草酸盐共沉淀法制备Ce_(0.8)Y_(0.2)O_(1.9)超细氧化物固溶体  

Preparation of Ce_(0.8)Y_(0.2)O_(1.9) by oxalate co precipitation

作　　者：杨春娟[1] 董如林[1] 陈智栋[1] 

机构地区：[1]江苏工业学院化学工程系,江苏常州213164

出　　处：《化学工程师》2007年第6期5-7,共3页Chemical Engineer

基　　金：留学回国人员科研启动基金项目(2006)331号;江苏工业学院科研启动资金助项目(ZMF04020106)

摘　　要：实验采用草酸二乙酯、Ce(NO_3)_3·6H_2O、Y(NO_3)_3·6H_2O为原料,以尿素为pH值调节剂,利用均相共沉淀法制备了20%(摩尔分数)Y_2O_3掺杂CeO_2(Ce_(0.8)Y_(0.2)O_(1.9))的氧化物前驱体,通过优化沉淀反应过程中尿素用量、pH值及沉淀物醇洗和干燥处理等制备工艺条件,实现对草酸盐沉淀物的制备过程中的团聚控制,得到分散良好的亚微米级草酸盐共沉淀物,进一步选择合适的热处理温度,得到亚微米级的超细Ce_(0.8)Y_(0.2)O_(1.9)粉体。Oxalate solid solution was obtained in a mixed aqueous solution system of diethyl oxalate, cerium nitrate and yttrium nitrate with urea as pH adjuster by homogenous precipitation . By majorizing the technological conditions, such as ：the use level of urea,pH, washing method and drying process,et al. reduced the agglomerated force of the oxalate particles. It proved that submicron oxalate particulate was prepared. Sub - micron Ce0.8Y0.2O1.9 was obtained by electing the suitable calcination temperature.

关 键 词：草酸二乙酯 尿素 均相沉淀法 Ce0.8Y0.2O1.9固溶体 

分 类 号：O614.32[理学—无机化学]