硅酸钠溶液分步碳分制备高纯沉淀氧化硅

　第61卷　第4期　　化　工　学　报　　　　　　　Vol161　No14　2010年4月　　CIESC　Journal　　　April　2010研究简报硅酸钠溶液分步碳分制备高纯沉淀氧化硅王佳东,申晓毅,翟玉春,吴　艳(东北大学材料与冶金学院,辽宁沈阳110004)关键词:硅酸钠溶液;氧化硅;分步碳分中图分类号:TQ12712　　　　　　文献标识码:A文章编号:0438-1157(2010)04-1064-05PreparationofhighpuritySiO2bysplit2stepcarbonationprocessfromindustrialsodiumsilicatesolutionWANGJiadong,SHENXiaoyi,ZHAIYuchun,WUYan(SchoolofMaterialsandMetallurgy,NortheasternUniversity,Shenyang110004,Liaoning,China)Abstract:Byusingindustrialsodiumsilicatesolutionasrawmaterial,highpuritySiO2powderwassuccessfullysynthesizedbythesplit2stepcarbonationmethod1TherelationsbetweenpHvalueofendpointandtheremovalpercentageofimpurityatthefirstcarbonationandthepurityandyieldofproductSiO2powderatthesecondcarbonationwerestudied1TheSiO2powderwascharacterizedbyusingXRD,SEM,IRandcompositionanalysis1TheresultsshowedthatwhenthepHvalueofendpointatthefirstcarbonationwas1019,thepurityofSiO2preparedwasupto9919%1TheSiO2powdersynthesizedwasamorphouswithregularsphereshape,uniformsizeandnoreunion1Thereactio