CAUSES OF INSTABILITY AND AGING OF PIEZOELECTRIC POWER CERAMICS

被引:12
作者
EYRAUD, L [1 ]
GONNARD, P [1 ]
CLAUDEL, B [1 ]
机构
[1] INST NATL SCI APPL,CINET & GENIE CHIM LAB,F-69621 VILLEURBANNE,FRANCE
关键词
electrical properties; ferroelectric materials; lead zirconate titanate (PZT); perovskites; piezoelectric materials;
D O I
10.1111/j.1151-2916.1990.tb05234.x
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A simple model of substituted perovskites of the PZT type involving the presence of centers which can act both as donors and acceptors provides an explanation of the cancellation of space charge density (ρ=−div ) in polarized ceramics. A cause of instability can be avoided by incorporating substitutions in the cation lattice to form these centers and lock them in position. These substitutions insure the nonconductive state of the material although they allow a short‐range electron transfer between the centers. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
收藏
页码:1854 / 1856
页数:3
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