NORMAL POLING AND HIGH POLING OF FERROELECTRIC CERAMICS AND SPACE-CHARGE EFFECTS

被引:16
|
作者
OKAZAKI, K
机构
[1] Department of Materials Science and Ceramic Technology, Shonan Institute of Technology, Fujisawa, 251
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1993年 / 32卷 / 9B期
关键词
NORMAL POLING; HIGH POLING; SPACE-CHARGE MODEL; SPACE-CHARGE STABILIZED EFFECT; PSEUDO-PYROELECTRIC CURRENT; ASYMMETRIC POLARIZATION REVERSAL;
D O I
10.1143/JJAP.32.4241
中图分类号
O59 [应用物理学];
学科分类号
摘要
Poling treatment of field application below Curie point of ferroelectric ceramics is termed ''normal poling'' and a dc field application above Curie point is termed ''high poling''. When a high poling is performed for BaTiO3 or (Sr, Ba)TiO3, a space-charge polarization (P2 type) in the direction of high poling field and an internal bias field E(-i) with the direction opposite to high poling field are generated. When a ferroelectric sample such as BaTiO3 and Pb(Zr, Ti)O3 are aged at temperatures below T, after normal poling, another space-charge polarization (-P2 type) in the direction opposite to that of the normal poling and the internal bias field E(i) with the same direction as that of normal poling field are generated. In this paper, two kinds of space-charge models in ferroelectric ceramics and related phenomena such as space-charge-stabilized effects on the electromechanical strength, the pseudo-pyroelectric current of high-poled (Sr, Ba) TiO3 and asymmetric polarization reversal caused by the -P2 effects will be reviewed and discussed.
引用
收藏
页码:4241 / 4244
页数:4
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