化学沉淀法制微细SiO_2粉末  

Preparation of Fine Powder of SiO_2 by Chemical Precipitation Method

作　　者：徐阳[1] 陈沁[1] 胡春霞[1] 李晶[1] 

机构地区：[1]兰州工业学院材料工程系,甘肃兰州730050

出　　处：《兰州工业高等专科学校学报》2013年第3期48-54,共7页Journal of Lanzhou Higher Polytechnical College

摘　　要：采用正交分析法研究以硅酸钠和盐酸为原料,用化学沉淀法制备微细SiO2粉末过程中反应温度、乙醇/水体积比、HCl浓度等影响因素对产品质量的影响,并利用粒度分析仪和金相显微镜对产品的粒度和形貌进行测试.实验结果表明在反应温度40℃,乙醇/水体积比为0.5,盐酸浓度为1.4 mol/L条件下制得的SiO2粉末,其粒径小且颗粒分散均匀.In this paper, fine powder of SiO2 is prepared by chemical precipitation method, using sodium silicate and hydrochloric acid as raw materials. Orthogonal test is used to research the influence of reaction temperature, the ethanol/water volume ratio and HC1 concentration on product quality. The optimal experimental conditions are found out and the particle size and morphology are examined by particle size analyzer and optical microscope, respectively. The optimal experimental condition is reaction temperature 40℃, ethanol/water volume ratio 0.5 and HC1 concentration 1.4mol/L. Compared with other nine group tests, the particle size of Si02 prepared on the optimal experimental condition is small and the particle distributed evenly, which proved that the selected experimental conditions is correct.

关 键 词：微细颗粒 SIO2 化学沉淀 

分 类 号：TQ127[化学工程—无机化工]