What is the difference between silica and carbon black?

Carbon black and silica are completely two substances. Some aspects can be substituted.

Carbon black is a hydrocarbon produced in the gas phase under strictly controlled process conditions. A black powdery substance formed by incomplete combustion or pyrolysis.

Silk black is a white powdery X-ray amorphous silicic acid and silicate products, mainly refers to precipitated silica, fumed silica, ultrafine silica gel and aerogel, and also includes powdered synthetic aluminum silicate and calcium silicate, etc. Silk black is a porous substance, and its composition can be expressed as SiO2·nH2O, where nH2O exists in the form of surface hydroxyl groups. Soluble in caustic alkali and hydrofluoric acid, but insoluble in water, solvents and acids (except hydrofluoric acid). It is high temperature resistant, non-flammable, tasteless, odorless, and has good electrical insulation.

White carbon black is used in colored rubber products to replace carbon black for reinforcement, meeting the requirements of white or semi-white The need for transparent products. White carbon black also has strong adhesion, tear resistance, heat resistance and anti-aging properties, so it can also replace part of carbon black in black rubber products to obtain high-quality rubber products, such as off-road tires, engineering tires, Radial tires, etc.