Name: Silica fume
Molecular formula: C7H9N5S2
Molecular weight: 227.3099
The main chemical composition of silica fume is: SiO2: 85-96% Al2O3 Fe2O3 MgO CaO NaO
Fineness of silica fume: the fineness of silica fume less than 1 µ m accounts for more than 80%, the average particle size is 0.1~0.3 µ m, and the specific surface area is 20~28m2/g.