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.
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收藏
页码：6143 / 6150
页数：8
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