Conductivity of A- and B-site doped LaAlO3, LaGaO3, LaScO3 and LaInO3 perovskites

被引：224

作者：

Lybye, D ^{[1
]}

Poulsen, FW ^{[1
]}

Mogensen, M ^{[1
]}

机构：

[1] Riso Natl Lab, Dept Mat Res, DK-4000 Roskilde, Denmark

来源：

SOLID STATE IONICS | 2000年 / 128卷 / 1-4期

关键词：

oxide ion conductivity; perovskite; LaGaO3; LaScO3; LaAlO3;

D O I：

10.1016/S0167-2738(99)00337-9

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 conductivity of the materials LaAlO3, LaGaO3, LaScO3 and LaInO3 all doped with 10% strontium on the A-site and 10% magnesium at the B-site has been measured at different temperatures and oxygen partial pressures. The doped LaGaO3 is found to be an almost pure ionic conductor with a conductivity of 95 mS/cm at 800 degrees C. The conductivity of doped LaGaO3, decreases with time due to precipitation of a secondary phase. The doped LaAlO3 and LaScO3 are mixed conductors in oxidising atmosphere. Their ionic conductivities at 800 degrees C are 1.3 and 0.5 mS/cm, respectively. The conductivities given are total conductivities. The large difference in the conductivities of the investigated materials seems to be caused partly by grain boundary resistance. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：91 / 103

页数：13

共 34 条

[1] THE ELECTROLYTIC PROPERTIES OF LAYO3 AND LAALO3 DOPED WITH ALKALINE-EARTH OXIDES [J].