La_(2-x)Al_xMo_2O_9(0≤x≤0.18)的溶胶凝胶合成及其电性能  

La_(2-x)Al_xMo_2O_9(0≤x≤0.18) sol-gel synthesis and its electrical properties

作　　者：季宏伟[1] 葛志敏[1] 周德凤[1] 

机构地区：[1]长春工业大学化学与生命科学学院,吉林长春130012

出　　处：《长春工业大学学报》2008年第4期446-451,共6页Journal of Changchun University of Technology

基　　金：吉林省科技发展计划资助项目(20070510)

摘　　要：采用溶胶凝胶法合成了La位掺杂Al的系列新型氧离子导体La2-xAlxMo2O9(0≤x≤0.18)。通过X-射线衍射(XRD)、拉曼光谱(Raman)、X-射线光电子能谱(XPS)、场发射扫描电镜(FE-SEM)等手段对氧化物结构进行分析,交流阻抗谱测试其电性能。结果表明,随Al掺杂量的增加,其晶胞参数有所减小;Al的掺杂对高温立方相的电导率没有明显改善,但显著提高了低温单斜相的电导率,同时,有效抑制了母体在580℃的相变。A serious new oxide-ion conductors La2-xAlxMo2O9（0≤x≤0.18） are prepared with sol-gel method. Their structures and ionic conductivities are characterized with X-ray Diffraction （XRD）, Raman, X-ray Photoelectron Spectroscopy （XPS）, field-emission scanning electron microscopy （FE- SEM） and AC impedance spectroscopy. The results show that the lattice constant will decrease with the increase of doping content Cr） ; the conductivity of the monoclinic phase at high temperature is not influenced obviously by the Al doping but at low temperature. The phase transition of the matrix at 580 ℃ is effectively suppressed.

关 键 词：氧离子导体 固体电解质 电导率 La2Mo2O9 

分 类 号：O614.33[理学—无机化学]