摘 要：硅灰石与盐酸快速反应制备出沉淀产物、实验产物 和溶胶产物3种无定形 SiO23种产物的比表面积分别在 200400和450m2／g 左右。实验所得3种产品都存在着纳 米颗粒粒径主要分布在20nm～5μm 之间溶胶产物和实验 产物的大颗粒内有2nm 左右的蠕虫状微孔结构而沉淀产 物没有此结构并对3种产物性质进行了对比研究。
关键词：硅灰石；无定形 SiO2；粉体性质
Abstract：Three types of amorphous SiO2（sediment productex perimental product and Ludox product）are prepared from quick speed reaction between wollastonite and hydrochloric acid．T he specific area of sediment productexperimental product and Lu dox product is 200400450m2／g respectively．T hree types products all are nano-particle and most of particle diameter is 20nm ～ 5μm．T he experimental product and the Ludox productʾs large size particles have worm-structure of pore diame ter1～2nmbut the sediment product has not．And the charac teristics of the three types amorphous SiO2are studied．
Keywords：wollastonite；amorphous SiO2；powder characteristics
