Dielectric properties of poled hydroxyapatite ceramics

被引：0
|
作者：
Takeda, H. [1 ]
Nakamura, S. [1 ]
Yamada, K. [1 ]
Tsuchiya, Toshio [1 ]
Yamashita, K. [1 ]
机构：
[1] Tokyo Medical and Dental Univ, Tokyo, Japan
来源：
Key Engineering Materials | 2000年 / 181卷
关键词：
Ceramic materials - Dissociation - Electric charge - Electric current measurement - Electric fields - Electric resistance - Hydrogen - Hysteresis - Ions - Oxygen - Permittivity - Polarization;
D O I：
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摘要：
Dielectric properties of hydroxyapatite (HAp) ceramics have been investigated. Dielectric constants, P-E hysteresis and electric resistance of HAp ceramics were characterized. The thermally stimulated depolarization current (TSDC) was measured using HAp ceramics polarized under dc fields of 1-5kV &middot cm-1 at 300-500°C for 1h. The remnant electric charge of poled HAp ceramics was calculated and compared with those of BaTiO3. The results of TSDC measurement suggested that OH- in HAp dissociated into oxygen and hydrogen ions by polarization treatment.
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页码：35 / 38
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