Conductivity of alkali perchlorates at high temperatures

被引：9

作者：

Ulihin, A. S. ^{[1
]}

Uvarov, N. F. ^{[1
]}

Mellander, B. -E. ^{[2
]}

机构：

[1] Inst Solid State Chem & Mechanochem, Novosibirsk, Russia

[2] Chalmers, S-41296 Gothenburg, Sweden

来源：

SOLID STATE IONICS | 2008年 / 179卷 / 1-6期

关键词：

ionic conductivity; perchlorates; reorientation of anions; paddle-wheel mechanism;

D O I：

10.1016/j.ssi.2007.12.045

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 of high-temperature phases of alkaline metal perchlorates is studied. It is found that the conductivity passes through a minimum with increasing radius of cation, and KClO4 exhibits the lowest conductivity. This is explained by a decrease in the relative size of conduction channel, which hampers the cation transfer, and an increase in the relative free volume. The free-volume increase promotes the perchlorate anion reorientation and reduces the activation energy for ion transfer by the "paddle-wheel" mechanism, as a result, the conductivity increases. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：228 / 230

页数：3

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