What is vaporous silica?
Vapour silica is one of the most essential high-tech ultrafine inorganic new materials, with porous, non-toxic, tasteless and pollution-free, the average primary particle size of about 7-40 nano, specific surface area of 50 ~ 380m2/g, high product purity, SiO2 content is not less than 99.8%, is a kind of multi-functional additives. Vapour silica is a kind of ultrafine powder material obtained by hydrolysis and condensation of halosilane in hydrogen and oxygen flame at high temperatures. Because of its unique preparation process, it has a different structure and unique properties from other silica products.
Vapor-phase silica
Silica, by the gaseous process, is a nano-scale white powder produced by hydrolysis of silica halide in hydrogen and oxygen flame at high temperatures, commonly known as silica by the gaseous process. It is an amorphous silica product with a primary particle size between 7~40nm, an aggregate particle size of about 200-500 nm, a specific surface area of 100~400m2/g, and high purity. SiO2 content is not less than 99.8%. The vapour silica aggregate with an untreated surface comprises various silicon hydroxyl groups. One is an isolated, undisturbed free hydroxyl group; The second is connected, forming hydrogen bonds with each other bonded silicon hydroxyl group. The gas-phase silica aggregate with untreated surface contains multiple -OH, quickly including a uniform three-dimensional network structure (hydrogen bond) in the liquid system. This three-dimensional network structure (hydrogen bond) will be destroyed when there is an external force (shear force, electric field force, etc.), the medium will become thin, and the viscosity will decrease. Once the external force disappears, the three-dimensional structure (hydrogen bond) will recover by itself, and the density will rise; this thixotropy is reversible.
Vapor silica effectively facilitates flow
The surface activity of gaseous silica is high. Through modification treatment, the surface charge of gaseous silica can be adjusted because, in some specific coating applications, pigments or fillers also have particular activities, which can be together or combined. At this time, gaseous silica can neutralise the charge, preventing the accumulation or caking between the fillers. Further, improve the storage of pigments. In the powder coating, the vapour phase silicon dioxide can be used as an external additive, the vapour phase silicon dioxide particles adsorbed on the surface of the powder coating, the coating particles separated, play a role in promoting the effect of fluidity, part of the vapour phase silicon dioxide can also play a role in moisture-proof, avoid coating caking.
Price of Fumed silica
Fumed silica particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Fumed silica. A large amount of large amount will be lower. The Price of Fumed silica is on our company's official website.
Fumed silica supplier
Mis-Asia is a reliable and high-quality global chemical material supplier and manufacturer. It has over 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Fumed silica, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Fumed silica, you are welcome to contact us or inquire at any time.
