Oxide-ion conductivity of the perovskite-type solid-solution system, (Ba1-x-ySrxLay)2In2O5+y

被引:52
作者
Kakinuma, K
Yamamura, H
Haneda, H
Atake, T
机构
[1] Kanagawa Univ, Fac Engn, Dept Appl Chem, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
[3] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan
关键词
ionic conduction; diffusion in solids; self-diffusion and ionic conduction in nonmetals; transport properties;
D O I
10.1016/S0167-2738(02)00495-2
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 oxide-ion conductivity and crystal structure of the perovskite-type (Ba1-x-ySrxLa5+y)(2)In2O5+y solid-solution system, which was derived from Ba2In2O5 with a brownmillerite-type structure, were investigated as a function of temperature and oxygen partial pressure. The oxide-ion conductivity was discussed from the viewpoint of the unit cell free volume. The oxide-ion transport number approached unity with increasing La content and the ion conductivity increased with the La or Sr content. The oxide-ion conductivity (1073 K) of (Ba0.3Sr0.2La0.5)(2)In2O5.5 exhibited a maximum value of 0.12 (S/cm), which exceeded that of yttria-stabilized zirconia. It was found that the oxide-ion conductivity of the present system was dominated by both the unit cell free volume and the amount of mobile oxide ion. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:571 / 576
页数:6
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