Ferroelectric and piezoelectric properties of strontium bismuth tantalate ceramics

被引：5

作者：

Takeda, H ^{[1
]}

Fujioka, C ^{[1
]}

Aoyagi, R ^{[1
]}

Okamura, S ^{[1
]}

Shiosaki, T ^{[1
]}

机构：

[1] NAIST, Grad Sch Mat Sci, Ikoma, Nara 6300192, Japan

来源：

EURO CERAMICS VIII, PTS 1-3 | 2004年 / 264-268卷

关键词：

strontium bismuth tantalate; bismuth layered structured ferroelectrics; ferroelectricity; piezoelectricity;

D O I：

10.4028/www.scientific.net/KEM.264-268.1169

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：

The ferroelectric and piezoelectric properties of strontium bismuth tantalate SrxBiyTa2O9 (SrxBiyT) ceramics were investigated. Well developed P(polarization)- E(electric field) hysteresis loops were observed for all samples except for the Sr1.0BiyT(y>2) ceramics. A large remanent polarization (2P(r) = 26 muC/cm(2)) was observed for the Sr0.8Bi2.15T ceramics sintered at 1150degreesC. For the Sr0.8Bi2.2T ceramics, the determined electromechanical coupling factor (k(p) = 9.7%) and mechanical quality factor (Q(m) = 4500) with a radial-extensional mode were obtained. Those of the stoichiometric SBT ceramics are k(p) = 4.0%. The cation vacancy and/or Bi incorporation into the Sr site of SrBi2Ta2O9 were effective for enhancement of the electromechanical coefficients.

引用

页码：1169 / 1172

页数：4

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