Impedance spectroscopy and dielectric properties of Na0.5Bi0.5TiO3-NaNbO3 ceramics

被引：48

作者：

Li, YM ^{[1
]}

Chen, W

Zhou, J

Xu, Q

Gu, XY

Liao, RH

机构：

[1] Jingdezhen Ceram Inst, Jingdezhen 333001, Jiangxi, Peoples R China

[2] Wuhan Univ Technol, Inst Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2005年 / 365卷 / 1-4期

基金：

中国国家自然科学基金;

关键词：

sodium bismuth titanate; impedance; dielectric properties; DPT;

D O I：

10.1016/j.physb.2005.04.039

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The frequency (100Hz-1MHz) and temperature (450-575 degrees C) dependence of impedance spectroscopy of (1 - x)Na0.5Bi0.5TiO3-xNaNbO(3) (x = O 0.02, 0.04, 0.06 0.08) system ceramics was investigated by the impedance analyzer. The effect of NaNbO3 concentration on the electrical properties of NBT was analyzed by the impedance data. The frequency explicit plots of Z '' versus frequency at various temperatures show peaks in the higher temperature range (>= 450 degrees C). The relaxation peaks are affected by the NaNbO3 concentration. The Arrhenius activation energies have been computed from the impedance data. From the investigations of dielectric properties as a function of temperature, it is observed that diffuse phase transition (DPT) is exhibited in these specimens. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：76 / 81

页数：6

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