Sericite is a layered silicate composed of two layers of silicon oxygen tetrahedra sandwiching a layer of aluminum oxygen octahedron, forming a complex silicon oxygen layer. It has the characteristics of small natural particle size and easy processing of ultrafine particles. Hardness 2-3. In addition, the chemical composition, structure, and texture of sericite are similar to kaolin, and it also has certain characteristics of clay minerals. It has good dispersibility and suspension in aqueous media and organic solvents, with white color, fine particles, and viscosity. Applied in coatings, it can improve the anti permeability and scratch resistance of the coating, and has good weather resistance and corrosion resistance. Applied to rubber and plastic products, it can reduce the shrinkage and warping rate of the products, improve their mechanical properties, heat resistance, insulation, chemical stability, and increase their surface glossiness and weather resistance.