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
收藏
页码：6911 / 6916
页数：6
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