Quantitative demonstration of Al3+ ion conduction in Al2(WO4)3 solids

被引：38

作者：

Kobayashi, Y ^{[1
]}

Tamura, S ^{[1
]}

Imanaka, N ^{[1
]}

Adachi, G ^{[1
]}

机构：

[1] Osaka Univ, Fac Engn, Dept Appl Chem, Osaka 5650871, Japan

来源：

SOLID STATE IONICS | 1998年 / 113卷

关键词：

aluminum tungstate; trivalent ion conductor; Al concentration cell; Sc-2(WO4)(3)-type structure;

D O I：

10.1016/S0167-2738(98)00320-8

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：

Ion conduction of trivalent aluminum in the aluminum tungstate, Al-2(WO4)(3), has been quantitatively demonstrated. The ionic conduction characteristics of Al-2(WO4)(3) were investigated by means of electrolysis and electromotive force (emf) measurement of an aluminum concentration cell by using three types of aluminum-platinum alloys, Al55Pt45, Al42Pt58, and Al35Pt65, as the electrodes. The DC electrolysis data strongly support the conclusion that ionic Al3+ is the mobile species in Al-2(WO4)(3). From emf measurements, the mobile species in Al-2(WO4)(3) was quantitatively identified as aluminum ion in a trivalent state. The conducting properties of the Al-2(WO4)(3)-In-2(WO4)(3) solid solution were investigated. The Al3+ ion conduction increased with the increase of the indium content until 80 mol.% content and the solid solution of 80 mol.% shows five times as high conductivity as pure Al-2(WO4)(3). In addition, a macroscopic ionic conduction of trivalent Al3+ in solids has been directly demonstrated. (C) 1998 Published by Elsevier Science BN. All rights reserved.

引用

页码：545 / 552

页数：8

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