ANALYSIS OF ELECTROLYTE POLARIZATION IN POLYCRYSTALLINE SODIUM BETA''-ALUMINA BY A COMPLEX ADMITTANCE METHOD

被引：27

作者：

JAKUBOWSKI, W

WHITMORE, DH

机构：

[1] NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60201

[2] NORTHWESTERN UNIV,CTR MAT RES,EVANSTON,IL 60201

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1979年 / 62卷 / 7-8期

关键词：

D O I：

10.1111/j.1151-2916.1979.tb19084.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The polarization behavior of lithia‐stabilized sodium β‐alumina in the form of polycrystalline pressed and sintered specimens was studied at 100° to 400°C by observing the isothermal values of the complex admittance from ≊5 Hz to 500 kHz. Analyzing these data in the complex admittance plane in terms of an equivalent circuit for the system made it possible, when ion‐blocking electrodes were used, to distinguish the separate contributions of the grain boundaries and the bulk crystals to the total electrolyte resistance. These results gave activation energies of 0.32 to 0.41 eV for the grain‐boundary resistance and 0.11 to 0.14 eV for the bulk resistance. The prefactors in the Arrhenius expressions for these resistances appeared to be more sensitive to factors such as specimen composition, microstructure, and specimen preparation conditions than are the activation energies. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：381 / 385

页数：5

共 30 条

[1]

ARMSTRONG RD, 1973, J ELECTROANAL CHEM, V44, P157, DOI 10.1016/S0022-0728(73)80243-8

[2] STUDY OF SOLID ELECTROLYTE POLARIZATION BY A COMPLEX ADMITTANCE METHOD [J].