The main difference is that the nature of different, different formation, different major uses, as follows:
I. Nature of different
1. Carbon black
Carbon black, is a kind of amorphous carbon. Light, loose and very fine black powder, is a carbon-containing substances (coal, natural gas, heavy oil, fuel oil, etc.) in the conditions of insufficient air by incomplete combustion or thermal decomposition of the product.
2, silica
Silica is a white powdered X-ray amorphous silicic acid and silicate products in general, mainly refers to precipitated silica, fumed silica and ultrafine silica gel, but also includes powdered synthetic aluminum silicate and calcium silicate.
Two, the formation of different
1, carbon black
Carbon black generally refers to carbon monomers particles, generally due to the insufficient combustion of organic matter, where the hydrogen and oxygen elements are converted to water, while the carbon elements are not sufficiently burned, it will be detached from the molecules, forming carbon black.
2, silica
Mainly non-metallic minerals and their extensions as a source of silica, using precipitation method to prepare silica. The key to the technology is to transform the crystallized silica and silicate into amorphous silica. Raw materials mainly include wollastonite, opal, eolite, olivine, serpentine, kaolin, hard kaolin, coal gangue, fly ash and so on.
Three, the main use of different
1, carbon black
Can be used as a black dye, used in the manufacture of Chinese ink, ink, paint, etc., but also used to do rubber reinforcing agent.
2, white carbon black
①, used in colored rubber products to replace carbon black for reinforcement.
②, in agricultural chemicals, such as pesticides, high-efficiency spray fertilizers, etc., the use of silica as a carrier or diluent, disintegrating agent.
③, transparent colored and opaque toothpaste with silica as filler and abrasive agent, such toothpaste has good flexibility, dispersion, smooth paste, soft, abrasive good use.
4, in natural rubber or synthetic rubber made of adhesive.
5, as anti-caking agent used in some products to improve the free flow.
Baidu Encyclopedia-Carbon Black
Baidu Encyclopedia-Silica