Thermodynamics and kinetics of the ion exchange of sodium with cadmium in beta-aluminas

被引：0

作者：

Staikov, G. ^{[1
]}

Nikolov, V. ^{[1
]}

Yankulov, P.D. ^{[1
]}

机构：

[1] Bulgarian Acad of Sciences, Bulgaria

来源：

Solid State Ionics | 1988年 / 28-30卷

关键词：

Ceramic Materials--Ionic Conduction - Chemical Reactions--Reaction Kinetics - Crystals--Structure - Electric Conductivity--Composition Effects - Ion Exchange--Thermodynamics;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The kinetics and thermodynamics of the exchange of Na+ with Cd2+ in polycrystalline beta aluminas with different phases and chemical compositions are studied. The results obtained are compared with those for single crystals. The rate of the ion exchange increases with the rise of the β″-phase content in the ceramics. In contrast to the single crystals, a yellow-brown coloration is observed in polycrystalline materials. The NaAlO2 which is usually present in the ceramics also undergoes an ion exchange. The thermodynamic studies show that the β″-phase is a better host for the Cd2+ than β-Al2O3.

引用

页码：373 / 376