【作者】 郑颖平； 高文君； 查燕； 孙岳明；

【Author】 Ying-Ping Zheng,Wen-Jun Gao,Yan Zha,Yue-Ming Sun * College of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189

【机构】 东南大学化学化工学院；

【摘要】 <正>用聚丙烯酰胺溶胶凝胶法合成了ITSOFC用钙钛矿型关键材料的粉体La0.8Sr0.2MnO3(LSM)、La0.8Sr0.2CrO3(LSC)和La0.9Sr0.1Ga0.8Mg0.2O3-δ(LSGM)。用TG-DSC和X射线衍射仪分析了钙钛矿相的形成过程,用直流四电极法测量了LSGM的电导率随温度的变化关系,用SEM表征了LSGM电解更多还原

【Abstract】 Ultrafine perovskite-type powders with applicability in intermediate temperature solid oxide fuel cell(ITSOFC) were synthesized by a polyacrylamide sol-gel method: La0.8Sr0.2MnO3(LSM) 、La0.8Sr0.2CrO3(LSC)和La0.9Sr0.1Ga0.8Mg0.2O3-δ(LSGM).The forming process of the perovskite phase of the samples was analyzed by means of TG-DSC and X-ray diffractometer. The morphology and electrical properties of the LSGM sample were investigated by SEM and direct-current four-pole method. TEM observations showed that the particle size of LSGM、LSC and LSM was less than 80nm after heat treatment. The results reveal that the present polyacrylamide sol-gel method is a time-saving and efficient tool for easy synthesis of perovskite-type multicomponent oxide nanopowders. The method is advantageous to decrease the forming temperature of perovskite phase and agglomeration and to enhance purity, electrical property and sinterability.更多还原