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What is the difference between carbon black and silica?
Mar 29, 2017

Carbon black and white carbon are not the same substance.

Carbon black is an amorphous carbon. Light, loose and very fine black powder, the specific surface area is very large, ranging from 10-3000m2 / g (domestic 3H-2000III nitrogen adsorption specific surface area meter test), organic matter (natural gas, heavy oil, fuel oil, etc.) in the air shortage Under the conditions of incomplete combustion or decomposition of the product derived from heat. Specific gravity of 1.8-2.1 made from natural gas called "gas black", made of oil called "light black", made of acetylene called "acetylene black". In addition there are "slot black" "furnace black". According to the performance of carbon black, "reinforced carbon black", "conductive carbon black", "wear-resistant carbon black" and so on. Can be used for black dyes, used in the manufacture of Chinese ink, ink, paint, etc., but also for rubber supplements.

White carbon black is a white powder X-ray amorphous silicic acid and silicate products in general, mainly refers to the precipitation of silica, fumed silica, ultra-fine silica gel and airgel, also includes powder Synthetic aluminum silicate and calcium silicate. White carbon black is a porous material, its composition can be expressed in SiO2? NH2O, where nH2O is in the form of surface hydroxyl form. Soluble in caustic and hydrofluoric acid, insoluble in water, solvents and acids (except hydrofluoric acid). High temperature, nonflammable, tasteless, odorless, with good electrical insulation.

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