利用四氯化硅制备二氧化硅粉体的研究  

Preparation of Silica Powders with Silicon Tetrachloride

作　　者：吴明明[1] 王吉清[1] 谈瑛[2] 侯清麟[2] 

机构地区：[1]湖南工业大学绿色包装与生物纳米技术应用省重点实验室,湖南株洲412007 [2]湖南工业大学包装新材料与技术重点实验室,湖南株洲412007

出　　处：《包装学报》2011年第2期25-29,共5页Packaging Journal

基　　金：湖南省科技计划重点基金资助项目(2009GK2012);湖南工业大学研究生创新基金资助项目(CX1017)

摘　　要：以多晶硅副产物四氯化硅和硅酸钠为硅源,以低浓度的非离子表面活性剂聚乙二醇和无水乙醇为添加剂成功合成了二氧化硅粉体。讨论了硅酸钠浓度、反应温度和表面活性剂的加入对二氧化硅颗粒粒径和形貌的影响。利用透射电子显微镜、扫描电子显微镜、Fourier红外光谱仪、X射线粉末衍射仪、激光粒度分析仪等测试工具对所制备的二氧化硅的结构、粒径、表观形貌进行了测试与表征。结果表明:在最佳试验条件下,可制得平均粒径为150nm的二氧化硅粉体;非离子表面活性剂的加入可使二氧化硅颗粒分散均匀;二氧化硅颗粒粒径随硅酸钠浓度的增大而增大,故控制硅酸钠的浓度是本实验的关键。The silica particles were prepared by using silicon tetrachloride （a main byproduct of polycrystalline silicon production） and sodium silicate as silica precursor,low concentration of nonionic surfactant polyethylene glycol and absolute alcohol as additives. The prepared silica has been characterized by transmission electron microscopy,scanning electron microscopy,X-ray powder diffraction,Fourier transform infrared spectroscopy and laser particle size analyzer. The results showed that the silica with average size of 150nm could be obtained under optimal conditions,the silica particles could be evenly dispersed because of adding PEG into the reaction solution and the particle size of silica increased with the increase of the concentration of sodium silicate. Therefore it is important to control the concentration of sodium silicate.

关 键 词：二氧化硅 硅酸钠 四氯化硅 

分 类 号：TQ127.2[化学工程—无机化工]