化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2010年
4期
1064-1068
,共5页
王佳东%申晓毅%翟玉春%吴艳
王佳東%申曉毅%翟玉春%吳豔
왕가동%신효의%적옥춘%오염
硅酸钠溶液%氧化硅%分步碳分
硅痠鈉溶液%氧化硅%分步碳分
규산납용액%양화규%분보탄분
sodium silicate solution%SiO_2%split-step carbonation
By using industrial sodium silicate solution as raw material,high purity SiO_2 powder was successfully synthesized by the split-step carbonation method.The relations between pH value of end point and the removal percentage of impurity at the first carbonation and the purity and yield of product SiO_2 powder at the second carbonation were studied.The SiO_2 powder was characterized by using XRD,SEM,IR and composition analysis.The results showed that when the pH value of end point at the first carbonation was 10.9,the purity of SiO_2 prepared was up to 99.9%.The SiO_2 powder synthesized was amorphous with regular sphere shape,uniform size and no reunion.The reaction mechanism was also discussed.
