DIELECTRIC-PROPERTIES OF PB(FE1/2NB1/2)O-3-BASED CERAMICS

被引：33
|
作者：
ICHINOSE, N
KATO, N
机构：
[1] Department of Materials Science and Engineering, School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, 169
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1994年 / 33卷 / 9B期
关键词：
LEAD IRON NIOBATE; RELAXER FERROELECTRIC; DIELECTRIC CONSTANT; PYROELECTRIC CURRENT; SPACE-CHARGE POLARIZATION;
D O I：
10.1143/JJAP.33.5423
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A broad peak above the Curie temperature of lead iron niobate Pb(Fe1/2Nb1/2)O-3 may be related to interfaces at the grain boundary. The origin of the anomalous second peak is not clear. The Sr-substituted lead iron niobate Pb1-xSrx(Fe1/2Nb1/2)O-3 ceramics were prepared for the purpose of investigating this anomaly. The dielectric anomaly and pyroelectric current in this system at around 200 degrees C may be explained by the space-charge polarization in the interfaces of the grain boundary due to ionic valence changes from Fe3+ to Fe2+ in the B-site of the perovskite structure.
引用
收藏
页码：5423 / 5426
页数：4
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