Highly Conducting Redox Stable Pyrochlore Oxides

被引：23

作者：

Deng, Z. Q. ^{[1
]}

Niu, H. J. ^{[1
]}

Kuang, X. J. ^{[1
]}

Allix, M. ^{[1
]}

Claridge, J. B. ^{[1
]}

Rosseinsky, M. J. ^{[1
]}

机构：

[1] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 22期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1021/cm800648z

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(2)B(2)O(7) complex oxides with the pyrochlore structure feature a wide variety of chemical compositions and corresponding diverse electrical and physical properties. A new pyrochlore, Yb0.96Ca1.04TiNbO6.98, is reported and characterized in terms of structural stability and electrical properties. The material is stable to similar to 1450 degrees C in 5% H-2/N-2 and has a high electronic conductivity in a reducing atmosphere, e.g., 9 S/cm at 800 degrees C in 5% H-2/N-2 after high-temperature reduction. Other cation substitutions enhance the low-temperature kinetics of conductivity response to changes in oxygen partial pressure.

引用

页码：6911 / 6916

页数：6

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