The difference between the principle and process of producing white carbon black by gas phase method and precipitation method

There is essentially no difference between the silica produced by the gas phase method and the silica produced by the precipitation method, and the chemical name is silica. But the gas phase method is to use silicon tetrachloride and air to burn the silicon dioxide, the fineness is more than 1000 mesh, and the precipitation method is to use sodium silicate to add sulfuric acid to precipitate the silicon dioxide. The fineness is only 300-400 mesh. Silica produced by fumed silica is expensive and not easy to absorb moisture. Used as a matting agent in coatings. Precipitated silica is cheap and easy to absorb moisture. It can only be used in rubber and plastic products to fill, reinforce and so on. But now I found that a new type of silica has appeared on the market. The fineness is nanoscale, the price is cheaper than that of the gas phase method, and it has a wide range of applications. It can be used for coatings, rubber and plastics.