SrCe_(0.9)Ho_(0.1)O_(3-α)陶瓷的质子导电性  

Electrical Conductivity of SrCe_(0.9)Ho_(0.1)O_(3-α) Ceramics

作　　者：于玠[1] 康新华[1] 马桂林[1] 仇立干[2] 

机构地区：[1]苏州大学化学化工学院,江苏苏州215123 [2]盐城师范学院化学系,江苏盐城224002

出　　处：《中国稀土学报》2006年第3期376-379,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金资助项目(20171034);苏州大学"211工程"基金资助项目

摘　　要：以高温固相反应法合成了复合氧化物陶瓷SrCe0.9Ho0.1O3-α。粉末XRD结果表明，该陶瓷样品为单一斜方相钙钛矿型结构。采用交流阻抗谱和氢浓差电池方法研究了样品在600-1000℃下湿润氢气中的质子导电性能。结果表明，在氢气气氛中600-1000℃范围，陶瓷样品质子迁移数约为1，几乎是一个纯质子导体，质子电导活化能为61.0kJ·mol^-1，最大质子电导率为1．6×10^-2S·cm^-1，该样品在此实验条件下还具有良好的化学稳定性。Proton-conducting SrCe0.9HO0.1O3-α ceramics was prepared by high-temperature solid state reaction. X-ray powder diffraction patterns show that the ceramics is of a single orthorhombic phase of perovskite-type SrCeO3. Using the ceramics as solid electrolyte and porous platinum as electrodes, the protonic conduction in the ceramics was investigated by using ac impedance spectroscopy and gas concentration cell methods in the temperature range of 600 - 1000 ℃. The results show that the protonic transport number of the sample is close to unity and it is almost a pure protonic conductor with the maximum protonic conductivi- ty of 1.6 x 10^-2 S·cm^-1, and the activation energy for the protonic conduction is 61.0 kJ· mol^-1 In addition, the sample exhibits high chemical stability in hydrogen atmosphere.

关 键 词：钙钛矿型氧化物 质子导体 气体浓差电池 阻抗谱 稀土 

分 类 号：O614.232[理学—无机化学] O614.33[理学—化学]