Microstructure and ferroelectric properties of Nb2O5-modified BiFeO3-BaTiO3 lead-free ceramics for energy storage

被引：155
作者：
Wang, Tong
Jin, Li [1 ]
Tian, Ye
Shu, Longlong
Hu, Qingyuan
Wei, Xiaoyong
机构：
[1] Xi An Jiao Tong Univ, Key Lab Minist Educ, Elect Mat Res Lab, Xian 710049, Peoples R China
来源：
MATERIALS LETTERS | 2014年 / 137卷
基金：
对外科技合作项目（国际科技项目）;
关键词：
Nb2O5; BaTiO3; BiFeO3; Ceramics; Energy storage and conversion; PIEZOELECTRIC PROPERTIES; DENSITY;
D O I：
10.1016/j.matlet.2014.08.133
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of Nb2O5 addition on microstructures, dielectric breakdown strength, and energy storage properties of BiFeO3-BaTiO3 (BF-BT) ceramics were investigated. X-ray diffraction patterns suggested a perovskite pseudocubic structure when the addition content was less than 3 mol%. The electrical resistivity of 1 mol% Nb2O5-doped BF-BT ceramic was increased by approximately six orders of magnitude compared to the corresponding undoped composition. The dielectric breakdown strength was enhanced with increasing Nb2O5 content and reached a maximum value at the composition with 3 mol% Nb2O5, with a maximum discharge energy density of 0.71 J/cm(3) at 90 kV/cm. This observation suggests that Nb-doped BF-BT ceramics can be considered as a potential lead-free system for energy storage applications. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：79 / 81
页数：3
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