Precipitated silica products in the industrial field commonly known as white carbon black, also known as hydrated silica, light silica, the chemical expression is generally written as mSiO2·nH2O, the appearance of white highly dispersed amorphous powder, but also processed into granular as a commodity. The specific gravity is 2.319 ~ 2.653, the melting point is 1750℃, insoluble in water and most acids, after absorbing water in the air will become a collection of fine particles, soluble in caustic soda and hydrofluoric acid, stable to other chemicals, high temperature resistance does not decompose, does not burn, has a high electrical insulation, porosity, large internal surface area, water absorption, non-toxic.

Precipitated silica products have the following characteristics: bonding, anti-adhesion, anti-caking, condensation, controlled release, carrier, flow aid, improve printing effect, mechanical action, special additives for thermoplastics, reinforcement, rheological control, whitening. Hydrophobic silica treated by surface modification is easily soluble in oil and used as a reinforcing filler for rubber and plastics, which will significantly improve the mechanical strength and tear resistance of its products. Due to different manufacturing methods, the physical and chemical properties and microstructure of silica will have certain differences, so its application fields and application effects are also different. Hydrophobic silica treated by surface modification is easily soluble in oil and used as a reinforcing filler for rubber and plastics, which will significantly improve the mechanical strength and tear resistance of its products. Due to different manufacturing methods, the physical and chemical properties and microstructure of silica will have certain differences, so its application fields and application effects are also different.