期刊论文

中文

四川师范大学学报(自然科学版)

1001-8395

2012

35

3

370-372

10.3969/j.issn.1001-8395.2012.03.018

湖北省教育厅科学研究计划项目（Q20091802和Q20101705）资助项目；

本校为第一机构

采用固相反应法合成了氧离子导体La_2Mo_(2-y)Nb_yO_(9-δ)(y=0,0.1,0.2,0.3),通过XRD和介电测量对氧离子导体进行结构和导电性能分析,结果表明,Nb~(5+)在La_2Mo_2O_9中的固溶度小于0.15 mol,且不能抑制纯La_2Mo_2O_9的α/β相转变,同时La_2Mo_(2-y)Nb_yO_(9-δ)(y=0.1,0.2)的电导率比纯La_2Mo_2O_9略有提高,但提高的幅度不大,原因可能是Nb~(5+)的离子半径与Mo~(6+)相当,并且氧化状态也差别不大,因此并没有引入较多的氧空位,从而使得固溶度和电导率增加的幅度不大.

A various oxide-ion conductors La2Mo2-yNbyO9-δ（y=0,0.1,0.2,0.3） were prepared with solid-state reaction method.Their structures and ionic conductivities were characterized with XRD and dielectric measurements.The results show that the solubility of Nb^5＋ in La2Mo2O9 sample is smaller than 0.15 mol,and the Nb5＋ can not suppress the α/β transition in pure La2Mo2O9.The conductivity of La2Mo2-yNbyO9-δ（y=0.1,0.2） is a little higher than that of the pure La2Mo2O9.The reason may be the similar radius of Nb5＋ with Mo6＋ and the little differ...