Structure and dielectric properties of Cu and (K,Na) doped SrBi2Nb2O9 ferroelectric ceramics

被引：2

作者：

Fang, Pinyang ^{[1
]}

Fan, Huiqing ^{[1
]}

Liu, Laijun ^{[1
]}

Chen, Jin ^{[1
]}

Qiu, Shaojun ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Sch Mat Sci & Engn, Xian 710072, Peoples R China

来源：

JOURNAL OF ELECTROCERAMICS | 2009年 / 23卷 / 01期

基金：

高等学校博士学科点专项科研基金;

关键词：

Ferroelectric ceramics; Bi-layer structure perovskite; Doped SrBi2Nb2O9; MIXED BISMUTH OXIDES; LA;

D O I：

10.1007/s10832-008-9533-z

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：

Ferroelectric ceramics, SrBi2Nb2O9 (SBN), Sr0.8Cu0.2Bi2Nb2O9 (SCBN) and Sr0.8K0.1Na0.1Bi2Nb2O9 (SKNBN) were prepared by a solid state reaction process. X-ray diffraction analysis shows that the alkali and Cu almost diffuse into the SBN lattice to form a solid solution during sintering and some slight secondary phases was detected. The effect of alkali and Cu on dielectric properties of the SBN ceramics was discussed. The dielectric loss factor of (K,Na) doped SBN ceramics degraded considerably to 0.01 and their frequency and temperature stabilities were enhanced. The dielectric constant was enhanced by approximately 60% and the Curie temperature (Tc) was also improved for Cu doped SrBi2Nb2O9 ceramics.

引用

页码：52 / 55

页数：4

共 24 条

[1]

CROSS LE, 1987, FERROELECTRICS, V76, P241, DOI 10.2109/jcersj.99.829

[2] Influence of Bi-site substitution on the ferroelectricity of the Aurivillius compound Bi2SrNb2O9 [J].