Structure, ferroelectric properties, and electric field-induced large strain in lead-free Bi0.5(Na,K)0.5TiO3-(Bi0.5La0.5)AlO3 piezoelectric ceramics

被引：33

作者：

Ullah, Aman ^{[1
]}

Ahn, Chang Won ^{[2
]}

Lee, Sun Young ^{[1
]}

Kim, Jin Soo ^{[1
]}

Kim, Ill Won ^{[1
]}

机构：

[1] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea

[2] KETI, Convergence Components R&D Div, Songnam 463816, South Korea

来源：

CERAMICS INTERNATIONAL | 2012年 / 38卷

基金：

新加坡国家研究基金会;

关键词：

Powder solid state reaction; Sintering; Ferroelectric properties; Piezoelectric properties; MORPHOTROPIC PHASE-BOUNDARY; TEMPERATURE; SYSTEM;

D O I：

10.1016/j.ceramint.2011.05.013

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：

Lead-free (1 - x)Bi-0.5(Na0.78K0.22)(0.5)TiO3-x(Bi0.5La0.5)AlO3 (BNKT-BLA) piezoelectric ceramics with x ranging from 0 to 0.030 were synthesized by a conventional solid state reaction method. The effect of (Bi0.5La0.5)AlO3 addition on the structure, ferroelectric properties, and electric field-induced strain were investigated. In the studied composition range, the XRD patterns revealed a single perovskite phase with tetragonal symmetry. However, the tetragonality (c/a) of the BNKT ceramics significantly decreased as the BLA content was increased. The polarization and strain hysteresis loops indicate that the ferroelectric order of the BNKT ceramics was significantly disrupted by the addition of BLA, leading to degradation in the remnant polarization and coercive field. However, the destabilization of the ferroelectric order is accompanied by significant enhancements in the bipolar and unipolar strains. A large electric field-induced strain (S = 0.40%) and a corresponding normalized strain (d*(33) = S-max/E-max = 579 pm/V) were observed under 70 kV/cm at a composition of x = 0.010. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：S363 / S368

页数：6

共 28 条

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