单质硅溶解法制备大粒径硅溶胶  

Preparation of Silica Sol of Large Particle Size by Silicon Dissolving Method

作　　者：黄彩霞[1] 黎振球[1] 张元静[1] 李敬华[1] 曹承赟[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2010年第4期355-360,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

摘　　要：考察常压状态和加压状态下单质硅溶解法制备硅溶胶的工艺条件,探索加压状态下的大粒径硅溶胶的制备。结果表明:常压状态下,硅溶胶制备的较佳工艺为反应温度80℃,反应时间8 h,200 mL蒸馏水中加入10 g硅粉和0.3 g氢氧化钠,所得硅溶胶粒径在30 nm左右;加压状态下,硅溶胶制备的较佳反应条件:压力2 MPa,温度150℃,反应时间8 h,200 mL蒸馏水中加入10 g硅粉和0.3 g氢氧化钠,可制得粒径在100 nm以上,单分散状态良好的大粒径硅溶胶。Silica sol was prepared by silicon dissolution method using silicon powder and water as raw materials under atmospheric state and pressure state.The results showed that,under atmospheric state,the optimum reaction conditions were silicon powder 10 g,sodium hydroxide 0.3 g,water 200 mL,reaction time 8 h at 80 ℃.Under above conditions,the particle size of obtained silica sol was about 30 nm.While under the conditions of reaction pressure 2 MPa and temperature 150 ℃,the particle size of obtained silica sol was larger than 100 nm with good monodispersity.

关 键 词：单质硅 溶解法 大粒径硅溶胶 

分 类 号：TQ127.2[化学工程—无机化工]