纳米SiO_2的CO_2沉淀法制备  

Preparation of nano-SiO_2 by precipitation

作　　者：陈艳芳[1] 田彦文[1] 李清海[1] 翟玉春[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《材料与冶金学报》2004年第3期199-201,共3页Journal of Materials and Metallurgy

基　　金：辽宁省自然科学基金(002054).

摘　　要：以CO2和硅酸钠为原料的CO2沉淀法是制备纳米SiO2的一种常用方法,报道了将CO2和硅酸钠溶液同时通入具有一定pH值的溶液中进行反应的新工艺.实验确定了制备纳米SiO2的最佳工艺条件.在最佳工艺条件下制备出平均粒径在40～50nm的SiO2超细纳米粉,通过TEM的方法对其进行了表征.Nano-silica is often prepared from CO_2 and sodium silicate by precipitation method. In this paper, a new precipitation method was conducted developed that a certain PH solution with CO_2 and sodium silicate are added simultaneously into a certain pH solution. The optimum process condition is confirmed and nano-SiO_2 with average diameter of about 40～50 nm was obtained. The product was characterized by TEM method.

关 键 词：CO2 硅酸钠 沉淀法 纳米SIO2 

分 类 号：TQ050.421[化学工程]