固体氧化物燃料电池Sr_2MgMoO_(6–δ)阳极材料制备及电导性能  

PREPARATION AND CONDUCTIVITY PROPERTIES OF Sr_2MgMoO_(6-δ) ANODE MATERIAL FOR THE SOLID OXIDE FUEL CELLS

作　　者：孔令采[1] 刘邦武[1] 顾有松[1] 张跃[1,2] 

机构地区：[1]北京科技大学材料物理系 [2]北京市新能源材料与技术重点实验室,北京100083

出　　处：《硅酸盐学报》2009年第3期378-382,共5页Journal of The Chinese Ceramic Society

基　　金：国家"973"(2007CB93620);科技部国际科技合作计划(2006DFB51000);国家"863"计划(2006AA03Z351);国家自然科学基金合作与交流重大(50620120439)资助项目

摘　　要：通过溶胶–凝胶热分解法制备了Sr2MgMoO6–δ(SMMO)阳极粉体。对粉体的物相和微观组织进行分析,研究了SMMO的烧结活性及烧结后在不同气氛中的电导率。结果表明:1450℃烧结12h后,SMMO形成完整的双钙钛矿相;100MPa压力下的SMMO形成致密的陶瓷块体。能谱分析显示实验组分的摩尔比与理论值吻合。SMMO在空气气氛中的电导率较低,800℃的电导率为1.3×10–3S/cm,导电活化能为136.4kJ/mol;在H2气氛中的电导率大大增强,800?C的电导率为0.41S/cm,导电活化能降低到12kJ/mol,表现出很好的导电性。The Sr2MgMoO6-δ(SMMO) anode powders were synthesized by a novel solgel thermolysis method.The phase evolutions and microstructure were studied.The sintering activity and conductivities in different atmospheres were measured.It is found that well-crystallized double perovskite is obtained by calcination at 1 450 ℃ for 12 h.The pressed SMMO at 100 MPa forms a dense ceramic block.The energy dispersive spectroscopy results show that the atomic percentages are in good agreement with the theoretical values.The SM...

关 键 词：阳极粉体 微观组织 电导率 溶胶–凝胶热分解法 

分 类 号：TM911.4[电气工程—电力电子与电力传动]