Ferroelectric, dielectric properties and large strain response in Zr-modified (Bi0.5Na0.5)TiO3-BaTiO3 lead-free ceramics

被引：37

作者：

Jin, C. C. ^{[1
]}

Wang, F. F. ^{[1
]}

Yao, Q. R. ^{[1
]}

Tang, Y. X. ^{[1
]}

Wang, T. ^{[1
]}

Shi, W. Z. ^{[1
]}

机构：

[1] Shanghai Normal Univ, Math & Sci Coll, Key Lab Optoelect Mat & Device, Shanghai 200234, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Electrical properties; Dielectric properties; Ferroelectric properties; Actuators; PHASE;

D O I：

10.1016/j.ceramint.2013.11.066

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：

In the present work, temperature and composition dependence of dielectric, ferroelectric, piezoelectric properties of the (Bi0.5Na0.5)(0.93)-Ba0.07Ti1-xZrxO3 lead-free ceramics were systematically investigated and a schematic phase diagram was proposed. It was found that the Zr substitution caused the crystal lattice distortion, leading to a structural evolution from the ferroelectric long-range-order to relaxor pseudocubic structures characterized by the decreased depolarization temperature, ferroelectric remnant polarization, quasi-static piezoelectric coefficient, and electromechanical response. Results indicated that at a critical composition x of 0.014, large strain response could be obtained with the normalized strain S-max/E-max as high as 573 pmN under a moderate field of similar to 4 kV/mm at room temperature. The large strain response with enhanced temperature stability would be quite suitable for environmental-friendly solid-state actuators. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：6143 / 6150

页数：8

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