MoO_3掺杂对高纯Zr_(0.84)Y_(0.16)O_(1.92)体系结构和电性能的影响  

Effect of MoO_3-dopant on microstructure and electrical properties of pure 8YSZ electrolytes

作　　者：王淼[1] 李朝辉[1] 杨梅[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：《应用化工》2012年第2期202-205,211,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目(20871023);吉林省科技发展计划资助项目(20101549)

摘　　要：采用溶胶-凝胶法合成高纯(SiO2<50 mg/kg)Zr0.84Y0.16O1.92+x MoO3(0.00≤x≤0.07)固溶体,研究MoO3的掺杂量对Zr0.84Y0.16 O1.92体系结构和电性能的影响。通过X射线衍射(XRD)和场发射扫描电子显微镜(FE-SEM)对材料进行表征,交流阻抗谱(AC)测试材料的电性能。结果表明,掺入MoO3后,体系仍保持立方莹石型结构;MoO3掺杂于Zr0.84Y0.16O1.92固体电解质的最佳掺量为0.05%;MoO3具有降低体系烧结温度、促进晶粒生长和提高体系致密度的作用,掺入MoO3的Zr0.84Y0.16O1.92体系晶界电导率和总电导率提高。The high pure（SiO250 mg/kg） Zr0.84Y0.16O1.92 ＋ xMoO3（0.00 ≤ x ≤ 0.07） solid solution was prepared by the sol-gel method,then the effects of MoO3-doping on the structures and conductivity of the system was discussed.The system was characterized by X-ray diffraction（XRD）,field emission scanning electron microscopy（FE-SEM）,and AC impedance spectroscopy analysis.The results showed that MoO3 did not change the cubic fluorite-type structure of systems,the optimal doping value of MoO3 was 0.05%;MoO3 doping in Zr0.84Y0.16O1.92 solid electrolyte can lower the sintering temperature,promote the grain growth,improve the densification of the system and increase the grain boundary conductivity and total ionic conductivity.

关 键 词：固体电解质 MoO3掺杂 烧结助剂 电导率 

分 类 号：TM911.47[电气工程—电力电子与电力传动]