(La_(1-x)Yb_x)_2Mo_2O_9(x=0.06)陶瓷的制备及其电性能  

Synthesis and Electrical Properties of Oxide-ion Conductor(La_(1-x)Yb_x)_2Mo_2O_9(x=0.06)

作　　者：王洪涛[1,2] 马桂林[1] 郝凌云[2] 

机构地区：[1]苏州大学材料与化学化工学部,苏州215123 [2]阜阳师范学院化学化工学院,阜阳236041

出　　处：《材料导报》2009年第16期111-113,共3页Materials Reports

基　　金：国家自然科学基金资助项目(20771079);安徽青年教师"资助计划"(2007jq1142);2008年度安徽省高层次人才引进及创新创业资助项目(2008Z038);阜阳师范学院院科研项目(2007LQ05)

摘　　要：采用XRD、SEM、电化学工作站等方法对高温固相反应法合成的(La_(1-x)Yb_x)_2Mo_2O_9(x=0.06)固体电解质材料的电性能进行了研究。粉末XRD结果表明,该样品为单一立方相La2Mo2O9结构。在测定温度范围内,不同气氛下的电导率随温度的升高基本呈线性增大,干燥氧气气氛下表现出较高的电导率,900℃时达到最大值0.066S/cm。(La_(1-x)Yb_x)_2Mo_2O_9(x=0.06)能完全抑制La2Mo2O9母体的相变。氧分压与电导率的关系表明样品在高氧分压气氛中是离子导体,在低氧分压气氛中是离子与电子的混合导体。The solid electrolyte material （La1-xYbx ）2 Mo2O9 （x = 0. 06） is prepared using a conventional solid state reaction method and the sample is investigated by means of XRD, SEM, electrochemical workstation. X-ray powder diffraction pattern shows that the ceramic is a single cubic phase of La2 Mo2O9. The conductivity linearly increases when the tempreture raises at 400-900℃ in various atmospheres, the maximal conductivity is 0. 066S/em in dry O2 at 900℃. The ceramic can completely inhibit the phase transition when x=0. 06. The dependence of electrical conductivity on oxygen partial pressure indicates that the sample is almost a pure ionic conductor at high oxygen partial pressure and a mixed ionic and electronic one at low oxygen partial pressure

关 键 词：固体电解质材料 氧离子导体 相变 电导率 

分 类 号：TQ133.3[化学工程—无机化工] O614.33[理学—无机化学]