质子导体BaCe_(0.4)Zr_(0.4)M_(0.2)O_(3-δ)(M=In,Y,Gd,Sm)化学稳定性及电性能  

Chemical Stability and Electrical Properties of Proton Conductors BaCe_(0.4)Zr_(0.4)M_(0.2)O_(3-δ) (M=In, Y, Gd, Sm)

作　　者：吕敬德[1] 王岭[1] 赵艳琴[1] 戴磊[1] 郭红霞[1] 郭强强[1] 陈学钊[1] 郝静然[1] 

机构地区：[1]河北理工大学化工与生物技术学院,唐山063009

出　　处：《无机化学学报》2008年第5期696-700,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.50772030;50572024);教育部归国人员启动基金;唐山市科技局资助项目(No.04364001B-10)

摘　　要：采用高温固相法制备了不同阳离子掺杂的BaCe_0.4Zr_0.4M_0.2O_(3-δ)(M=In,Y,Gd,Sm)系列质子导体。运用X射线衍射仪、扫描电子显微镜分别对四类质子导体的物相结构、微观形貌进行了表征,应用IM6e型电化学工作站测定了其不同温度下的阻抗谱,并对样品在CO_2和沸水中的稳定性进行了研究。结果表明:除Sm^(3+)掺杂的质子导体有少量的杂质相Sm_2O_3外,其他3种均为单相立方晶钙钛矿结构;对CO_2和沸水皆表现良好的化学稳定性;Y^(3+)掺杂的质子导体具有高的电导率,800℃约为2.07×10^(-2)S·cm^(-1),空气气氛电导活化能为72.34kJ·mol^(-1)。onal solid Proton conductors BaCe0.4Zr0.4M0.2O3-δ （M=In, Y, Gd, Sm） were successfully synthesized by the conventistate reaction route. The crystalline phase and microstructures of the four proton conductors were investigated by electrochemical XRD and SEM. The AC impedance spectra of the proton conductors were measured by IM6e workstation at different temperatures. Chemical stability against CO2 and boiling water was tested. The results indicate that traces of Sm2O3 are found in Sm-doped sample because of the solubility limit. The other three proton conductors show single phase perovskite cubic structure. They are relatively stable in CO2 and boiling water atmospheres. Y-doped proton conductor has the highest electrical conductivity among the four proton conductors. The total conductivity of BaCe0.4Zr0.4M0.2O3-δ at 800 ℃ is about 2.07×10^-2 S.cm^-1. The activity energy is 72.34 kJ. mol^-1.

关 键 词：BACEO3 BaZrO3 化学稳定性 电导率 

分 类 号：O614.33[理学—无机化学] O614.233[理学—化学]