BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45)的制备及性能研究  

Investigation into Preparation and Properties of BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45)

作　　者：王岭[1] 赵佳一[1] 戴磊[1] 王婧 李跃华[1] 谢全安[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》2010年第4期701-707,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然基金项目(No.50772030;50972038);教育部归国人员启动基金;唐山市科学技术研究与发展计划项目(No.04364001B-16)资助

摘　　要：采用高温固相反应法制备了质子导体BaCe0.8-xNbxGd0.2O3-δ(0≤x≤0.45)。结合XRD、SEM、EIS等技术对其物相、微观形貌、稳定性及电导率进行了研究。结果表明,在1600℃烧结5h制备的质子导体BaCe0.8-xNbxGd0.2O3-δ(0≤x≤0.45)均能保持主相为斜方晶的钙钛矿结构。Nb的加入可明显提高烧结样品的致密性及在CO2和水蒸气气氛下的稳定性。在湿润H2/Ar(0.4%,V/V)气氛中800℃下,x=0.1样品的电导率为5.73mS·cm-1,电导活化能为0.35eV,与x=0的样品相当。The proton conductors BaCe0.8-xNbxGd0.2O3-δ （0≤x≤0.45） were synthesized by high temperature solid-state reaction method and its phase, microstructure, stability and conductivity were studied by XRD, SEM and EIS. The results showed that the proton conductors BaCe0.8-xNbxGd0.2O3-δ （0≤x≤0.45） sintered at 1 600 ℃ for 5 h was orthorhombic perovskite structure. With x value increase, the density of samples increased and stability in the presence of H2O and CO2 was improved. The conductivity of sample with x=0.1 is 5.73 mS·cm^-1 in wet H2/Ar （0.4%, V/V） at 800 ℃ and its conduction activation energy is 0.35 eV, which corresponds to that of sample with x=0.

关 键 词：质子导体 BaCe0.8-xNbxGd0.2O3-δ 稳定性 电导率 

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