DIELECTRIC AND PIEZOELECTRIC AGING OF PURE AND NB-DOPED BATIO3 CERAMICS

被引：4
|
作者：
FERNANDEZ, JF
DURAN, P
MOURE, C
机构：
[1] Instituto de Cerámica y Vidrio, CSIC, Electroceramics Department, Madrid
来源：
FERROELECTRICS | 1990年 / 106卷
关键词：
D O I：
10.1080/00150199008214613
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pure and 0.8 at % Nb-doped BaTiO3 were sintered between 1175 and 1250°C. Structural, microstructural and electrical properties were determined. A.c. conductivity and electromechanical coefficients were measured in as-prepared samples and at different time intervals until a year after. In pure BaTiO3 the aging process increases the bulk and grain boundary resistivity. Samples, poled near the Curie temperature, showed an anomalous aging effect on k. In Nb-doped samples, a decrease in the grain boundary resistivity was observed after one year aging. An exceptionally high thickness coupling factor of 0.62 was found in as-poled samples, which strongly decreased with time. © 1990, Taylor & Francis Group, LLC. All rights reserved.
引用
收藏
页码：381 / 386
页数：6
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