Silica fume

The average particle size of  Silica fume is 0.2um, and the specific surface area is 15,000-25,000 m2/kg. Its main component is silicon dioxide, the content is 85% to 95%, the impurity component is sodium oxide, calcium oxide, iron oxide, alumina and other metal oxides and a small amount of elemental carbon, silicon and so on. Because silica in micro-silica powder is an amorphous substance with high activity, fine particles, large specific surface area and excellent physical and chemical properties, it is widely used in concrete, refractory materials, wall materials, cement products, mortar, floor, chemical industry and other important fields used in special projects.