单分散纳米二氧化硅的制备  

Preparation of Monodispersed SiO2 Nano-particles

作　　者：郭洪娜[1] 郑少华[1] 马士玉[1] 丁海洋[1] 

机构地区：[1]济南大学材料科学与工程学院

出　　处：《中国粉体技术》2009年第3期42-44,共3页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:50572034

摘　　要：以正硅酸乙酯为原料，氨水为催化剂，采用化学沉淀法，通过合理地控制反应条件，制备了单分散球形纳米二氧化硅颗粒。通过激光粒度分析、X射线衍射及透射电镜等测试手段对制备的二氧化硅颗粒进行表征。结果表明：当最佳试验条件为正硅胶乙酯与乙醇、氨水的物质的量为1：6：4，表面活性剂的添加量为3％时，制备的纳米氧化硅粒度分布均匀，且呈规则的球形，粒径为50-90nm，为无定形态二氧化硅。The mono-dispersed SiO2 nano-particles were prepared by chemical precipitation. The tetraethyl orthosilicate（TEOS ） was adopted as rough material and the ammonia liquor （NH4OH） was served as catalytic agent. Laser particle size analyzer, X-ray diffraction and transmission electron microscope were used to characterize the as-prepared particles. The results showed that the SiO2 nano-particles with uniform distribution of grain size （50-90 nm） ,amorphous phase and regular spherical shape were obtained by the optimal conditions,which the molar ratio of tetraethyl orthosilicate, ethanol and ammonia was 1：6：4.

关 键 词：纳米二氧化硅 化学沉淀法 单分散 

分 类 号：TF123.7[冶金工程—粉末冶金]