White carbon black is actually silicon dioxide, but it is not ordinary silicon dioxide. It is silicon dioxide with a certain branching structure. From the perspective of preparation methods, it can be divided into precipitated white carbon black and fumed white carbon black. As far as the current situation is concerned, precipitated silica is mainly used for green tires. If it is used with silane coupling agent, it can reduce the rolling resistance of tires and improve puncture resistance, but the wear resistance is worse than that of carbon black formula. The fumed silica is mainly used for silicone rubber, light, white and color tires, and of course, it is also widely used in coatings, cosmetics and inks. In addition to its dyeing and tinting properties, it also has thixotropy. Because the particle size and structure of silica can be adjusted, and its surface functional groups can also be adjusted, it can be selected according to needs.