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Sericite is a new type of industrial mineral with a layered structure, which is a subspecies of muscovite in the mica family with extremely fine scales. The density is 2.78-2.88g / cm 3 , the hardness is 2-2.5, and the diameter-thickness ratio is> 50. It can be split into very thin flakes, with silk luster and smooth feeling, full of elasticity, flexibility, acid and alkali resistance, strong electrical insulation, heat resistance (up to 600 o C), and low coefficient of thermal expansion, and The surface has strong UV resistance, good abrasion resistance and wear resistance. The elastic modulus is 1505-2134MPa, the tensile strength is 170-360MPa, the shear strength is 215-302MPa, and the thermal conductivity is 0.419-0.670W. (MK) -1 . The main component is a potassium silicate aluminosilicate mineral, which is silver-white or grayish-white, in the form of fine scales. Its molecular formula is (H 2 KAl 3 (SiC4) 3. Themineral composition is relatively simple and the content of toxic elements is extremely low , No radioactive elements, can be used as green materials.