Analysis of AC electrical properties of (Li and Ti)-doped NiO

被引：22
作者：
Wu, JB
Nan, J
Nan, CW [1 ]
Lin, Y
Deng, Y
Zhao, S
机构：
[1] Tsing Hua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
[2] Jiamusi Univ, Sch Mat Engn, Jiamusi 154007, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2003年 / 99卷 / 1-3期
关键词：
impedance spectroscopy; NiO; effective circuit; CPE;
D O I：
10.1016/S0921-5107(02)00552-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
(Li and Ti)-doped NiO samples were prepared by the citrate precursor method followed by a sintered process, and impedance spectroscopy (IS) of these samples was measured as a function of frequency and temperature. Accordingly, the impedance spectra exhibit two depressed semicircles when the Ti content is more than 5 mol.%, which is corresponding to the core-shell microstructure. The simple resistor-capacitor (RC) effective circuit and the modified effective circuit (the capacitor in the RC circuit is replaced by a constant-phase element (CPE)) were used to fit the experimental data. And it is indicated that the CPE element is an effective tool to analyze IS. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：294 / 297
页数：4
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