共沉淀法合成La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ)及其性质的研究  

Synthesis and Characterization of La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ) by Coprecipitation

作　　者：赫文秀[1,2] 安胜利[1] 张永强[1] 秦瑾[1] 

机构地区：[1]内蒙古科技大学化学与化工学院,包头014010 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《材料导报》2009年第24期81-83,87,共4页Materials Reports

基　　金：973前期预研项目(2008cb17600)

摘　　要：采用共沉淀法合成了具有钙钛矿结构的中温固体电解质La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ)(LSGM),并用DTA-TGA和X射线衍射仪分析了LSGM材料中钙钛矿相的形成过程,采用SEM、交流阻抗谱等检测技术对LSGM电解质的结构及性能进行了表征。XRD分析结果表明,1200℃烧结后,粉体开始形成钙钛矿结构,随温度的升高粉体中杂相含量越来越少,于1450℃时形成了单一的钙钛矿相结构。The intermediate-temperature solid electrolyte with perovskite-type La0.9Sr0.1Ga0.8Mg0.2O3-δ （ LS- GM） is synthesized using coprecipitation. The forming process of the perovskite phase in LSGM material is analyzed by means of DTA-TGA and X-ray diffractometer, the microstructure and features are tested by analysis SEM and AC impedance methods. XRD patterns indicate that perovskite phase exists after the materials is sintered at 1200℃, with the temperature increasing, the impurity become less, the powder has pure perovskite phase when the mixed materials are sintered at 1450℃.

关 键 词：共沉淀La0.9Sr0.1Ga0.8Mg0.2O2.85 固体电解质 离子电导率 

分 类 号：TQ174.758[化学工程—陶瓷工业] TQ133.3[化学工程—硅酸盐工业]