Piezoelectric and ferroelectric properties of Bi-compensated (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 lead-free piezoelectric ceramics

被引：125

作者：

Zhang, Ya-Ru ^{[1
,2
]}

Li, Jing-Feng ^{[1
]}

Zhang, Bo-Ping ^{[2
]}

Peng, Chun-E ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 07期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2902805

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

(Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 (BNT-BKT) ceramics as a promising candidate for lead-free piezoelectric ceramics were studied with a special emphasis on the compositional dependence of piezoelectric and ferroelectric properties. One mole percent excess Bi was added to compensate for the volatilization of Bi3+ ions during sintering, which was found to be effective in improving the piezoelectric properties of the resultant BNT-BKT ceramics. The piezoelectric, ferroelectric, and dielectric properties of the Bi-compensated BNT-BKT ceramics were investigated and discussed in relation to the morphotropic phase boundary that is close to the composition range of 20-24 mol % BKT. The maximum piezoelectric constant d(33) (207 pC/N) and electromechanical coupling factor k(p) (35%) were obtained at the compositions of 23% and 20%, respectively. (C) 2008 American Institute of Physics.

引用

页数：6

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