Electrical poling below coercive field for large piezoelectricity

被引：76

作者：

Guo, Hanzheng ^{[1
]}

Ma, Cheng ^{[1
]}

Liu, Xiaoming ^{[1
]}

Tan, Xiaoli ^{[1
]}

机构：

[1] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 09期

基金：

美国国家科学基金会;

关键词：

FREE (1-X)(BI1/2NA1/2)TIO3-XBATIO(3) CERAMICS; LEAD-ZIRCONATE-TITANATE; POLARIZATION REVERSAL; BOUNDARY CRACKING; PHASE-TRANSITIONS; MICROSCOPY; FERROELECTRICS; TEMPERATURE; PERSPECTIVE;

D O I：

10.1063/1.4794866

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Isotropic polycrystalline ferroelectric ceramics have to be electrically poled to develop a net macroscopic polarization and hence piezoelectricity. It is well accepted that a sufficient poling can only be realized under an electric field that is much higher than the coercive field. In this study, we observed in (Bi1/2Na1/2)TiO3-BaTiO3 ceramics that large piezoelectricity can develop at poling fields far below the measured coercive field. Using in situ transmission electron microscopy, such an unusual behavior, is interpreted with the polarization alignment of polar nanodomains in the non-ergodic relaxor phase. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4794866]

引用

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