Ferroelectric properties of nanocrystalline barium titanate ceramics

被引：79

作者：

Deng, Xiangyun ^{[1
]}

Wang, Xiaohui ^{[1
]}

Wen, Hai ^{[1
]}

Chen, Liangliang ^{[1
]}

Chen, Lei ^{[1
]}

Li, Longtu ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 25期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2213508

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Dense nanocrystalline BaTiO3 ceramics with the average grain size of 20 nm obtained by spark plasma sintering were investigated. The dielectric data show a ferroelectric to paraelectric phase transition with a maximum permittivity of approximate to 930 at 115 degrees C and at 1 kHz. The polarization-reversal characteristics and the local ferroelectric switching behavior were measured; the typical piezoelectric hysteresis loops were recorded. The present results provide experimental evidence, indicating that if a critical grain size exists for ferroelectricity it is less than 20 nm for polycrystalline BaTiO3 ceramics. (c) 2006 American Institute of Physics.

引用

页数：3

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