Ce_(1-x)Ho_xO_(2-δ)(x=0.05～0.3)固体电解质的性能研究  

Study on the performance of solid electrolyte Ce_(1-x)Ho_xO_(2-δ)(x=0.05～0.3)

作　　者：吕秋月[1] 林晓敏[1] 魏白光[1] 

机构地区：[1]北华大学物理学院,吉林吉林132013

出　　处：《吉林化工学院学报》2012年第5期92-95,共4页Journal of Jilin Institute of Chemical Technology

基　　金：吉林省教育厅"十二五"科学技术研究项目(2011142)

摘　　要：利用溶胶-凝胶法合成固体电解质Ce1-xHoxO2-δ(x=0.05～0.30),采用X-射线衍射仪(XRD)、拉曼光谱仪(Raman)、原子力显微镜(AFM)对样品的结构进行表征,利用交流阻抗谱测试掺杂稀土Ho对其电性能的影响.XRD结果表明:800℃焙烧的所有样品均为单相立方萤石结构,Raman光谱表明:Ce0.85Ho0.15O2-δ具有氧缺位的萤石结构,AFM照片显示Ce0.85Ho0.15O2-δ致密度较好,阻抗谱结果表明:掺入Ho3+提高了Ce1-xHoxO2-δ的电导率,Ce0.85Ho0.15O2-δ的电导率最高,活化能最小,600℃时的电导率为0.016 S·cm-1,活化能为0.92 eV,比未掺杂的CeO2的电导率提高了4个数量级.Solid electrolyte Ce1-x HoxO2-δ （x =0.05 -0.30） was prepared by sol-gel method. Structural characteristics of the materials were investigated by means of X-ray diffraction （ XRD）, Raman spectroscopy and atomic force microscope （AFM）. The electrical properties of Ce1-x HoxO2-δwere analyzed by AC impedance spectroscopy. XRD measurement shows that all samples calcined at 800 ℃ were in single cubic fluorite structure. The Raman spectra shows that Ce0.85 H% 15 O2-δ is cubic fluorite structure with the oxygen vacancies; AFM image indicates that Ce0.85Ho0.15O2-δ is of higher density microstructure. Impedance spectra showes that the doping Ho3 ＋ could improve total conductivity of the material Ce1 -xHoxO2-δ. Ce0.85Ho0. 15O2-δ is possessed of the maximum of conductivity and the minimum activation energy, σ600℃ = 0. 016 S/cm, Ea = 0. 92 eV, which is four orders of magnitude as large as that of CeO2.

关 键 词：溶胶-凝胶法 Ce1-xHoxO2-δ 固体电解质 拉曼谱 电导率 

分 类 号：O482.4[理学—固体物理]