Sericite
1. Main properties: 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. The mineral composition is relatively simple and the content of toxic elements is extremely low, No radioactive elements can be used as green materials. Wancheng is an mica powder manufacturer.
2. Physical and chemical indexes of sericite powder
Dry silk
mica Main physical indicators
BaiDu(%) PH value Loss on ignition (%) Moisture (%)
> 75 6-8 4-6 < 0.8
Main chemical composition
SiO 2 Al 2 O 3 K 2 O Fe 2 O 3 S, P
60-75 13-17 4-5 < 1.8 0.02-0.03
Wet silk
mica Main physical indicators
BaiDu(%) Sand content (%) Attached water (%) PH value Loose density g / cm 3
> 80 < 0.5 < 0.5 6-8 0.4-0.5
Main chemical composition
SiO 2 Al 2 O 3 K 2 O Fe 2 O 3 Na 2 O
50-65 19-29 6-11 < 1 < 5
3.Main specifications: 100 mesh, 200 mesh, 325 mesh, 400 mesh, 600 mesh, 800 mesh, 1250 mesh, 2000 mesh, etc.
