Donor and acceptor doping effects on the electrical conductivity of CaBi2Nb2O9 ceramics

被引：18

作者：

Chen, Huanbei ^{[1
]}

Guo, Xiangxin ^{[2
]}

Cui, Zhonghui ^{[2
]}

Zhai, Jiwei ^{[1
]}

机构：

[1] Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China

[2] Chinese Acad Sci, State Key Lab High Performance Ceram & Superfine, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2013年 / 210卷 / 06期

基金：

中国国家自然科学基金;

关键词：

acceptors; calcium bismuth niobate; ceramics; donors; doping; resistivity; PIEZOELECTRIC PROPERTIES; MICROSTRUCTURE;

D O I：

10.1002/pssa.201228804

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of donor dopants and acceptor dopants (A and B sites) on the resistivity of CaBi2Nb2O9 (CBN) ceramics were studied. The results indicate that the dominant conduction mechanism of pure CBN is p-type. When the donor doping amount x<0.05 on A site and x<0.02 on B site, the resistivity increased with increasing donor doping. With a further increase of donor doping, the resistivity decreased since conductivity mechanism changes from p-type to n-type. The resistivity with acceptor doping is decreased at low temperature and equal to the pure CBN ceramic at high temperature since the resistivity of the grain boundary decreases. This work provides a way to obtain high-resistivity CBN ceramics by appropriate donor doping, which is benefit for use in high-temperature piezoelectrics.

引用

页码：1121 / 1127

页数：7

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