Effects of A-Site Sm Substitution and Textured Structure on Electric Properties of CaBi2Nb2O9-Based High-Curie-Temperature Ceramics

被引:43
作者
Chen, Huanbei [1 ]
Zhai, Jiwei [1 ]
Guo, Xiangxin [2 ]
Cui, Zhonghui [2 ]
机构
[1] Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
基金
中国国家自然科学基金;
关键词
DIELECTRIC-PROPERTIES; MICROSTRUCTURE;
D O I
10.1111/ijac.12082
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
CaBi2Nb2O9 ceramic is a promising candidate for high-temperature piezoelectric applications due to its high Curie temperature. However, extremely low piezoelectric properties hinder its application. A combination of Sm3+ donor doping and texturing was applied to address this problem. Piezoelectric coefficient, T-c, and resistivity of textured Ca0.95Sm0.05Bi2Nb2O9 ceramics (d(33)=23pC/N, T-c=941 degrees C, =4.1x10(5)cm at 600 degrees C) were obviously higher than those of pure random CaBi2Nb2O9 ceramics (d(33)=6, T-c=930 degrees C, =0.6x10(5)cm at 600 degrees C). Furthermore, it had excellent resistance to depolarization property, with k(p) of about 5.9% until 600 degrees C.
引用
收藏
页码:E151 / E158
页数:8
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