Depolarization temperature and piezoelectric properties of (Bi1/2Na1/2)TiO3-(Bi1/2Li1/2)TiO3-(Bi1/2K1/2)TiO3 lead-free piezoelectric ceramics

被引：46

作者：

Hiruma, Yuji ^{[1
]}

Nagata, Hajime ^{[1
]}

Takenaka, Tadashi ^{[1
]}

机构：

[1] Tokyo Univ Sci, Fac Sci & Technol, Dept Elect Engn, Chiba 2788510, Japan

来源：

CERAMICS INTERNATIONAL | 2009年 / 35卷 / 01期

基金：

日本学术振兴会;

关键词：

Piezoelectric properties; Morphotropic phase boundary; Depolarization temperature; Lead-free piezoelectric ceramics; PHASE-TRANSITION TEMPERATURES;

D O I：

10.1016/j.ceramint.2007.10.023

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 phase transition temperature and piezoelectric properties of x(Bi1/2Na1/2)TiO(3-)y(Bi1/2Li1/2)TiO3-z(Bi1/2K1/2)TiO3 [x + y + z = 1] (abbreviated as BNLKT100y-100z) ceramics were investigated. BNLKT100y-100z ceramics were prepared by conventional ceramic fabrication. The depolarization temperature T-d was determined by the temperature dependence of the dielectric and piezoelectric properties. This study focuses on the effect of Li1+ and K1+ ions on T-d and the piezoelectric properties of BNT ceramics. BNLKT100y-100z (y = 0-0.08) has a morphotropic phase boundary (MPB) between rhombohedral and tetragonal phases at z = 0.18-0.20, and high piezoelectric properties were obtained at the MPB composition. The piezoelectric constant d(33) increased with increasing y; however, T-d decreased above y = 0.06. The d(33) and T-d values of BNLKT4-20 and BNLKT8-20 were 176 pC/N and 171 degrees C, and 190 pC/N and 115 degrees C, respectively. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：117 / 120

页数：4

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