Defect structure and electrical properties of La1-ySryFe1-xAlxO3-δ

被引：18

作者：

Kuscer, D ^{[1
]}

Hanzel, D ^{[1
]}

Holc, J ^{[1
]}

Hrovat, M ^{[1
]}

Kolar, D ^{[1
]}

机构：

[1] Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2001年 / 84卷 / 05期

关键词：

D O I：

10.1111/j.1151-2916.2001.tb00803.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

La1-ySryFe1-xAlxO3-delta perovskites were studied as potential materials for solid-oxide fuel cell (SOFC) cathodes. The phase relations in the LaFeO3-SrFeO3-delta-LaAlO3 system were investigated by X-ray powder diffraction analysis. The defect structure of the La1-ySryFe1-xAlxO3-delta perovskites was investigated by Mossbauer spectroscopy and weight-loss analysis. Relations between the nonstoichiometry and the conductivity of the La1-ySryFe1-xAlxO3-delta perovskites were investigated. The incorporation of aluminum (x) into LaFe1-xAlxO3 was found to have no influence on the defect structure but to decrease the conductivity. The incorporation of strontium OI) into La1-ySryFe1-xAlxO3-delta promotes the formation of anion vacancies and Fe4+ that lead to higher conductivity.

引用

页码：1148 / 1154

页数：7

共 17 条

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