Microstructure basis for strong piezoelectricity in Pb-free Ba(Zr0.2Ti0.8)O3-(Ba0.7Ca0.3)TiO3 ceramics

被引：233

作者：

Gao, Jinghui ^{[1
,3
]}

Xue, Dezhen ^{[1
,2
,3
]}

Wang, Yu ^{[1
]}

Wang, Dong ^{[1
,2
]}

Zhang, Lixue ^{[1
,2
]}

Wu, Haijun ^{[1
,2
]}

Guo, Shengwu ^{[2
]}

Bao, Huixin ^{[1
,2
]}

Zhou, Chao ^{[1
]}

Liu, Wenfeng ^{[1
]}

Hou, Sen ^{[1
,2
]}

Xiao, Ge ^{[1
,2
]}

Ren, Xiaobing ^{[1
,3
]}

机构：

[1] Xi An Jiao Tong Univ, Multidisciplinary Mat Res Ctr, Frontier Inst Sci & Technol, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[3] Natl Inst Mat Sci, Ferro Phys Grp, Tsukuba, Ibaraki 3050047, Japan

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 09期

基金：

中国国家自然科学基金;

关键词：

LEAD-FREE PIEZOCERAMICS; SINGLE-CRYSTALS; SOLID-SOLUTION; PHASE; FERROELECTRICS; POLARIZATION; BOUNDARY;

D O I：

10.1063/1.3629784

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, we use transmission electron microscopy to study the microstructure feature of recently reported Pb-free piezoceramic Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 across its piezoelectricity-optimal morphotropic phase boundary (MPB) by varying composition and temperature, respectively. The domain structure evolutions during such processes show that in MPB regime, the domains become miniaturized down to nanometer size with a domain hierarchy, which coincides with the d(33)-maximum region. Further convergent beam electron diffraction measurement shows that rhombohedral and tetragonal crystal symmetries coexist among the miniaturized domains. Strong piezoelectricity reported in such a system is due to easy polarization rotation between the coexisting nano-scale tetragonal and rhombohedral domains. (C) 2011 American Institute of Physics. [doi:10.1063/1.3629784]

引用

页数：3

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