SrCe_(0.95)Yb_(0.05)O_(3-α)的直接固相法制备及其导电性能  

Preparation of direct solid-state reaction and conductivity of SrCe_(0.95)Yb_(0.05)O_(3-α) protonic conduction

作　　者：邵玮[1] 张宏力[2] 方建慧[1] 马金昌[1] 胡君蓉[1] 鲁雄刚[1] 丁伟中[1] 

机构地区：[1]上海大学上海市钢铁冶金重点实验室,上海200072 [2]上海大学理学院,上海200346

出　　处：《中国有色金属学报》2004年第1期42-46,共5页The Chinese Journal of Nonferrous Metals

基　　金：上海市教委重点基金资助项目(01AZ01)

摘　　要：采用改进的直接固相合成工艺,制备了SrCe0.95Yb0.05O3-α固体电解质。应用AUTOLABPGSTAT30型电化学工作站测定了不同温度和不同气氛下SrCe0.95Yb0.05O3-α的阻抗谱,在350～800℃内电导率为6.3×10-5～4.8×10-3S/cm,计算得到电导活化能分别为0.63eV(空气气氛下),0.46eV(水蒸气气氛下)。研究结果表明,该工艺方法简单,能避免材料制备过程中杂质的混入,且制得的SrCe0.95Yb0.05O3-α高温质子导体电性能良好。SrCe_(0.95)Yb_(0.05)O_(3-α) was prepared by direct solid-state reaction. The AC impedance spectrums of SrCe_(0.95)-(Yb_(0.05))O_(3-α) were measured by AUTOLAB PGSTAT30 electrochemical measuring device at different testing temperatures and gas atmospheres. The conductivity of the electrolyte was 6.3×10^(-5)～4.8×10^(-3) S/cm at the temperature range of 350～800℃. The activation energies were 0.63eV and 0. 46eV in air and water vapor, respectively. The results show that the improved technique is convenient. It can keep impurity out of the preparing procedure. The prepared high temperature protonic conduction SrCe_(0.95)Yb_(0.05)O_(3-α) has good electric performance.

关 键 词：固相合成法 高温质子导体 阻抗谱 活化能 导电性能 固体电解质 

分 类 号：TM2[一般工业技术—材料科学与工程]