焙烧温度对复合储氧材料性能的影响  

Effects on compound oxygen storage materials of calcinations temperature

作　　者：刘萍[1] 赵明[1] 房华[1] 龚茂初[1] 陈耀强[1] 

机构地区：[1]四川大学化学学院

出　　处：《化学研究与应用》2007年第5期513-516,共4页Chemical Research and Application

基　　金：国家重点基金资助项目(20333030);国家自然科学基金资助项目(20273043)

摘　　要：In the present paper,Ce-Zr-Y-La-Mn oxygen storage material was synthesized by co-precipitation method and characterized by X ray diffraction(XRD),BET,TG and temperature programmed reduction(TPR).The effects of textural and structural properties,low temperature redox behavior,and change in phase were investigated at various calcination temperatures.The XRD results show that the samples belong to the same crystalline shift at various calcinations temperature and the fluorite structure of the precipitation keeps unchanged.The new phase is not separated from the solid solution after calcined at 1000℃.The BET results show that the surface area of the sample reaches 45m2/g after aging 5h at 1000℃.The TPR results show that the sample indicates best reducibility calcined at 600℃.In the present paper, Ce-Zr-Y-La-Mn oxygen storage material was synthesized by co-precipitation method and characterized by X ray diffraction （XRD）, BET, TG and temperature programmed reduction （TPR）. The effects of textural and structural properties, low temperature redox behavior, and change in phase were investigated at various calcination temperatures. The XRD results show that the samples belong to the same crystalline shift at various calcinations temperature and the fluorite structure of the precipitation keeps unchanged. The new phase is not separated from the solid solution after calcined at 1000℃. The BET results show that the surface area of the sample reaches 45m^2/g after aging 5h at 1000℃. The TPR results show that the sample indicates best reducibility calcined at 600℃.

关 键 词：储氧材料 还原性 热稳定性 

分 类 号：O643.3[理学—物理化学]