氧离子导体La_2Mo_(2-x)W_xO_9的研究进展  

Research Status of the La_2Mo_(2-x)W_xO_9 Oxide-ion Conductors

作　　者：李丹[1] 李相虎[1] 方前锋[2] 

机构地区：[1]武汉工业学院数理系,湖北武汉430023 [2]中国科学院固体物理研究所材料物理重点实验室,安徽合肥230031

出　　处：《信阳师范学院学报（自然科学版）》2009年第4期635-640,共6页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(50672100);武汉工业学院科研启动基金项目

摘　　要：自2000年Lacorre等人报道了La2Mo2O9具有较高的氧离子电导率以来,La2Mo2O9基氧离子导体由于其优异的性能而受到人们的关注,特别是W替代的La2Mo2O9基氧离子导体材料.本文综述了氧离子导体La2Mo2-xWxO9的研究现状.主要介绍了氧离子导体La2Mo2-xWxO9的结构特征、氧离子扩散行为与相变机制、化学稳定性问题和氧离子电导率等性能.已有的研究结果表明,W替代的La2Mo2O9在化学稳定性和直流电导率方面比纯La2Mo2O9具有更好的优势,可望在固体氧化物燃料电池和氧传感器等方面得到广泛的应用,具有极大的发展潜力.La2Mo2 O9-based oxide-ion conductors have attracted more and more attention since it was reported having high ionic conductivity in 2000 by Lacorre et al. Especially the W-doped La2Mo2O9 oxide-ion conductors . In this paper the recent investigation on the La2Mo2-xWxO9 oxide-ion conductors is reviewed. It is focused on the structure, mechanism of oxygen vacancy diffusion and the phase transition, chemical stability, and oxide-ion conductivity in the La2Mo2-xWxO9 samples. It is pointed out that the W-doped La2Mo2O9 have better effect in the chemical stability and the direct current conductivity than the pure La2Mo2O9, it could be possibly applied in the fields such as solid oxide fuel cells, oxygen sensors, and have enormous developing potential.

关 键 词：氧离子导体 kM0209 电导率 相变 

分 类 号：TM911[电气工程—电力电子与电力传动]