Madeira, R. M. D., T. Vieira, J. C. Silva, I. R. Oliveira, J. P. Borges, M. M. R. A. Lima, and C. M. Lança,
"Piezoelectric Calcium Modified Barium Titanate for Bone Regeneration",
Materials Proceedings 2022, Vol. 8, Page 121, vol. 8, no. 1, Basel Switzerland, Multidisciplinary Digital Publishing Institute, pp. 121, jul, 2022.
AbstractSolid state reaction was used to produced barium titanate modified with calcium (BCT) showing the presence of the piezoelectric tetragonal phase after sintering at 1350 °C. Bioglass 45S5 (BG) was synthetized by sol-gel route. From these two materials and commercial hydroxyapatite (HAp) were obtained composites. The BG produced showed some cytotoxic character that was weakened by passivation. All other materials were non-cytotoxic. Contact polarization at constant temperature was chosen composites polarization. Electric/dielectric properties were evaluated by thermally stimulated depolarization currents (TSDC). The material showed bioactivity with the composite with BCT/BG/HAp 90/5/5 (wt%) showing increased bioactivity. In vitro test showed high proliferation rates for the composites.
P, J., L. MC, M. - M. S. J, and R. J,
"Pore dimension of water trees in PE: NMR studies",
POLYMER, vol. 41: Univ Paris 11, Univ Nova Lisboa, Univ Paris 11, Univ Paris 11, pp. 8151-8154, Jan, 2000.
Abstractn/a
Judeinstein, P., M. C. Lanca, J. Marat-Mendes, and J. Rault,
"Pore dimension of water trees in PE: NMR studies",
Polymer, vol. 41, no. 22, pp. 8151-8154, 2000.
AbstractIn PE films aged under electric field the crystallisation of water (and melting of ice) has been studied by quadrupolar NMR, this technique allows one to determine the concentration of water as low as 10(-4). It is shown that the pore dimensions of the tracks forming the water trees of the order of 2.5 nm, are independent of the ageing time. The mobility of water in these water trees and in porous glass, of similar pore dimensions, are compared. (C) 2000 Elsevier Science Ltd. All rights reserved.
Judeinstein, P., M. C. Lanca, J. Marat-Mendes, and J. Rault,
"Pore dimension of water trees in PE: NMR studies",
Polymer, vol. 41, no. 22, pp. 8151-8154, 2000.
AbstractIn PE films aged under electric field the crystallisation of water (and melting of ice) has been studied by quadrupolar NMR, this technique allows one to determine the concentration of water as low as 10(-4). It is shown that the pore dimensions of the tracks forming the water trees of the order of 2.5 nm, are independent of the ageing time. The mobility of water in these water trees and in porous glass, of similar pore dimensions, are compared. (C) 2000 Elsevier Science Ltd. All rights reserved.
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