Trivalent ion conduction in molybdates having Sc2(WO4)3-type structure

被引：40

作者：

Imanaka, N ^{[1
]}

Ueda, T ^{[1
]}

Okazaki, Y ^{[1
]}

Tamura, S ^{[1
]}

Adachi, G ^{[1
]}

机构：

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

来源：

CHEMISTRY OF MATERIALS | 2000年 / 12卷 / 07期

关键词：

D O I：

10.1021/cm990591w

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：

A molybdate series with Sc-2(WO4)(3)-type structure, which has been demonstrated to be suitable for trivalent ion conduction, was prepared, and the trivalent ion conducting characteristics of this series were compared with those of the tungstate series. The ionic conductivities of the molybdate series become considerably higher in comparison to those of the tungstate series. Since the ionic radius of Mo6+ is smaller than that of W6+, the oxide anions that form a tetrahedron unit with Mo6+ ion form stronger bonds than those that form a tetrahedron unit with W6+. Stronger hexavalent cation and oxide anion bonding develops more suitable surroundings for trivalent ion migration in the Sca(WO4)(3)-type structure. The trivalent ion conducting properties in the molybdate solids were directly characterized by de electrolysis and EPMA measurements.

引用

页码：1910 / 1913

页数：4

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