What is fumed silica

Since the German Degussa Company successfully developed the production technology of gaseous phase SiO2 in 1941, the total annual production of gaseous phase SiO2 in the world has exceeded 150000 tons in 2007, and the production technology is highly concentrated. The global market is mainly controlled by a few companies such as German Degussa, Wacker, U.S. Cabot, and Japan Tokuyama, and the technology is also tightly controlled. A basic model for developing gaseous phase SiO2 globally is the close relationship between production enterprises, organosilicon monomers, and post-processing enterprises. The producers of gaseous phase SiO2 use the by-products from the production process of organosilicon monomer factories as the primary raw materials to prepare gaseous phase SiO2. In contrast, the by-product HCl generated during the production process of gaseous phase SiO2 is returned to the organosilicon monomer factories for the synthesis of organosilicon; after this external vapor phase SiO2 product comes out, it is widely used in the post-processing of organic silicon products, forming a virtuous cycle of resource utilization and mutual promotion of development. Therefore, Cabot and Degussa are the largest gas-phase SiO2 producers near the world's largest organosilicon enterprise, Dow Corning, and GE's monomer factories. At the same time, Wacker is a manufacturer of two major categories of products. Vapor phase silicon dioxide (commonly known as vapor phase white carbon black in China, from now on referred to as vapor phase SiO2) is a fine, particular amorphous silicon dioxide product produced by the high-temperature hydrolysis of halosilane in a hydrogen-oxygen flame. The original particle size of this product is between 7-40nm, the specific surface area is generally in the range of 100m2/g~400m2/g, the product purity is high, and the SiO2 content is not less than 99.8%. It is a significant inorganic nanopowder material. Due to their superior stability, reinforcement, thickening, and thixotropy are widely used in rubber, plastics, electronics, coatings, medicine, agriculture, and CMP. Vapor phase SiO2 generally has two types of products, hydrophilic and hydrophobic, wherein hydrophobic products are obtained through surface chemical treatment using hydrophilic products. If you are looking for high quality, high purity and cost-effective fumed silica, or if you require the latest price of fumed silica, please feel free to email contact mis-asia.