Trivalent ion conduction of the Sc2(WO4)3-Lu2(WO4)3 system

被引：25

作者：

Kobayashi, Y ^{[1
]}

Egawa, T ^{[1
]}

Tamura, S ^{[1
]}

Imanaka, N ^{[1
]}

Adachi, G ^{[1
]}

机构：

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

来源：

SOLID STATE IONICS | 1999年 / 118卷 / 3-4期

关键词：

trivalent; ion conductor; scandium; lutetium; Sc-2(WO4)(3)-type structure;

D O I：

10.1016/S0167-2738(98)00338-5

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：

The trivalent ionic conduction in the Sc-2(WO4)(3)-Lu-2(WO4)(3) solid solution, which possesses the Sc-2(WO4)(3)-type structure was investigated. The Sc site substitution in Sc-2(WO4)(3) for larger Lu3+ occurred completely and the cell volume of the solid solution linearly expanded with increasing the Lu content. The ionic conductivity of the solid solution system enhanced with increasing the Lu substitution of the Sc site in Sc-2(WO4)(3) up to 50 mol%. On the other hand, the conductivity decreased by replacing the Lu site in Lu-2(WO4)(3) for Sc3+ UP to 40 mol%. A discontinuity appeared in the relation between the ionic conductivity and the composition of the solid solution around 50-60 Lu mol% substitution of the Sc site in the Sc-2(WO4)(3)-type structure. The electrolysis results derive the conclusion that the solid solution is a Sc3+ and Lu3+ trivalent mixed conductor and the mainly conducting species is Sc3+ and Lu3+ below and above 50-60 Lu mol%, respectively. (C) 1999 Elsevier Science BN. All rights reserved.

引用

页码：325 / 330

页数：6

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