Morphotropic phase boundary and piezoelectric properties of (Bi1/2Na1/2)1-x(Bi1/2K1/2)xTiO3-0.03(Na0.5K0.5)NbO3 ferroelectric ceramics

被引：42
作者：
Yao, Zhonghua [1 ]
Liu, Hanxing [1 ]
Chen, Lei [1 ]
Cao, Minghe [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
来源：
MATERIALS LETTERS | 2009年 / 63卷 / 05期
关键词：
Ferroelectrics; Piezoelectric materials; Lead-free; Relaxor; MPB; DIELECTRIC-PROPERTIES; SYSTEM;
D O I：
10.1016/j.matlet.2008.11.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Lead-free piezoelectric ceramics, (Bi1/2Na1/2)(1-x)(Bi1/2K1/2)(x)TiO3-0.03(Na0.5K0.5)NbO3 (x=0.10-0.40) were synthesized by conventional solid-state sintering. A morphotropic phase boundary (MPB) between rhombohedral and tetragonal phases was confirmed. Two dielectric anomalies can be observed, showing diffused phase transition behavior. There is no shift of the dielectric maximum temperature with frequency due to the contribution of space charge at high temperatures, similar to pure (Bi1/2Na1/2)TiO3. The materials near MPB show a strong compositional dependence with the optimal properties of a d(33) of 167 pC/N, a k(p) of 35.5%, a P-r of 27.6 mu C/cm(2) and a E-c of 27.9 kV/cm, suitable for future application. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：547 / 550
页数：4
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