Influence of Bi excess and Sr deficient compositions on the microstructure and dielectric properties of Sr1-xBi2+yTa2O9 ferroelectric ceramics

被引：0

作者：

Hayashi, T ^{[1
]}

Sawayanagi, S ^{[1
]}

Hara, T ^{[1
]}

Takahashi, H ^{[1
]}

Ueno, S ^{[1
]}

机构：

[1] Shonan Inst Technol, Dept Mat & Ceram Tech, Kanagawa 251, Japan

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 1998年 / 32卷

关键词：

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The microstructural development and dielectric properties of Sr1-xBi2+yTa2O9 ferroelectric ceramics were investigated. Sr1-xBi2+yTa2O9 ceramic powders were prepared by solid state reaction between the corresponding oxides and carbonate, and sintered at 1250 degrees C for 2 h. Bismuth excess compositions promoted the grain growth to elongated and/or plate-like grains with (00l) orientation. The grain sizes of Sr1-xBi2+yTa2O9 ceramics decreased with increasing strontium deficient amount. Bi excess and Sr deficient compositions with Sr0.7Bi2.1Ta2O9 and Sr0.8Bi2.3Ta2O9 gave the best dielectric properties with the dielectric constant of 130, remanent polarization of 5.0 (mu C/cm(2)) and coercive field of 20 (kV/cm).

引用

页码：S1195 / S1197

页数：3

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