Switching of morphotropic phase boundary and large electrostrictive effect in lead-free BNT-BKT-KNN ceramics

被引：22

作者：

Hao, Jigong ^{[1
]}

Wang, Jinwen ^{[1
]}

Bai, Wangfeng ^{[1
]}

Shen, Bo ^{[1
]}

Zhai, Jiwei ^{[1
]}

机构：

[1] Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China

来源：

PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2012年 / 6卷 / 11期

基金：

中国国家自然科学基金;

关键词：

ceramics; perovskites; morphotropic phase boundaries; electrostrictive properties; FREE PIEZOCERAMICS; SYSTEM; STRAIN;

D O I：

10.1002/pssr.201206270

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the phase diagram of the lead-free ternary (Bi0.5Na0.5)TiO3(Bi0.5K0.5)TiO3(K0.5Na0.5)NbO3 (BNTBKTKNN) system and study the switching characteristics of the morphotropic phase boundary (MPB). The addition of KNN intrinsically changes the structural nature of the system with shift of MPB type from (I) to (II), and also adjusts the depolarization temperature (T-d) to room temperature. Accordingly, a high electrostrictive response with large electrostrictive coefficient Q(33) (similar to 0.0220.027 m(4)/C-2) and a good thermostability comparable with that of traditional Pb-based electrostrictors was achieved in MPB (II) compositions. (c) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：451 / 453

页数：3

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