新闻资讯

Silica is a general term for white amorphous powder silicic acid and silicate products, mainly referring to precipitated silica, fumed silica, ultrafine silica gel and aerogel, but also including powdered synthetic aluminum silicate and calcium silicate, etc.. Silica according to the production method is broadly divided into precipitated silica and fumed silica (scientific name: fumed silica).

Fumed silica is white amorphous flocculent semi-transparent solid gelatinous nanoparticles under normal conditions, non-toxic, with huge specific surface area (100-400m2/g). Fumed silica is all nano-sized silica, with a product purity of more than 99.8% and a primary particle size of 10-40nm. Precipitated silica is subdivided into traditional precipitated silica and special precipitated silica, the former refers to the production of silica with acid (sulphuric acid, hydrochloric acid, etc.), CO2 and water glass as the basic raw materials, and the latter refers to silica produced by using the supergravity technology, the sol-gel method, the chemical crystal method The latter refers to silica produced by special methods such as supergravity technology, sol-gel method, chemical crystal method, secondary crystallization method or reversed-phase micelle microemulsion method.