Influence Of Tungsten Doping In La2Mo2O9 Oxide-ion Conductors By Dielectric Relaxation Measurements
The effects of tungsten doping in La2Mo2-yWyO9 (y =0, 0.25, 0.5, 1.0, 1.4) samples were studied using dielectric relaxation measurements. The results indicate that the solubility of W6+ in La2Mo2O9 sample is about 25mol％, W6+ can suppress the ot/p phase transition in the La2Mo2O9. Additional to the low-temperature relaxation peak Pd associated with oxygen ion diffusion, a new dielectric loss peak Ph associated with a phase transition from the static disordered state to the dynamic disordered state of oxygen ion distribution was observed aroifnd 740 K. The conductivity of La2M01.9W0.1O9 sample is higher than that of the pure La2Mo2O9, and then decrease with the increasing of the tungsten doping in La2Mo2yWyO9 (y = 0.5, 1.0) samples in the whole measurement temperature.
La2Mo2O9 Dielectric Relaxation Phase Transition Conductivity
Dan Li Xianghu Li
Department of Mathematicas and Physics, Wuhan Polytechnic University, Wuhan 430023, China
国际会议
合肥
英文
3302-3305
2011-09-23（万方平台首次上网日期，不代表论文的发表时间）