What is the national standard index of silica?

Fumed Silica Also known as fumed silica, it has excellent reinforcing, thickening, thixotropic and other properties and is widely used in rubber, coatings, adhesives, Industrial fields such as inks, gel batteries, and composite insulators have played an important role in improving product performance. According to statistics, the current total consumption of fumed silica in my country is about 12,000 tons/year, which is continuing to grow at a rapid rate. By 2010, the total consumption is expected to exceed 20,000 tons/year. However, due to the lack of national and industry standards, domestic production and sales of fumed silica have been in a state of disorder. GB/T20020-2005 “Fumed Silica” has been modified to adopt ISO3262-20:2000E, covering hydrophilic and hydrophobic fumed silica products. This standard is also the world’s first national standard for fumed silica. Its promulgation and implementation will play an important role in regulating my country’s fumed silica market and improving the technical level of fumed silica.

White Carbon Blackis the general name for white powderyX-ray amorphous silicic acid and silicate products, mainly referring to precipitated silica, fumed silica, ultrafine silica gel and Silk blackAerogels also include powdered synthetic aluminum silicate and calcium silicate. White carbon black is a porous material, and its composition can be represented bySiO2 nH2O, where nH2O is in the form of surface hydroxyl groups exist. 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 generally divided into precipitation method silica and gas phase method silica according to the production method. Vapor-phase silica is normally white amorphous flocculent translucent solid colloidal nanoparticles (particle size less than 100nm), non-toxic, and has a huge specific surface area. Vapor-phase silica is all nano-silica, with product purity up to 99% and particle size up to 10~20nm, but the preparation process is complex and expensive; precipitation silica is divided into traditional precipitation silica and precipitation silica. Special precipitation method silica, the former refers to silica produced using sulfuric acid, hydrochloric acid, CO2 and water glass as basic raw materials, while the latter refers to silica produced using hypergravity technology, sol-gel method, chemical crystal method, and secondary crystallization Silica produced by special methods such as the method or the reverse micelle microemulsion method. Precipitated silica is mainly used as a reinforcing agent for natural rubber and synthetic rubber, toothpaste friction agent, etc. Fumed silica is mainly used as a reinforcing agent for silicone rubber, coatings and unsaturated resin thickeners. Ultrafine silica gel and aerogel are mainly used as matting agents and thickeners for coatings. , plastic film opening agent, etc.

Silk black It is a general term for white powdery X-ray amorphous silicic acid and silicate products, mainly referring to precipitated silica, fumed silica, ultrafine silica gel andSilk blackAerogels, including powdered synthetic aluminum silicate and calcium silicate, etc. White carbon black is a porous material, and its composition can be represented bySiO2 nH2O, where nH2O is in the form of surface hydroxyl groups exist. 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.

Silk black According to the production method, it is roughly divided into precipitation method silica and gas phase method silica. Vapor-phase white carbon black is white amorphous flocculent translucent solid colloidal nanoparticles (particles) under normal conditions.��Less than 100nm), non-toxic, and has a huge specific surface area. Vapor-phase silica is all nano-silica, with product purity up to 99% and particle size up to 10~20nm, but the preparation process is complex and expensive; precipitation silica is divided into traditional precipitation silica and precipitation silica. Special precipitation method silica, the former refers to silica produced using sulfuric acid, hydrochloric acid, CO2 and water glass as basic raw materials, while the latter refers to silica produced using hypergravity technology, sol-gel method, chemical crystal method, and secondary crystallization Silica produced by special methods such as the method or the reverse micelle microemulsion method. Precipitated silica is mainly used as a reinforcing agent for natural rubber and synthetic rubber, toothpaste friction agent, etc. Fumed silica is mainly used as a reinforcing agent for silicone rubber, coatings and unsaturated resin thickeners. Ultrafine silica gel and aerogel are mainly used as coating matting agents, thickeners, plastic film opening agents, etc.