The piezoelectric properties of La2O3 doped (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 ceramics

被引：0
|
作者：
Yoshii, K. [1 ]
Hiruma, Y. [1 ]
Suzuki, M. [1 ]
Nagata, H. [1 ]
Takenaka, T. [1 ]
机构：
[1] Tokyo Univ Sci, Fac Sci & Technol, Chiba 2788510, Japan
来源：
FERROELECTRICS | 2007年 / 358卷
关键词：
lead-free; bismuth sodium titanate; bismuth potassium titanate; lanthanum doped; piezoelectric properties; dielectric properties; depolarization temperature;
D O I：
10.1080/00150190701536978
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The piezoelectric properties of a solid solution, x(Bi1/2Na1/2)TiO3-(1-x)(Bi1/2K1/2) TiO3 + La2O3 y wt% [BNKTx + La2O3 y wt%; x = 0.50, 0.70, y = 0-0.6] were investigated, focusing on piezoelectric constant, d(33), and depolarization temperature, T-d. The dielectric constant increased With increasing La2O3 content (y). The highest electromechanical coupling factor, k(33) (0.493) and the highest d(33) (153 pC/N) was obtained in BNKT0.70 + La2O3 0.2wt%. The T-d of BNKT0.70 + La2O3 y wt% was almost the same with y = 0-0.3 at 210-220 degrees C and decreased with y >= 0.4. BNKT0.70 + La2O3 0.2 wt% (d(33) = 153 pC/N and T-d = 219 degrees C) is a good candidate for practical use in actuators.
引用
收藏
页码：1016 / 1020
页数：5
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