THE IONIC-CONDUCTIVITY OF (AG, NA)-NITRITE SODALITES

被引：11

作者：

JIANG, MRM ^{[1
]}

WELLER, MT ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON,DEPT CHEM,SOUTHAMPTON SO9 5NH,HANTS,ENGLAND

来源：

SOLID STATE IONICS | 1991年 / 46卷 / 3-4期

关键词：

D O I：

10.1016/0167-2738(91)90236-5

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：

Ionic conductivity data for mixed Ag/Na-nitrite sodalites, Ag(x)Na8-x(AlSiO4)6(NO2)2, have been determined over the temperature range 250 to 550-degrees-C in ambient atmosphere using an ac impedance method. The activation energy for conduction is reported for five samples with silver contents ranging from x = 0 to 7.5 and was found to be a monotonic function of silver content, with a minimum at the highest silver content. Conductivity isotherms for the mixed Ag/Na nitrite sodalites were constructed, showing a direct relationship of total ionic conductivity as a function of silver content, with fastest ionic motion at the highest silver content. A transition of conduction mechanism from Na+ ion predominance to Ag+ ion predominance with increasing x was confirmed from variations in the interfacial impedance characteristics. Ionic conductivity of nitrite sodalites is strongly dependent upon the ionic radius of the mobile cations incorporated.

引用

页码：341 / 345

页数：5

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