【摘要】 采用X射线衍射技术分析了SrCO3和CeO2 (摩尔比 2∶1 )混合粉料经不同灼烧时间反应后的物相组成 .结果表明在Sr2 CeO4的形成过程中将出现不稳定的中间相SrCeO3,原始粉料CeO2 相会提前消失 ,SrCeO3与SrCO3反应生成最终稳定的目标相Sr2 CeO4.X射线衍射数据显示Sr2 CeO4属正交晶系更多还原

【Abstract】 The phase assembles of the SrCO 3 and CeO 2(2∶1)starting powder mixture calcined for different time were identified by X ray diffraction method.It was found that the intermediate phase SrCeO 3 was developed and the starting powder phase CeO 2 was lost in advance during the formation of Sr 2CeO 4.SrCeO 3 and SrCO 3 were converted to the final product Sr 2CeO 4.The results of XRD reveal that Sr 2CeO 4 belongs to orthorhombic crystal system.更多还原