协同制备氧化物SrFeCo_(0.5)O_y的研究  

Synergistic Preparation of Oxide SrFeCo_(0.5)O_y

作　　者：霍地[1] 张劲松[1] 杨洪才[2] 杨永进[1] 

机构地区：[1]中国科学院金属研究所,辽宁沈阳110014 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《材料科学与工程学报》2003年第5期630-634,共5页Journal of Materials Science and Engineering

基　　金：国家"973"资助项目(批准号 :G2 0 0 0 0 672 0 0 )

摘　　要：采用柠檬酸溶胶凝胶合成法协同微波加热烧结制备了混合导体氧化物SrFeCo0 5Oy。利用差热分析 (DTA)、X 射线衍射 (XRD)、电子透射电镜 (TEM)与电子扫描电镜 (SEM)对合成与烧结样品进行了分析与表征 ,当羧酸根 硝酸根的比值 (α)为 0 6 4时 ,在 5 5 0℃下焙烧干凝胶即可得到单相钙钛矿结构的Sr Fe Co O混合氧化物 ,而且合成的氧化物SrFeCo0 5Oy 颗粒细小、分布均匀。微波协同烧结制备的SrFeCo0 5Oy 氧化物的样品相对密度达到 96 %。与常规烧结样品相比较 ,协同烧结制备温度低 ,时间短 ;所得样品的绝对主相为钙钛矿型SrFe1The mixed-conducting oxide SrFeCo 0.5O-y was prepared by citrate sol-gel method cooperative with microwave sintering.The as-synthesized powders and as-sintered samples were characterized and analyzed by DTA,XRD,TEM and SEM/EDX.Single perovskite phase of Sr-Fe-Co-O oxide was obtained at 550℃ by sintering the xerogel as the value of citrate to nitrate ratio(α) was 0^64.The resulted SrFeCo 0.5O-y powder was small and homogeneous.The relative density of sample sintered by microwave cooperative method was 96%.As compared to conventional sintering mathod,the sintering temperature is lower and the keeping time is less.It is shown that the absolute dominated phase was perovskite type oxides in SrFeCo 0.5O-y prepared by combined method.

关 键 词：SrFeCo0.5Oy 柠檬酸溶胶凝胶合成法 微波加热烧结 混合导体氧化物 

分 类 号：TM241[一般工业技术—材料科学与工程]