Electrical characterization of polycrystalline sodium β"-alumina: Revisited and resolved

被引：23

作者：

Kim, Jee-Hoon ^{[1
]}

Shin, Eui-Chol ^{[1
]}

Cho, Dong-Chun ^{[1
]}

Kim, Sooseok ^{[2
]}

Lim, Sansudae ^{[2
]}

Yang, Keedeok ^{[2
]}

Beum, Jinhyung ^{[2
]}

Kim, Jaekook ^{[1
]}

Yamaguchi, Shu ^{[3
]}

Lee, Jong-Sook ^{[1
]}

机构：

[1] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

[2] FineTech Co Ltd, Taejon 305510, South Korea

[3] Univ Tokyo, Dept Mat Engn, Tokyo 1138656, Japan

来源：

SOLID STATE IONICS | 2014年 / 264卷

关键词：

Sodium beta alumina; AC 4-probe method; Impedance spectroscopy; Cole-Davidson dielectric function; AC conductivity simulation; IONIC-CONDUCTIVITY; SOLID ELECTROLYTES; AC CONDUCTIVITY; DIELECTRIC LOSS; IMPEDANCE; MICROSTRUCTURE; TEMPERATURE; RELAXATION; MODELS; BETA''-ALUMINA;

D O I：

10.1016/j.ssi.2014.06.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

AC 4-probe method using Au electrodes distinguished the sample conductivity of polycrystalline beta" alumina at high temperature. Bode plots of AC 2-probe measurements revealed temperature-independent capacitance plateaus and the power-law frequency dependences, which can be described by Cole-Davidson dielectric equations. The relaxation time constants exhibit the same activation energy as the bulk conduction supporting CK1 model and current-constriction mechanism. An ideal Warburg response is identified regardless of the electrode condition. Well-defined parameters allow the simulation of AC behavior as a function of temperature as well as frequencies, which provides much informative overview of the AC characteristics of solid electrolytes. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：22 / 35

页数：14

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