Sericica is a kind of fine grain white cloud scale, silk silk luster, diameter ratio> 80, specific ratio 2.6-2.7, hardness 2-3, (001) complete, can be split into extremely thin sheet; flexible, flexible, heat resistance up to 600℃, acid and alkali resistance, strong electrical insulation, good wear resistance and wear resistance.In addition, the chemical composition, structure and structure of sericite are similar to kaolin, so sericite has some characteristics of clay minerals: good suspension in large water media and organic solvents, fine white color, viscosity, etc.