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
收藏
页码：1169 / 1172
页数：4
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