Dielectric and piezoelectric properties of hydroxyapatite-BaTiO3 composites

被引：72

作者：

Bowen, C. R. ^{[1
]}

Gittings, J.

Turner, I. G.

Baxter, F.

Chaudhuri, J. B.

机构：

[1] Univ Bath, Dept Mech Engn, Mat Res Ctr, Bath BA2 7AY, Avon, England

[2] Univ Bath, Dept Chem Engn, Ctr Regenerat Med, Bath BA2 7AY, Avon, England

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 13期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1063/1.2355458

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This letter describes the relationships between the composition and the dielectric and piezoelectric properties of hydroxyapatite-barium titanate composites for polarized bone substitutes. The ac conductivity and permittivity were characterized from 0.1 Hz to 1 MHz, along with measurements of the d(33) piezoelectric charge coefficient. The addition of BaTiO3 led to an increase in permittivity and ac conductivity of the material. The increase in both properties was attributed to the presence of the high permittivity ferroelectric phase. The d(33) and g(33) coefficients decreased rapidly as hydroxyapatite was introduced into BaTiO3 material. Composites below 80% by volume of BaTiO3 exhibited no net piezoelectric effect. (c) 2006 American Institute of Physics.

引用

页数：3

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