default" size="100%">Elisa, M.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Phase transformation and microstructural evolution after heat treatment of a terbium-doped lithium-aluminum phosphate glass</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Materials Science</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899630119&amp;doi=10.1007%2fs10853-014-8162-y&amp;partnerID=40&amp;md5=9c8373824b7cd9213ad81448f42549c0</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">13</style></number><volume><style face="normal" font="default" size="100%">49</style></volume><pages><style face="normal" font="default" size="100%">4601-4611</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The crystallization kinetics and phase transformation of a transparent Tb3+-doped lithium-aluminum phosphate glass, prepared by melt quenching, were investigated. The energy associated to the glass transition and the crystallization parameters (activation energy for crystallization and Avrami exponent) were evaluated by different methods using the experimental data obtained by differential thermal analysis performed at different heating rates. Using an isoconversional method to determine the change of the activation energy for crystallization with the fraction of crystallization, it was verified that with the increase in the fraction of crystallization from 0.1 to 0.9, the value of the activation energy decreased slightly from  370 to  310 kJ mol -1 and that the Avrami exponent varied from 0.8 to 1, suggesting a surface crystal growth mechanism. Observation of the microstructural evolution of heat-treated glass samples confirmed a surface crystallization process revealing spherulitic crystals constituted mainly by aluminum metaphosphate. © 2014 Springer Science+Business Media New York.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 4&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Braz, L. F. C.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author><author><style face="normal" font="default" size="100%">Veiga, JP</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of phosphogypsum on the clinkerization temperature of portland cement clincker</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870758775&amp;doi=10.4028%2fwww.scientific.net%2fMSF.730-732.94&amp;partnerID=40&amp;md5=953b63a1debd3dc6840a288467ba3232</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">730-732</style></volume><pages><style face="normal" font="default" size="100%">94-99</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Phosphogypsum (PG) is a pollutant residue resulting from the production of phosphoric acid in the phosphated fertilizers industry. About 180 millions of tons of PG are generated worldwide per year, which originates storage problems because of the environmental restrictions and the high costs of storage spaces. Taking into account the mineralizer properties of PG it has been studied a way to valorize this residue as an alternative material in the production of Portland cement clinker. The PG and the raw-materials (limestone, marl, sand and iron oxide) were chemical, mineralogical and thermally characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD) and differential thermal analysis and termogravimetric analysis (DTA/TGA). After milling, the phosphogypsum was mixed with the raw-materials in different amounts up to 10% weight. The raw mixtures were submitted to two types of firing schedules, heating up to 1500°C without any holding time or heating up to 1350°C and holding for 20 minutes. After firing, the clinkers were analyzed by optical microscopy, milled and characterized in terms of chemical and mineralogical compositions. The clinkers were used to produce cement mortar according to NP EN 196-1 standard. The resultant test specimens were mechanically tested at 2 and 28 days according to the same standard. The obtained results show a reduction of about 140°C in the clinkerization temperature, when a raw mixture with 5% phosphogypsum was used. Standard clinkers, without phosphogypsum addition, which were fired at 1500°C, originated test specimens with a compressive strength of 48.1MPa at 28 days. Test specimens produced with clinker containing 5% phosphogypsum present higher compressive strength values at 28 days, being 55.1MPa for clinkers produced at 1500°C, and 49.4 MPa for clinkers produced at 1350°C. © (2013) Trans Tech Publications, Switzerland.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 2&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Nico, C.a</style></author><author><style face="normal" font="default" size="100%">Graça, M.P.F.a</style></author><author><style face="normal" font="default" size="100%">Elisa, M.b</style></author><author><style face="normal" font="default" size="100%">Sava, B.A.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.c</style></author><author><style face="normal" font="default" size="100%">Rino, L.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, T.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effects of ultraviolet excitation on the spectroscopic properties of Sm3+ and Tb3+ doped aluminophosphate glasses</style></title><secondary-title><style face="normal" font="default" size="100%">Optical Materials</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885065549&amp;doi=10.1016%2fj.optmat.2013.06.036&amp;partnerID=40&amp;md5=6ca4f8a495a8c11196f7dea3c6853afc</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">12</style></number><volume><style face="normal" font="default" size="100%">35</style></volume><pages><style face="normal" font="default" size="100%">2382-2388</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Li2O-BaO-Al2O3-La2O 3-P2O5 glasses optically activated with rare earth ions with the 4f5, and 4f8 electronic configuration (Sm3+ and Tb3+, respectively) were analyzed by Raman spectroscopy, absorption, excitation photoluminescence, decay curves and temperature dependent photoluminescence. The spectroscopic characteristics of the as-prepared and heat treated samples at temperatures below and above T g were studied as well as their room temperature photometric properties under ultraviolet excitation. All the doped glasses exhibit typical signatures of the lanthanides in their trivalent charge state. For the samarium doped glass heat treated at 250 C (&amp;lt;Tg) the Sm2+ luminescence was also observed. The analysis of the luminescence efficiency was performed in the interval range of 14 K to room temperature, where the integrated intensity of the luminescence was found to decrease for the Sm 3+ and Tb3+ ions in the studied temperature range. Luminescence decay curves were found to be non-exponential for the 4G5/2 → 6H7/2 and 5D3 → 7F4 transitions of the Sm3+ and Tb3+ ions, respectively. The results strongly suggest the occurrence of energy transfer processes through cross relaxation phenomena, mediated by dipole-dipole interaction in all the studied samples. The decay of the 5D4 → 7F5 emission of the Tb3+ ions was found to be single exponential with a time constant of ∼3.1 ms. Based on the spectroscopic characteristics, models for recombination processes are proposed. The room temperature luminance photometric properties with ultraviolet excitation show that the samarium doped glasses have much lower luminance intensity (around 0.3 Cd/m2) when compared with the 6-7 Cd/m2 observed for the terbium doped ones. © 2013 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 6&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Elisa, M.a</style></author><author><style face="normal" font="default" size="100%">Sava, B.A.a</style></author><author><style face="normal" font="default" size="100%">Vasiliu, I.C.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author><author><style face="normal" font="default" size="100%">Iordanescu, C.R.a</style></author><author><style face="normal" font="default" size="100%">Feraru, I.D.a</style></author><author><style face="normal" font="default" size="100%">Ghervase, L.a</style></author><author><style face="normal" font="default" size="100%">Tanaselia, C.c</style></author><author><style face="normal" font="default" size="100%">Senila, M.c</style></author><author><style face="normal" font="default" size="100%">Abraham, B.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Investigations on optical, structural and thermal properties of phosphate glasses containing terbium ions</style></title><secondary-title><style face="normal" font="default" size="100%">IOP Conference Series: Materials Science and Engineering</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893737403&amp;doi=10.1088%2f1757-899X%2f47%2f1%2f012025&amp;partnerID=40&amp;md5=239a866840940e410c41831094aa443b</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">1</style></number><volume><style face="normal" font="default" size="100%">47</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;{Aluminophosphate glasses belonging to the Li2O-BaO-Al 2O3- La2O3-P2O 5 system doped with Tb3+ were prepared and investigated. Methods as Induced Coupled Plasma-Mass Spectrometry (ICP-MS), Induced Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) and X-ray diffraction (XRD) have been used to establish the elemental composition of these vitreous materials. The influence of the Tb3+ ions on the optical properties of the phosphate glasses has been investigated in relation with the structural characteristics of the vitreous matrix. The optical behavior has been studied by ultra-violet-visible (UV-Vis) spectroscopy, revealing electronic transitions specific for terbium ions. Fluorescence spectroscopy measurements have been performed by excitation in the UV and visible domains (377 nm and 488 nm) which resulted in the most significant fluorescence peaks in the Vis domain (540 and 547 nm). Structural information via vibration modes were provided by Fourier Transform Infrared (FTIR) absorption spectra in the 400-4000 cm-1 range. Absorption peaks specific for the vitreous phosphate matrix were put in evidence as P-O-P symmetrical and asymmetrical stretching vibration modes, P-O-P bend, PO2- symmetrical and asymmetrical stretching vibration modes&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Elisa, M.a</style></author><author><style face="normal" font="default" size="100%">Sava, B.A.a</style></author><author><style face="normal" font="default" size="100%">Vasiliu, I.C.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author><author><style face="normal" font="default" size="100%">Veiga, J.P.B.</style></author><author><style face="normal" font="default" size="100%">Ghervase, L.a</style></author><author><style face="normal" font="default" size="100%">Feraru, I.a</style></author><author><style face="normal" font="default" size="100%">Iordanescu, R.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Optical and structural characterization of samarium and europium-doped phosphate glasses</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Non-Crystalline Solids</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876556357&amp;doi=10.1016%2fj.jnoncrysol.2013.03.024&amp;partnerID=40&amp;md5=3ddd47ecb26f8ddb4f13180a187bf0cb</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">369</style></volume><pages><style face="normal" font="default" size="100%">55-60</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The work deals with optical and structural properties of aluminophosphate glasses from Li2O-BaO-Al2O3-La 2O3-P2O5 system containing Sm 3 + and Eu3 + ions. X-ray fluorescence (XRF) has been used to establish the elemental composition of these materials. The influence of Sm3 + and Eu3 + ions on the optical properties of these glasses has been investigated in relation with their structural characteristics. The optical behavior of these materials has been studied by ultra-violet-visible (UV-Vis) spectroscopy, revealing absorption maxima specific to the doping ions. Structural information via vibration modes was provided by Fourier Transform Infrared (FTIR) absorption spectra evidenced as POP symmetrical and asymmetrical stretching vibration modes, POP bend, PO 2- symmetrical and asymmetrical stretching vibration modes, PO stretching vibration mode and POH water absorbance. Raman spectra acquired by 514.5 nm laser excitation disclosed peaks specific to metaphosphate network. Information about the elemental compositional homogeneity of Sm 3 + and Eu3 +-containing glasses as well as about the defects of the doped-glasses is revealed by scanning electron microscopy/energy dispersive spectrometry (SEM/EDS). Fluorescence spectroscopy measurements put in evidence important fluorescence peaks found at 596 nm and 643 nm for Sm 3 + ions in phosphate matrix and 611 nm and 700 nm in the case of Eu3 +-doped glass. © 2013 Elsevier B.V.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 15&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Sava, B.A.a</style></author><author><style face="normal" font="default" size="100%">Elisa, M.a</style></author><author><style face="normal" font="default" size="100%">Boroica, L.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Preparation method and thermal properties of samarium and europium-doped alumino-phosphate glasses</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science and Engineering B: Solid-State Materials for Advanced Technology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887058028&amp;doi=10.1016%2fj.mseb.2013.09.001&amp;partnerID=40&amp;md5=9bebffb0eeec40df209bb5b9b06f452d</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">20</style></number><volume><style face="normal" font="default" size="100%">178</style></volume><pages><style face="normal" font="default" size="100%">1429-1435</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The present work investigates alumino-phosphate glasses from Li 2O-BaO-Al2O3-La2O3-P 2O5 system containing Sm3+ and Eu3+ ions, prepared by two different ways: a wet raw materials mixing route followed by evaporation and melt-quenching, and by remelting of shards. The linear thermal expansion coefficient measured by dilatometry is identical for both rare-earth-doped phosphate glasses. Comparatively to undoped phosphate glass the linear thermal expansion coefficient increases with 2 × 10-7 K-1 when dopants are added. The characteristic temperatures very slowly decrease but can be considered constant with atomic weight, atomic number and f electrons number of the doping ions in the case of Tg (vitreous transition temperature) and Tsr (high annealing temperature) but slowly increase in the case of Tir (low annealing temperature-strain point) and very slowly increase, being practically constant in the case of TD (dilatometric softening temperature). Comparatively to undoped phosphate glass the characteristic temperatures of Sm and Eu-doped glasses present lower values. The higher values of electrical conductance for both doped glasses, comparatively to usual soda-lime-silicate glass, indicate a slightly reduced stability against water. The viscosity measurements, showed a quasi-linear variation with temperature the mean square deviation (R 2) being ranged between 0.872% and 0.996%. The viscosity of doped glasses comparatively to the undoped one is lower at the same temperature. Thermogravimetric analysis did not show notable mass change for any of doped samples. DSC curves for both rare-earth-doped phosphate glasses, as bulk and powdered samples, showed Tg values in the range 435-450 C. Bulk samples exhibited a very weak exothermic peak at about 685 C, while powdered samples showed two weak exothermic peaks at about 555 C and 685 C due to devitrification of the glasses. Using designed melting and annealing programs, the doped glasses were improved regarding bubbles and cords content and strain elimination. © 2013 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 7&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">PerdigãO, J.a</style></author><author><style face="normal" font="default" size="100%">Pinto, A.M.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.c</style></author><author><style face="normal" font="default" size="100%">Braz Fernandes, F.M.c</style></author><author><style face="normal" font="default" size="100%">Laranjeira, P.b</style></author><author><style face="normal" font="default" size="100%">Veiga, J.P.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Degradation of dental ZrO 2-based materials after hydrothermal fatigue. part I: XRD, XRF, and FESEM analyses</style></title><secondary-title><style face="normal" font="default" size="100%">Dental Materials Journal</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84864184709&amp;doi=10.4012%2fdmj.2011-216&amp;partnerID=40&amp;md5=deef23387cbfe92d76d6e45992fd15d7</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">31</style></volume><pages><style face="normal" font="default" size="100%">256-265</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The aim was to investigate the effect of simulated low-temperature degradation (s-LTD) and hydrothermal fatigue on the degradation of three ZrO2-based dental materials. Lava, IPS, and NanoZr discs were randomly assigned to (1) Control-Storage in distilled water at 37°C; (2) Aging at 134°C for 5 h (s-LTD); (3) Thermocycling in saliva for 30,000 cycles (TF). XRD revealed that ZrO 2 m phase was identified in all groups but TF increased the m phase only for Lava. Under the FESEM, Lava showed no alterations under s-LTD, but displayed corrosion areas up to 60 μm wide after TF. We conclude that TF accelerated the degradation of Lava through an increase in the m phase and grain pull-out from the material surface.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 4&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author><author><style face="normal" font="default" size="100%">Lopes, A.A.S.a</style></author><author><style face="normal" font="default" size="100%">Lima, M.M.A.a</style></author><author><style face="normal" font="default" size="100%">Veiga, J.P.a</style></author><author><style face="normal" font="default" size="100%">Silva, R.J.C.a</style></author><author><style face="normal" font="default" size="100%">Dias, C.J.a</style></author><author><style face="normal" font="default" size="100%">Davim, E.J.R.b</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Sintering, crystallization, and dielectric behavior of barium zinc borosilicate glasses-Effect of barium oxide substitution for zinc oxide</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of the American Ceramic Society</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84867097200&amp;doi=10.1111%2fj.1551-2916.2012.05418.x&amp;partnerID=40&amp;md5=9607c911c9d41fcdbabb20156c28e50d</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">10</style></number><volume><style face="normal" font="default" size="100%">95</style></volume><pages><style face="normal" font="default" size="100%">3144-3150</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Barium zinc borosilicate glasses with a molar composition xBaO-(60-x)ZnO-30B 2O 3-10SiO 2, where x ranged from 0 to 60 mol%, were prepared using melt-quenching method. The effect of BaO substitution for ZnO on the sintering, crystallization, and dielectric characteristics has been investigated. The behavior of the studied barium zinc borosilicate glasses was mainly determined by the relative amount of the structural modifier oxides (BaO and ZnO) and the ionic size, and field strength of the modifying cations (Ba 2+, Zn 2+). Increased amounts of BaO decreased both glass transition temperature and crystallization temperature, while increasing the relative dielectric constant. Sintering occurred before crystallization for glasses where substitution of BaO for ZnO was up to 30 mol%, but for higher substitution levels, crystallization occurred during the sintering process hindering densification. © 2012 The American Ceramic Society.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 5&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lima, M.M.R.A.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author><author><style face="normal" font="default" size="100%">Graça, M.P.F.b</style></author><author><style face="normal" font="default" size="100%">Ferreira Da Silva, M.G.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Structural, electrical and thermal properties of borosilicate glass-alumina composites</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Alloys and Compounds</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84863428569&amp;doi=10.1016%2fj.jallcom.2012.05.024&amp;partnerID=40&amp;md5=5f318f456f762069bd1e31ad5731c53a</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">538</style></volume><pages><style face="normal" font="default" size="100%">66-72</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Borosilicate glass-alumina composites with (1 - x) Glass + x Al 2O 3 (x = 0, 5, 10, 25 vol.%) were prepared and the effect of Al 2O 3 addition on the structural, electrical and thermal characteristics was investigated. XRD patterns revealed the presence of cristobalite (SiO 2) in sintered borosilicate glass and that the addition of Al 2O 3 hinders cristobalite formation. This behavior is due to the diffusion of some Al 3+ ions from alumina to glass, which leads to changes in glass structure and composition as identified by SEM/EDS. Cristobalite was undetected in composites containing 10% Al 2O 3 that attained the lowest thermal expansion coefficient value (∼4.6 × 10 -6 °C -1). Conductivity (dc and ac) increased with the amount of Al 3+ ions present in the glass structure as modifiers and formers. Dielectric constant values, in the range 5.0-7.2, increased with Al 2O 3 addition and the values of loss tan δ (1.5-2.1 × 10 -2) indicate that these materials are good insulators. © 2012 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 27&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ribeiro, A.S.M.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author><author><style face="normal" font="default" size="100%">Davim, E.J.R.a</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Ash from a pulp mill boiler-Characterisation and vitrification</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Hazardous Materials</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-77952879745&amp;doi=10.1016%2fj.jhazmat.2010.03.004&amp;partnerID=40&amp;md5=f8331393e9ea7e3c187255427a5ec26f</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">1-3</style></number><volume><style face="normal" font="default" size="100%">179</style></volume><pages><style face="normal" font="default" size="100%">303-308</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The physical, chemical and mineralogical characterisation of the ash resulting from a pulp mill boiler was performed in order to investigate the valorisation of this waste material through the production of added-value glassy materials. The ash had a particle size distribution in the range 0.06-53μm, and a high amount of SiO2 (∼82wt%), which was present as quartz. To favour the vitrification of the ash and to obtain a melt with an adequate viscosity to cast into a mould, different amounts of Na2O were added to act as fluxing agent. A batch with 80wt% waste load melted at 1350°C resulting in a homogeneous transparent green-coloured glass with good workability. The characterisation of the produced glass by differential thermal analysis and dilatometry showed that this glass presents a stable thermal behaviour. Standard leaching tests revealed that the concentration of heavy metals in the leaching solution was lower than those allowed by the Normative. As a conclusion, by vitrification of batch compositions with adequate waste load and additive content it is possible to produce an ash-based glass that may be used in similar applications as a conventional silicate glass inclusively as a building ecomaterial. © 2010 Elsevier B.V.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 10&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Elisa, M.a</style></author><author><style face="normal" font="default" size="100%">Sava, B.A.b</style></author><author><style face="normal" font="default" size="100%">Volceanov, A.c</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.d</style></author><author><style face="normal" font="default" size="100%">Alves, E.e</style></author><author><style face="normal" font="default" size="100%">Franco, N.e</style></author><author><style face="normal" font="default" size="100%">Costa Oliveira, F.A.f</style></author><author><style face="normal" font="default" size="100%">Fernandes, H.g</style></author><author><style face="normal" font="default" size="100%">Ferro, M.C.g</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Structural and thermal characterization of SiO2-P2O5 sol-gel powders upon annealing at high temperatures</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Non-Crystalline Solids</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-76549126026&amp;doi=10.1016%2fj.jnoncrysol.2009.12.006&amp;partnerID=40&amp;md5=f5f080373daf42ad8b221a950b3efa35</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">9-10</style></number><volume><style face="normal" font="default" size="100%">356</style></volume><pages><style face="normal" font="default" size="100%">495-501</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This study deals with SiO2-P2O5 powders obtained by sol-gel process, starting from tetraethoxysilane (TEOS) as precursor for SiO2 and either triethylphosphate (TEP) or phosphoric acid (H3PO4) as precursors for P2O5. In the case of samples prepared with H3PO4, TG-DTA data showed an accentuated weight loss associated to an endothermic effect up to about 140 °C, specific for the evaporation of water and ethylic alcohol from structural pores, and also due to alkyl-amines evaporation. Sol-gel samples prepared with TEP exhibited different thermal effects, depending on the type of atmosphere used in the experiments, i.e. argon or air. XRD analysis revealed that annealed sol-gel samples prepared with H3PO4 showed specific peaks for silicophosphate compounds such as Si3(PO4)4, Si2P2O9, and SiP2O7. XRD results for annealed sol-gel samples prepared with TEP indicated mainly the presence of a vitreous (amorphous) phase, which could be correlated with SEM images. The presence of SiO2 in the sample might be expected. Thus, we have searched for any SiO2 polymorph possible to crystallize. Only potential peaks of cristobalite were identified but some of them are overlapping with peaks of other crystalline phosphates. SEM analysis indicated a decrease of the amount of crystalline phases with the increase in the annealing temperature. © 2009 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 15&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Drasovean, R.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.b</style></author><author><style face="normal" font="default" size="100%">Cherif, M.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Structure and morphology study of cobalt oxide doped silica nanocomposite films</style></title><secondary-title><style face="normal" font="default" size="100%">AIP Conference Proceedings</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-76749111630&amp;doi=10.1063%2f1.3322492&amp;partnerID=40&amp;md5=a0de6bd9c11bb1dbbf8080aef09ad0e1</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">1203</style></volume><pages><style face="normal" font="default" size="100%">483-488</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Cobalt oxide doped silica films were synthesized by a dip-coating technique. Initial compounds were cobalt acetate Co(CH3COO)2-4H 2O and tetraethoxysilane Si(OC2H5)4. The chemical composition was studied by X-ray diffraction and UV-Vis spectroscopy. The morphology analyses were carried out by means of atomic force microscopy. The average diameter of cobalt oxide dispersed particles increases with the molar ratio Co:Si and with the aging time of the initial colloidal solution. © 2009 American Institute of Physics.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author><author><style face="normal" font="default" size="100%">Figueiredo, C.F.a</style></author><author><style face="normal" font="default" size="100%">Alendouro, M.S.a</style></author><author><style face="normal" font="default" size="100%">Ferro, M.C.b</style></author><author><style face="normal" font="default" size="100%">Davim, E.J.R.b</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Characterization of MSWI bottom ashes towards utilization as glass raw material</style></title><secondary-title><style face="normal" font="default" size="100%">Waste Management</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-41949122045&amp;doi=10.1016%2fj.wasman.2007.05.004&amp;partnerID=40&amp;md5=798da148fba845d32537e531edf4192b</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">7</style></number><volume><style face="normal" font="default" size="100%">28</style></volume><pages><style face="normal" font="default" size="100%">1119-1125</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The characterization of the bottom ashes produced by two Portuguese municipal solid waste incinerators (MSWI) was performed with the aim of assessing the feasibility of using this waste as raw material in the production of glass that can be further processed as glass-ceramics for application in construction. Density and particle size distribution measurements were carried out for physical characterization. Chemical characterization revealed that SiO2, a network glass former oxide, was present in a relatively high content (52-58 wt%), indicating the suitability for this waste to be employed in the development of vitreous materials. CaO, Na2O and K2O, which act as fluxing agents, were present in various amounts (2-17 wt%) together with several other oxides normally present in ceramic and glass raw materials. Mineralogical characterization revealed that the main crystalline phases were quartz (SiO2) and calcite (CaCO3) and that minor amounts of different alkaline and alkaline-earth aluminosilicate phases were also present. Thermal characterization showed that the decomposition of the different compounds occurred up to 1100 °C and that total weight loss was &amp;lt;10 wt%. Heating both bottom ashes at 1400 °C for 2 h resulted in a melt with suitable viscosity to be poured into a mould, and homogeneous black-coloured glasses with a smooth shiny surface were obtained after cooling. The vitrified bottom ashes were totally amorphous as confirmed by X-ray diffraction. The results from the present experimental work indicate that the examined bottom ashes can be a potential material to melt and to obtain a glass that can be further processed as glass-ceramics to be applied in construction. © 2007 Elsevier Ltd. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 18&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Clemente, C.S.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Development of structural ceramics from fly ash and shale</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-60349108479&amp;partnerID=40&amp;md5=d42c9212acd457071eb488daa65378b5</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">587-588</style></volume><pages><style face="normal" font="default" size="100%">787-791</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The possibility of using fly ash and shale as alternative raw materials for the production of structural ceramics was investigated. Fly ash is a by-product from coal-burning power plants, and shale is a sedimentary rock that if ground finely enough can exhibit a clay-like plasticity. Ceramic samples containing 10-50 wt% fly ash were formed from mechanical mixing of both kinds of powders that were packed and sintered in the temperature range 950-1200°C It was verified that powders with larger fly ash content exhibited lower packing density resulting in compacts with a lower sintered density. Although an increase in fly ash content was associated to a larger presence of porosity in the sintered samples, as confirmed by microstructural analysis, all studied compositions when sintered at the highest temperatures exhibited satisfactory values for water absorption (&amp;lt; 10%), for flexural strength (20-64 MPa) and for hardness (20-30 GPa) indicating that they have potential to be applied in the production of structural ceramics.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Alves, S.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Mechanical characteristics of clay structural ceramics containing coal fly ash</style></title><secondary-title><style face="normal" font="default" size="100%">International Journal of Mechanics and Materials in Design</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-43049097183&amp;doi=10.1007%2fs10999-007-9049-8&amp;partnerID=40&amp;md5=9b7a315b6ba404302c9eea414720898a</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">4</style></volume><pages><style face="normal" font="default" size="100%">213-220</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;In this work, the mechanical characterization of ceramic products processed from red clay with different amounts of added coal fly ash was investigated. Coal fly ash produced by power plants is a waste material that constitutes an alternative source of minerals for the production of traditional building ceramics, as it is a complex mixture of several oxides such as SiO2, Al2O3, CaO, Fe2O3, Na2O, TiO2, which are usually present in the composition of such ceramics. A powder technology and firing route was followed for the processing of the clay and coal fly ash based ceramics. Different proportions of waste (10, 25 and 50%, by weight) were added to red clay, and then the mixed powders were pressed to form compacts that were fired at a selected temperature in the range 850-1,150°C. The effects of waste content and of heating conditions on the microstructure and mechanical characteristics of the obtained materials were investigated. The density, porosity, water absorption, flexural strength, hardness and fracture toughness of the produced materials were evaluated. A comparison was made between the properties of the produced ceramics with those of traditional ceramic materials used in construction, e.g. floor or wall tiles, and it was observed that the clay based products with coal fly ash additions may be used in similar applications. © 2007 Springer Science+Business Media B.V.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 7&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Musat, V.a</style></author><author><style face="normal" font="default" size="100%">Rego, A.M.c</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.b</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Microstructure and gas-sensing properties of sol-gel ZnO thin films</style></title><secondary-title><style face="normal" font="default" size="100%">Thin Solid Films</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-38649132641&amp;doi=10.1016%2fj.tsf.2007.07.198&amp;partnerID=40&amp;md5=ba8220798e25160c1dcfc599e244e15f</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">7</style></number><volume><style face="normal" font="default" size="100%">516</style></volume><pages><style face="normal" font="default" size="100%">1512-1515</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The paper presents the properties of zinc oxide thin films deposited on glass substrate via dip-coating technique. Zinc acetate dehydrate, ethanol and monoethanol amine were used as starting materials and N2 gas was used as thermal annealing atmosphere for film crystallization. The effect of withdrawal speed on the crystalline structure, morphology, zinc and nitrogen chemical states, optical, electrical and gas-sensing properties of the thin films has been investigated using X-ray diffraction, atomic force microscopy, X-ray photoelectron spectroscopy, optical transmittance and photoreduction-ozone reoxidation data. © 2007 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 58&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Musat, V.a</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.b</style></author><author><style face="normal" font="default" size="100%">Botelho do Rego, A.M.c</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Sol-gel cobalt oxide-silica nanocomposite thin films for gas sensing applications</style></title><secondary-title><style face="normal" font="default" size="100%">Thin Solid Films</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-38649107107&amp;doi=10.1016%2fj.tsf.2007.07.197&amp;partnerID=40&amp;md5=e2d9f708c5a3bc4e6aa8158bebf3f2ae</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">7</style></number><volume><style face="normal" font="default" size="100%">516</style></volume><pages><style face="normal" font="default" size="100%">1499-1502</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Various metal oxide-silica nanocomposite films have been recently proposed as gas-sensitive materials. This paper presents results on cobalt oxide-SiO2 mesoporous nanocomposite thin films templated by a cationic surfactant. The films were deposited on glass substrate by dip-coating process, using [Co(CH3COO)2]·4H2O and tetraethoxysilane (TEOS) as starting materials. The effect of withdrawal speed, number of layers and thermal treatment on the crystalline structure, morphology, Co-doping states, optical, electrical and gas sensing properties of the thin films has been investigated using X-ray diffraction, atomic force microscopy, X-ray photoelectron spectroscopy, optical transmittance and room temperature photoreduction-oxidation data. © 2007 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 12&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Viscous sintering in a glass-alumina system</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-60349089073&amp;partnerID=40&amp;md5=efc783b8480a960850f50cfa3b172b33</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">587-588</style></volume><pages><style face="normal" font="default" size="100%">143-147</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The densification during sintering of borosilicate glass matrix composites with 25 vol. % alumina (Al2O3) particles was investigated. The powder compacts, isostatically pressed at 200 MPa, were sintered at a temperature within the range 800-1000° C and maintained at this temperature during various times. The sintering behaviour of the composites was investigated by density measurement and by axial and radial shrinkage measurements. The crystalline phases present in the sintered composites were identified by XRD and the microstructure was analyzed by SEM. For temperatures up to 900°C, the relative density of the composites increased continuously with sintering temperature and sintering time, while for higher temperatures, the density increased rapidly and then slowed down to achieve a nearly constant value after sintering the composites for 30 minutes. The composites exhibited isotropic shrinkage behaviour when sintered at 800°C and 850°C, but at higher temperatures slightly higher axial shrinkage than radial shrinkage was observed. The shrinkage behaviour and microstructural characteristics of the composites indicate that densification during sintering can be attributed to the viscous flow of the borosilicate glass.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Davim, E.a</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Glass-ceramics produced from incinerated municipal solid waste</style></title><secondary-title><style face="normal" font="default" size="100%">Glass Technology: European Journal of Glass Science and Technology Part A</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-34548567193&amp;partnerID=40&amp;md5=bcbd185d67d95ae93b77903a488c67f5</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">4</style></number><volume><style face="normal" font="default" size="100%">48</style></volume><pages><style face="normal" font="default" size="100%">164-167</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A homogeneous black coloured glass was obtained by melting the bottom ashes produced by a municipal solid waste incinerator at 1300°C for 2 h without any chemical additives. Based on thermal analysis data glass-ceramics were produced by heat treating the glass, doped with additional TiO2 as a nucleating agent, at temperatures between 870 and 1000°C. The crystalline phases precipitated during the heat treatments were identified by powder XRD and the microstructures were examined using SEM. After a heat treatment at 900°C for 2 h, the glass was converted into a fine grained glass-ceramic with uniform microstructure. The major crystalline phases precipitated in the glass-ceramics were augite (Ca(Mg,Fe)Si2O6), gehlenite (Ca2Al2SiO7) and clinopyroxene (Ca(Ti,Mg,Al)(Si,Al)2O6). Preliminary evaluation of the mechanical and chemical properties of the bottom ash glasses and glass-ceramics suggest that they have potential to compete with existing natural and commercial outdoor cladding materials.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 4&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Muşat, V.a</style></author><author><style face="normal" font="default" size="100%">Budrugeac, P.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.c</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.c</style></author><author><style face="normal" font="default" size="100%">Segal, E.d</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Non-isothermal kinetic study on the decomposition of Zn acetate-based Sol-gel precursor: Part 1. Application of the isoconversional methods</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Thermal Analysis and Calorimetry</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-34547151682&amp;doi=10.1007%2fs10973-006-7532-3&amp;partnerID=40&amp;md5=15fa6b50688e5733663aaf985c534383</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">89</style></volume><pages><style face="normal" font="default" size="100%">505-509</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The isoconversional methods (Friedman (FR), Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS)) were applied for evaluating the dependencies of the activation energy (E) on the mass loss (Δm) corresponding to the non-isothermal decomposition of two Zn acetate-based gel precursors for ZnO thin films whose preparation differs by the drying temperature of the liquid sol-precursor (125°C for sample A, and 150°C for sample B). Although both investigated samples exhibit similar decomposition steps, strong differences between E vs. Δm curves as well as among the characteristic parameters of the decomposition steps, directly evaluated from TG, DTG and DTA curves, were put in evidence. © 2007 Springer Science+Business Media LLC.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 11&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author><author><style face="normal" font="default" size="100%">Alendouro, S.J.G.a</style></author><author><style face="normal" font="default" size="100%">Figueiredo, F.M.L.a</style></author><author><style face="normal" font="default" size="100%">Ferro, M.C.b</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Development and properties of a glass made from MSWI bottom ash</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Non-Crystalline Solids</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-30144442237&amp;doi=10.1016%2fj.jnoncrysol.2005.11.008&amp;partnerID=40&amp;md5=b40f9f03770c53a99766d2e028fcf013</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">352</style></volume><pages><style face="normal" font="default" size="100%">130-135</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A uniform shiny black-coloured glass was obtained using bottom ash produced by a Portuguese municipal solid waste incinerator (MSWI). The bottom ash was the single batch material used in the formation of the glass, which was obtained by vitrification of the solid waste at 1400 °C for 2 h. Under these conditions, a homogeneous melt with an appropriate viscosity to be shaped was obtained, indicating the suitability of this waste material to be employed in the development of vitreous products. The characterization of the resulting glass was performed in order to assess its structural, physical, mechanical, thermal and chemical features. The glass had a density of 2.69 g cm -3, a hardness of 5.5 GPa, a fracture strength of 75 MPa, a thermal expansion coefficient of 9.5 × 10-6 °C-1 and it exhibited a very good chemical stability. In summary, the MSWI bottom ash glass has good mechanical and chemical properties and may, therefore, be used in several applications, particularly as a construction material. © 2005 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 21&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author><author><style face="normal" font="default" size="100%">Mota, C. S.</style></author><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of dolomite addition on the densification of fly ash based ceramics</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-37849010244&amp;partnerID=40&amp;md5=76a031fe59823cfe22aaea3255ecf2aa</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">PART 2</style></number><volume><style face="normal" font="default" size="100%">514-516</style></volume><pages><style face="normal" font="default" size="100%">1711-1715</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Fly ash from Tapada do Outeiro, a coal power plant in the north of Portugal, has been processed by a powder technology route in order to obtain durable and mechanical resistant ceramics. Dolomite (CaC03.MgC03) was added in different proportions to the waste material, from zero up to 10 wt%, and the effect of this addition on the densification behaviour of the fired samples was investigated by measuring the apparent density, the open porosity and the linear shrinkage. The powder mixtures were uniaxially dry pressed in a steel die and fired at temperatures ranging from 950 to 1150°C XRD and SEM were used to identify the phases present in the sintered materials and the degree of densification. The results revealed that added dolomite was responsible for the appearance of anorthite, an extra phase besides mullite and quartz, for an increase in the amount of liquid phase and for the swelling of closed pores at the highest firing temperatures. Significant morphological changes and phase transformations occurred during sintering and their effects on the physical-mechanical and leaching characteristics of the sintered materials were analyzed.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Musat, V.a</style></author><author><style face="normal" font="default" size="100%">Teixeira, B.b</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of post-heat treatment on the electrical and optical properties of ZnO:Al thin films</style></title><secondary-title><style face="normal" font="default" size="100%">Thin Solid Films</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-33344473579&amp;doi=10.1016%2fj.tsf.2005.07.278&amp;partnerID=40&amp;md5=a98c15d66fb116375e99672c801e5a67</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">1-2</style></number><volume><style face="normal" font="default" size="100%">502</style></volume><pages><style face="normal" font="default" size="100%">219-222</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This paper presents the effect of post-heating temperature and atmosphere on the electrical and optical properties of ZnO:Al thin films prepared by the sol-gel method. The electrical properties of the n-type semiconductor thin films showed that for the final films, the values of carrier concentration ranged between 2.76 and 9.96 × 1019 cm- 3, the Hall mobility values between 7 and 34.1 cm2/V s and the resistivity values between 2.9 × 10- 3 and 5.0 × 10- 2 Ω cm, depending on the processing conditions. For the thin film doped with 2 wt.% Al, preheated at 400 °C and post-heated for 1 h in air at 600 °C, a resistivity of 2.9 × 10- 3 Ω cm has been reached after annealing under a reducing atmosphere of forming gas. The optical transmittance spectra of the only post-heated films and of the post-heated and annealed films showed a good transmittance (75-90%) within the visible wavelength region and some small effects of Al-doping concentration and annealing treatment in forming gas. © 2005 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 66&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lapa, N.a</style></author><author><style face="normal" font="default" size="100%">Barbosa, R.a</style></author><author><style face="normal" font="default" size="100%">Camacho, S.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.c</style></author><author><style face="normal" font="default" size="100%">Oliveira, J.S.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Leaching behaviour of a glass produced from a MSWI bottom ash</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-37849027226&amp;partnerID=40&amp;md5=0567e71231919ae6ad14b74c328a4156</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">PART 2</style></number><volume><style face="normal" font="default" size="100%">514-516</style></volume><pages><style face="normal" font="default" size="100%">1736-1741</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This paper is mainly focused on the characterisation of a glass material (GM) obtained from the thermal treatment of a bottom ash (BA) produced at the Municipal Solid Waste (MSW) incineration plant of Valorsul. By melting the BA at 1400°C during 2 hours, and without using any chemical additives, a homogeneous black-coloured glass was obtained. The thermal and mechanical properties of this glass were characterised. The thermal expansion coefficient, measured by dilatometry, was 9-10 × 10-6 per °C and the modulus of rupture, determined by four-point bending test, was 75±6 MPa, which are similar values to those exhibited by commercial soda-lime-silica glasses used in structural applications. The chemical and the ecotoxicological leaching behaviour of the GM were also analysed. The GM was submitted to a leaching procedure composed of 15 sequential extraction cycles. A liquid/solid (L/S) ratio of 2 1/kg was applied in each cycle. The leachates were filtered through a membrane of PTFE (porosity: 0.45 μm). The filtered leachates were characterised for different chemical parameters and for an ecotoxicological indicator (bacterium Vibrio fischeri). The GM was also submitted to a microwave acidic digestion for the assessment of the total metal content. The crude BA was also submitted to the same experimental procedures. The GM showed levels of chemical emission and ecotoxicity for V. fischeri much lower than those determined for the crude BA. Similar characterisation studies will be pursued with the glass-ceramics produced by adequate thermal treatment of the glass, in order to investigate the effect of the crystallization on the final properties.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Drasovean, R.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.b</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.b</style></author><author><style face="normal" font="default" size="100%">Musat, V.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Optical properties of cobalt oxide films by a dipping sol-gel process</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Non-Crystalline Solids</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-33744510277&amp;doi=10.1016%2fj.jnoncrysol.2006.02.036&amp;partnerID=40&amp;md5=2366fc78c82c79c134756992b0b62968</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">9-20 SPEC. ISS.</style></number><volume><style face="normal" font="default" size="100%">352</style></volume><pages><style face="normal" font="default" size="100%">1479-1485</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Cobalt oxide thin films were prepared by using the dipping sol-gel process. The films were deposited onto glass slides, starting from methanolic solution of cobalt acetate Co(CH3COO)2 · 4H2O. The effects of film thickness and sol concentration on structural and optical properties were studied. Structural analyses of Co3O4 films were performed by X-ray diffraction. The film thickness was varied by using different withdrawal speeds and the number of dipping-heating cycles. It was found that the grain size increases with the number of dipping N. The results point out to some compacting effect that increases with the number of dippings: the films exhibit direct and indirect optical transition, absorption coefficients are of the order of 104 cm-1, and upon annealing the absorption coefficient increases. © 2006 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 21&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Shrinkage behaviour of borosilicate glass-Al2O3 composites during isothermal sintering</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-37849028564&amp;partnerID=40&amp;md5=5a6a88e1123eacae4e05d6f693513e4e</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">PART 1</style></number><volume><style face="normal" font="default" size="100%">514-516</style></volume><pages><style face="normal" font="default" size="100%">648-652</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The effect of rigid inclusions on the densification during isothermal sintering of glass matrix composites was investigated. Mixtures containing borosilicate glass powder and 0, 5, 10 and 25 vol. % alumina (Al 2O3) particles were prepared and powder compacts isostatically pressed at 200 MPa have been used. The sintering behaviour of the samples heated at 800°C during various times was investigated through density measurement, axial and radial shrinkage measurements. The microstructure was analysed by SEM and the crystalline phases present in the sintered composites were identified by XRD. The relative density of the isothermally treated borosilicate glass-Al2O3 composites decreased significantly with the increase in Al2O3 content because the presence of rigid inclusions retarded the densification of the compacts. The borosilicate glass exhibited anisotropic shrinkage behaviour, showing a radial shrinkage higher than the axial shrinkage and isotropic shrinkage was favoured by Al2O3 additions. Sintered glass showed a dense microstructure with some spherical closed pores. The microstructure of composites with 5 vol. % Al2O3 revealed that most of the pores were filled by capillary flow of the glass. The microstructure of composites with higher Al2O3 additions showed dense areas together with interconnected pores, which appeared at the sites of large glass particles in the green compacts.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Muşat, V.a</style></author><author><style face="normal" font="default" size="100%">Vilarinho, P.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.c</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.c</style></author><author><style face="normal" font="default" size="100%">Segal, E.d</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Thermoreactivity of sol-gel precursor for ZnO-based thin films</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-37849048524&amp;partnerID=40&amp;md5=e586f5b0ab8dbf0e0b8df979c8324c00</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">PART 1</style></number><volume><style face="normal" font="default" size="100%">514-516</style></volume><pages><style face="normal" font="default" size="100%">73-77</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The thermoreactivity of a zinc acetate non-alkoxide solution used for the preparation of ZnO-based thin films was investigated in the temperature range 20-600°C by TG-DTA, XRD and SEM data. We found that the formation in air of ZnO crystallites from the sol-gel precursor occurs above 150°C simultaneously with the decomposition of an intermediary compound, most probably carbonate hydroxide (sciante and/or hydrozincite). At 200°C, the crystalline structure is well defined in terms of ZnO hexagonal lattice parameters, although residual organic compounds and water were not yet fully removed and an amorphous phase coexists. A kinetic investigation on the thermal decomposition of sol-gel precursor from DTA data using Kissinger differential equation is also presented. Apparent activation energy values of about. 100 kJ mol-1 corresponding to the non-isothermal decomposition of solid precursors in the temperature range 170-250°C have been found.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ferro, M.C.a</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of heat treatment on the microstructure of fly ash derived glass ceramics</style></title><secondary-title><style face="normal" font="default" size="100%">Glass Technology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2005</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-23244439585&amp;partnerID=40&amp;md5=4bb154d4c66229e6444ba185ea73b403</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">46</style></volume><pages><style face="normal" font="default" size="100%">151-154</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Mixtures of fly ash, calcite and soda ash were prepared by keeping the amount of fly ash at 80 wt% and adding the other raw materials in order to obtain Na2O/CaO ratios of 1/3, one and three. On melting all mixtures led to black glassy materials. Several heat treatments were performed on these glasses at temperatures suggested by DTA. The crystalline phases precipitated during the heat treatments were identified by XRD on powdered samples and the microstructures of the obtained glass ceramics were observed by SEM. The formulations tended to precipitate pyroxene solid solutions and aluminium silicates of calcium and/or sodium, during the heat treatments. The glass ceramics mainly contained fine crystals. However some of the materials obtained from glasses with Na2O/CaO ratios of 1/3 and three had non-uniform microstructures. It is generally concluded that the microstructure of these crystallised glasses is critically dependent on both composition and heat treatment.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Muşat, V.a</style></author><author><style face="normal" font="default" size="100%">Gheorghieş, C.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.b</style></author><author><style face="normal" font="default" size="100%">Segal, E.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Kinetics of oxides thin films crystallization from sol-gel precursor</style></title><secondary-title><style face="normal" font="default" size="100%">Revista de Chimie</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2005</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-33751294556&amp;partnerID=40&amp;md5=06ae433f3ff48c5f7011b5a0835f3a35</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">4</style></number><volume><style face="normal" font="default" size="100%">56</style></volume><pages><style face="normal" font="default" size="100%">367-370</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The kinetics of crystallization of transparent and conductive high preferential c-axis oriented Aldoped ZnO thin films on Corning 1737 glass substrate from amorphous sol-gel precursor prepared using zinc acetate and aluminum chloride as cations source, 2-methoxiethanol as solvent and monoethanolamine as sol stabilizer has been investigated. The effect of preheating temperature on the values of the kinetic parameters and crystallization mechanism is discussed. Some data concerning the microstructure, the electrical and optical properties of the thin films are presented.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Musat, V.a</style></author><author><style face="normal" font="default" size="100%">Teixeira, B.b</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author><author><style face="normal" font="default" size="100%">Vilarinho, P.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Al-doped ZnO thin films by sol-gel method</style></title><secondary-title><style face="normal" font="default" size="100%">Surface and Coatings Technology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-1842731894&amp;doi=10.1016%2fj.surfcoat.2003.10.112&amp;partnerID=40&amp;md5=f55d20fb2c65cb8ea936d035c84d3670</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">180-181</style></volume><pages><style face="normal" font="default" size="100%">659-662</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Transparent and conductive high preferential c-axis oriented ZnO thin films doped with Al have been prepared by sol-gel method using zinc acetate and aluminium chloride as cations source, 2-methoxiethanol as solvent and monoethanolamine as sol stabilizer. Film deposition was performed by dip-coating technique at a withdrawal rate of 1.5 cm min-1 on Corning 1737 glass substrate. The effect of dopant concentration, heating treatment and annealing in reducing atmosphere on the microstructure as well as on the electrical and optical properties of the thin films is discussed. The optical transmittance spectra of the films showed a very good transmittance, between 85 and 95%, within the visible wavelength region. The minimum resistivity of 1.3 × 10-3 Ω cm was obtained for the film doped with 2 wt.% Al, preheated at 400 °C and post-heated at 600 °C, after annealing under a reduced atmosphere of forming gas. © 2003 Elsevier B.V. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 157&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Crystallization of a borosilicate glass during sintering studied by dilatometry and XRD analysis</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-17044449256&amp;partnerID=40&amp;md5=5cb4060f0a286b2e7dffa9e5fb78be9c</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">455-456</style></volume><pages><style face="normal" font="default" size="100%">212-215</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The crystallization of a borosilicate glass, when compacts of powdered glass were sintered under various conditions, was investigated by dilatometric and XRD analysis. The dilatometry results from non-isothermal sintering experiments until 800°C, performed at different heating rates (1, 2, 5, 8 and 10°C/min), revealed that the compacts started to shrink above ∼ 600°C and that the shrinkage decreased with the increase of the heating rate for temperatures up to ∼750°C. Above this temperature, and specifically when the samples were heated at heating rates &amp;lt; 5°C /min, the shrinkage was hindered, while samples heated at heating rates ≥ 5°C/min showed continuous shrinkage. XRD results showed that the formation of cristobalite had occurred during the sintering at the lowest heating rates and therefore, the presence of this crystalline phase was affecting the shrinkage of the compacts, inhibiting further sintering of the glass. The crystallization of the glass when sintered at a temperature in the range 700-850°C and hold at the selected temperature during various times was also analysed. XRD results showed that both cristobalite and quartz were present in glass compacts sintered under particular conditions (for example, after heating during 24h at 725°C and 765°C). Quartz dissolution took place when the glass samples were sintered at 850°C. At this temperature and whatever the sintering time, cristobalite was the only crystalline phase present in the sintered compacts.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Muşat, V.a</style></author><author><style face="normal" font="default" size="100%">Teixeira, B.b</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author><author><style face="normal" font="default" size="100%">Vilarinho, P.c</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of thermal treatment on the properties of sol-gel derived Al-doped ZnO thin films</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-17144441920&amp;partnerID=40&amp;md5=f43fe9d31c9c4cf286c2d22335fd022a</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">455-456</style></volume><pages><style face="normal" font="default" size="100%">16-19</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This paper presents preliminary results on Al doped ZnO thin films prepared by the solgel method. The thin films were produced by a dip-coater technique on glass substrate, using zinc acetate dihydrate, aluminium chloride hexahydrate, 2-methoxyethanol and monoethanolamine as raw materials. The ZnO thin films were analysed by XRD, Hall effect and SEM measurements. In order to determine the influence of the thermal treatments on the film properties, a set of four different heat treatments (atmosphere and temperature) were studied. All the films are polycrystalline presenting a crystallographic c-axis orientation (002) perpendicular to the substrate. The best results were obtained for films pre-heated at 400°C and post-heated for 1 hour in air at 600°C, after annealing under a reduced atmosphere of forming gas, where a resistivity of 3.9×10-3 Ωcm, a Hall mobility of 34.1 cm2/Vs, a carrier concentration of 4.7×1019 cm-3 and an optical transmittance of 90% were achieved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ferro, M.C.a</style></author><author><style face="normal" font="default" size="100%">Fernandas, M.H.V.a</style></author><author><style face="normal" font="default" size="100%">Figueiredo, C.F.M.L.b</style></author><author><style face="normal" font="default" size="100%">Alendouro, M.S.J.G.b</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of TiO2 on the crystallization of fly-ash based glass-ceramics</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-3142658736&amp;partnerID=40&amp;md5=485026948b9013b44279924f2543cb78</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">455-456</style></volume><pages><style face="normal" font="default" size="100%">831-834</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A batch of coal fly-ash, soda and lime was melted, quenched to a glass and then devitrified, by one-step heating cycles, forming coarse fibrous microstructures with pores and cracks, resulting in low strength materials. The crystallization behaviour of the based glass was further studied by adding a nucleating agent, TiC2. The resulting structural and microstrutural changes were investigated by differential thermal analysis, scanning electron microscopy, x-ray diffraction, dilatometry and density measurements. The results indicated that the addition of TiO2 could provide a finer grained microstructure, suitable for the production of structural materials.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 0&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alendouro, M.S.J.G.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.a</style></author><author><style face="normal" font="default" size="100%">Figueiredo, C.F.M.L.a</style></author><author><style face="normal" font="default" size="100%">Martins, R.M.S.a</style></author><author><style face="normal" font="default" size="100%">Silva, R.J.C.a</style></author><author><style face="normal" font="default" size="100%">Ferro, M.C.b</style></author><author><style face="normal" font="default" size="100%">Fernandas, M.H.V.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Microstructural characterization and properties of a glass and a glassceramic made from municipal incinerator bottom ash</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Science Forum</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-3142698407&amp;partnerID=40&amp;md5=0236c72a25f8a81a16f0350028d794c9</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">455-456</style></volume><pages><style face="normal" font="default" size="100%">827-830</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A glass was made using bottom ash produced by a Portuguese municipal solid waste (MSW) incinerator. The bottom ash was the single batch material used in the formation of the glass, which was obtained through a conventional melt-quenching method. The glass was then converted to glass-ceramic for further recycling to construction materials. After submitting the glass samples to several heat treatments, between 820 and 1050°C and during different times, it was verified that the optimum heat treatment schedule for the ceramization of the glass was at 1000°C for 10h, as confirmed by microstructural observation and by X-ray diffraction. The major crystalline phases precipitated in the glass-ceramic were wollastonite (CaSiO3) and diopside (Ca(Mg,Al)(Si,Al)2O6). Microstructural analysis of the glass-ceramic revealed that the crystalline phases were present as dendrites and fiber-like structures that were homogeneously distributed in the material. The glassceramic showed good mechanical properties with a hardness of 5.6 MPa and a bending strength of 101 MPa. This material had a density of 2.8 gcm-3 and a thermal expansion coefficient of 9.10-6°C-1. The glass and the glass-ceramic showed an excellent chemical stability against leaching in acidic solution and in alkaline solution. In summary, both the glass and the glass-ceramic have good chemical and mechanical properties and can, therefore, be applied as construction materials.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effect of compaction on the sintering of borosilicate glass/alumina composites</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of the European Ceramic Society</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2003</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0038319012&amp;doi=10.1016%2fS0955-2219%2802%2900422-3&amp;partnerID=40&amp;md5=f22042bca319c5e659231d1bdd8d81e8</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">11</style></number><volume><style face="normal" font="default" size="100%">23</style></volume><pages><style face="normal" font="default" size="100%">1813-1818</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The effect of initial compaction on the sintering of borosilicate glass matrix composites reinforced with 25 vol.% alumina (Al2O3) particles has been studied using powder compacts that were uniaxially pressed at 74, 200 and 370 MPa. The sintering behaviour of the samples heated in the temperature range 850-1150 °C was investigated by density measurement, axial and radial shrinkage measurement and microstructural observation. The density of the sintered composites increased continuously with temperature for compacts pressed at 74 MPa, while for compacts pressed at 200 and 370 MPa it reached the maximum value at 1050 °C and at higher temperatures it decreased slightly due to swelling. The results showed anisotropic shrinkage behaviour for all the samples, which exhibited an axial shrinkage higher than the radial shrinkage, and the anisotropic character increased with the initial compaction pressure. © 2003 Elsevier Science Ltd. All rights reserved.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 17&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Muşat, V.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.b</style></author><author><style face="normal" font="default" size="100%">Martins, R.b</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Thermal decomposition of a sol-gel precursor for C-axis oriented Al-doped ZnO thin films</style></title><secondary-title><style face="normal" font="default" size="100%">Revue Roumaine de Chimie</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2003</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-8344260624&amp;partnerID=40&amp;md5=e90edfc256b8aac774fcf0d7583646ca</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">12</style></number><volume><style face="normal" font="default" size="100%">48</style></volume><pages><style face="normal" font="default" size="100%">967-974</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The thermal decomposition and crystallization behaviour of a sol-gel precursor used for the preparation of c-axis oriented Al-doped ZnO thin films were investigated in the temperature range 20-600°C by TG-DTA, IR spectroscopy and XRD analysis. At low temperature, the formation of ZnO crystallites from the sol precursor, prepared by dissolving Zn(CH 3COO)2·2H2O and AlCl 3·6H2O in 2-methoxyethanol and monoethanol amine, takes place via zinc carbonate hydroxide (sclarite/hydrozincite) and occurs simultaneously with the decomposition of this intermediary compound, which occurs above 150°C. At 200°C, the crystalline structure is well defined in terms of ZnO hexagonal lattice parameters, although an important amount of residual organic compounds and water was not yet removed. Increasing the treatment temperature up to 300, 400 and 600°C leads to a gradual removal of the residual organic compounds and therefore to a small change of the ZnO crystalline structure in terms of lattice parameters and grain size.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 3&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ferro, M.C.</style></author><author><style face="normal" font="default" size="100%">Leroy, C.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author><author><style face="normal" font="default" size="100%">Fernandes, M. H. V</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Fine-grained glass-ceramics obtained by crystallisation of vitrified coal ashes</style></title><secondary-title><style face="normal" font="default" size="100%">Key Engineering Materials</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036429049&amp;partnerID=40&amp;md5=f7e2a02f3efbae3074f89570556b73d8</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">230-232</style></volume><pages><style face="normal" font="default" size="100%">408-411</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Coal fly ashes have been vitrified by melting with Na2O and CaO as fluxing additives. Adequate heat treatments on the fly ash derived glass produced attractive dark green glass-ceramics. These glass-ceramics exhibited fine-grained microstructures consisting of esseneite and nepheline crystals, with average size below 200 nm, homogeneously dispersed in a residual glassy matrix. Several properties, such as density, thermal expansion coefficient, bending strength, hardness and brittleness index were determined and the correlation microstructure-properties is discussed. The results suggest that these coal ash-based glass-ceramics have potential applications as structural materials or as cladding materials.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 7&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lima, M. M. R. A.</style></author><author><style face="normal" font="default" size="100%">Braz Fernandes, F. M.</style></author><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Study of the crystallization of a borosilicate glass</style></title><secondary-title><style face="normal" font="default" size="100%">Key Engineering Materials</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036432482&amp;partnerID=40&amp;md5=c701873e649430f5aee32395b74224f4</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">230-232</style></volume><pages><style face="normal" font="default" size="100%">157-160</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The crystallization of a commercial borosilicate glass powder has been studied in the temperature range 750-900°C. Crystal growth was investigated by high temperature XRD and cristobalite precipitation was identified. Glass devitrification exhibited a characteristic incubation period that decreased with increasing temperature: 25-30 min at 750°C, 9-12 min at 775°C, 5-10 min at 810°C, and 0-5 min at 840°C. Cristobalite is an unfavorable transformation product in terms of thermal expansion behavior. The precipitation of cristobalite in sintered glass compacts was confirmed by dilatometric analysis, where the increase in thermal expansion coefficient due to the presence of cristobalite and its transition from the tetragonal to the cubic phase were verified. Correlation between the XRD results and the dilatometric data from sintered glass compacts showed the partial dissolution of cristobalite when the glass was heated at the highest temperatures.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lopes, A.</style></author><author><style face="normal" font="default" size="100%">Nunes, P</style></author><author><style face="normal" font="default" size="100%">Vilarinho, P.</style></author><author><style face="normal" font="default" size="100%">R. Monteiro</style></author><author><style face="normal" font="default" size="100%">Fortunato, E.</style></author><author><style face="normal" font="default" size="100%">Martins, R.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Study of the sensing mechanism of SnO2 thin-film gas sensors using hall effect measurements</style></title><secondary-title><style face="normal" font="default" size="100%">Key Engineering Materials</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036432225&amp;partnerID=40&amp;md5=4fac5ab5a508bad2f6a93846618e74ba</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">230-232</style></volume><pages><style face="normal" font="default" size="100%">357-360</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Hall effect measurements are one of the most powerful techniques for obtaining information about the conduction mechanism in polycrystalline semiconductor materials, which is the basis for understanding semiconductor gas sensors. In order to investigate the correlation between the microscopic characteristics and the macroscopic performances exhibited by undoped tin oxide gas sensors deposited by spray pyrolysis, Hall effect measurements were performed at different temperatures, from room temperature up to 500 K, and in the presence of two different atmospheres, air and methane. From these measurements, it was possible to infer the potential barrier and its dependence with the used atmosphere. The obtained results were analysed in terms of the oxygen mechanism at grain boundaries on the basis of the grain boundary-trapping model. In the presence of methane gas, the electrical resistivity decreases due to the lowering of the inter-grain boundary barrier height.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 1&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Mei, S.</style></author><author><style face="normal" font="default" size="100%">Yang, J.</style></author><author><style face="normal" font="default" size="100%">R. Monteiro</style></author><author><style face="normal" font="default" size="100%">Martins, R.</style></author><author><style face="normal" font="default" size="100%">Ferreira, J.M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Synthesis, characterization, and processing of cordierite-glass particles modified by coating with an alumina precursor</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of the American Ceramic Society</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036346830&amp;partnerID=40&amp;md5=1d6c31c9990a13c7977f4309d04bcc1c</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">1</style></number><volume><style face="normal" font="default" size="100%">85</style></volume><pages><style face="normal" font="default" size="100%">155-160</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The surfaces of cordierite and glass particles were modified by coating them with an alumina precursor using a precipitation process in the presence of urea. Scanning electron microscopy (SEM), high-resolution transmission electron microscopy, X-ray diffraction, electrophoresis, and rheological measurements were used to characterize the coated powders. SEM and transmission electron microscopy morphologies of the coated powders revealed that amorphous and homogeneous coatings have been formed around the particles. The morphology of the coated powders showed a coiled wormlike surface. The coating Al2O3 layer dominated the surface properties of the coated glass and cordierite powders. The influence of the coating layer on the processing ability of cordierite-based glass-ceramics substrates by tape casting was studied in aqueous media. It could be concluded that the coating of the powders facilitates the processing and yields green and sintered tapes with denser, more homogeneous microstructures compared with the uncoated powders.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 6&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lima, M.M.</style></author><author><style face="normal" font="default" size="100%">R. Monteiro</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Characterisation and thermal behaviour of a borosilicate glass</style></title><secondary-title><style face="normal" font="default" size="100%">Thermochimica Acta</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2001</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035369337&amp;doi=10.1016%2fS0040-6031%2801%2900456-7&amp;partnerID=40&amp;md5=c572336daccb3e60b67b9e39817a575a</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">1-2</style></number><volume><style face="normal" font="default" size="100%">373</style></volume><pages><style face="normal" font="default" size="100%">69-74</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The changes occurring during the heating of a borosilicate glass have been investigated by differential thermal analysis, dilatometric analysis and thermomechanical analysis. The thermal properties of this glass, such as glass transition temperature, dilatometric softening temperature and linear thermal expansion coefficient, have been determined. Viscosity measurements in the temperature range 898-1048 K were performed in a thermomechanical analyser equipped with a penetration attachment for isothermal measurement, and from the temperature dependence of viscosity a value of 290 kJ mol-1 was obtained for the activation energy for viscous flow. Devitrification of the glass was observed, specifically in finely powdered glass samples, where the precipitation of cristobalite was identified by X-ray diffraction. Glass powder compacts sintered by viscous flow and cristobalite precipitation reduced strongly the shrinkage rate. © 2001 Elsevier Science B.V.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 44&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Leroy, C.a</style></author><author><style face="normal" font="default" size="100%">Ferro, M.C.a</style></author><author><style face="normal" font="default" size="100%">Monteiro, R.C.C.b</style></author><author><style face="normal" font="default" size="100%">Fernandes, M.H.V.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Production of glass-ceramics from coal ashes</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of the European Ceramic Society</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2001</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035254041&amp;doi=10.1016%2fS0955-2219%2800%2900193-X&amp;partnerID=40&amp;md5=7ac3a6c6b5207198517014972230dc2c</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">21</style></volume><pages><style face="normal" font="default" size="100%">195-202</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Coal fly ashes produced by an extinguished power plant in the north of Portugal have been melted with addition of CaCO3 and Na2CO3 to obtain glasses. One of the formulated compositions was selected for further studies and it was possible to manufacture glass-ceramics by crystallizing the parent glass through adequate time-temperature schedules. The macroscopic appearance, microstructure, mechanical, thermal and chemical properties indicated that these materials are quite attractive for cladding applications, exhibiting in some cases better performances than the conventional ceramic tiles.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 90&lt;/p&gt;
</style></notes></record><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Monteiro, R. C. C.</style></author><author><style face="normal" font="default" size="100%">Glasser, F.P.</style></author><author><style face="normal" font="default" size="100%">Lachowski, E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Crystallization of CaO-Al2O3-SiO2 and CaO-MO-Al2O3-SiO2 (M=Mg, Zn) glasses</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Materials Science</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1989</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0024714404&amp;doi=10.1007%2fBF02385635&amp;partnerID=40&amp;md5=d148d94026bcb3d8e6840523a6ec37e0</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">8</style></number><volume><style face="normal" font="default" size="100%">24</style></volume><pages><style face="normal" font="default" size="100%">2839-2844</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A range of CaO-Al2O3-SiO2 glasses have been prepared by fusion of pure starting materials in platinum crucibles. Compositions containing large amounts on network formers, Al2O3 and SiO2, are difficult to crystallize. If the amount of network former is reduced, glasses will self-nucleate and crystallize more readily, but the products of crystallization tend to react with water. This conflict has been partly resolved by adding MgO and ZnO and tailoring compositions so as to produce a phase, variously designated &quot;Q&quot; or &quot;pleochroite&quot;, ideally Ca20Al32-2 vMg vSivO68, with v close to 4. Pleochroite crystallizes with a typically fibrous morphology. Preliminary experiments on fragments and melt-cast glass rods indicate that these compositions can be heat treated without deformation to yield highly crystalline, transparent ceramics. © 1989 Chapman and Hall Ltd.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 7&lt;/p&gt;
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