SOL-GEL SYNTHESIS AND ELECTRIC PROPERTY OF La2Mo2O9 BASED OXIDE IONIC CONDUCTORS

摘要：

Dense, crack-free and uniform La2-xAxMo2O9-δ(x=0, 0.05 and A=K, Ca, and Ba) and La2Mo2-yWyO9 (y=0.1, 0.2) nanocrystalline films were synthesized on poly-alumina substrates via a modified sol-gel method. The average grain size and thickness of La2Mo2O9 based films is in the range of 90-500 nm and 1-2m, respectively. Such doping elements in La2Mo2O9 could suppress the/phase transition and increase ionic conductivity below 580℃. For W-doped samples, the conductivity at 500℃ of W10 (y=0.1) and W20 (y=0.2) reaches 6.3 and 5.2×10-3, respectively. For samples doped at La sites the ionic conductivity at 500 ℃ of K5, Ca5 and Ba5 (x=0.05) reaches 3.4, 3.2 and 2.6×10-3 S/cm, respectively. Furthermore, the activation energy of such nanocrystalline films decrease to about 0.6 eV, which is almost half of that microcrystalline pellets (1 eV).

作者: D. M. ZHANG Z. ZHUANG Y. X. GAO X. P. WANG Q. F. FANG

作者单位: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academic of Science, Hefei 230031, Anhui, China

会议类型: 国际会议

会议名称: The 12th Asian Conference on Solid State Ionics(第十二届亚洲固态离子学会议暨第十五届中国固态离子学会议)

会议地点: 武汉

会议语种:英文

页码: 87-94

在线出版日期: 2010-05-02（万方平台首次上网日期，不代表论文的发表时间）