Role of coexisting tetragonal regions in the rhombohedral phase of Na0.5Bi0.5TiO3-xat.%BaTiO3 crystals on enhanced piezoelectric properties on approaching the morphotropic phase boundary

被引：48

作者：

Yao, Jianjun ^{[1
]}

Monsegue, Niven ^{[2
]}

Murayama, Mitsuhiro ^{[1
,2
]}

Leng, Weinan ^{[2
]}

Reynolds, William T. ^{[1
]}

Zhang, Qinhui ^{[3
]}

Luo, Haosu ^{[3
]}

Li, Jiefang ^{[1
]}

Ge, Wenwei ^{[1
]}

Viehland, D. ^{[1
]}

机构：

[1] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

[2] Virginia Tech, Inst Crit Technol & Appl Sci, Blacksburg, VA 24061 USA

[3] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 01期

基金：

美国国家科学基金会;

关键词：

TRANSMISSION ELECTRON-MICROSCOPY; LEAD-FREE PIEZOCERAMICS; SINGLE-CRYSTALS; NA0.5BI0.5TIO3; CERAMICS; DIFFRACTION; TRANSITION; STRAIN;

D O I：

10.1063/1.3673832

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ferroelectric domain and local structures of Na0.5Bi0.5TiO3-xat.%BaTiO3 (NBT-x%BT) crystals for x = 0, 4.5, and 5.5 have been investigated by transmission electron microscopy. The results show that the size of polar nano-regions was refined with increasing xat. %BT. The tetragonal phase volume fraction, as identified by in-phase octahedral tilting, was found to be increased with BT. The findings indicate that the large electric field induced strains in morphotropic phase boundary compositions of NBT-x%BT originate not only from polarization rotation but also polarization extension. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3673832]

引用

页数：4

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