The chemical composition of the mica is XY 2-3 [Z4O10 ]( OH), 2, clan layers of form silicate general name of mineral of structure on crystal brilliant to belong to monocline. The mica is usually tabular, slice , post form brilliant shape of false six square or rhombuses. Color various, glass gloss , solve and pay attention to surface pay the gloss of pearl, Transparent or semitransparent. A group of extremely complete parallel bottom surface solves and pays attention to, the thin slice is full of elasticity. Rub 2-3 hardness, than in weight 2.7-3.1. Have strong electric conductivity and fire-resistant. There is a lot of kind , it was the muscovite that used at most on industry, utilized its insulation and heat resistance mainly on industry, Resist sour, resist alkaline, resist and press and shell person who divide , use as electric equipment and electrician insulating material of apparatus; Secondly is used for making the part on the stove window and machinery of steam boiler , smelting furnace. Garrulous mica and mica powder can be processed into Zh's mother paper, can replace the mica sheet and make various kinds of insulatings material with cheap ,even in thickness cost . In addition , the garrulous mica is also used as packing in paint , rubber , plastics ,etc . and construction material extensively.
B.Chemical composition of the mica:
Composition SiO2 Al2O3 Fe2O3 K2O CaO Na2O MgO H2O
Content (%) 46.2 35.6 1.0 8.62 0.82 0.93 0.75 2.0
C.Physics techno-guideline:
Index Bulk density Moisture Loss on ignition White degree Grain size Proportion PH
Content <0.25g/cm3 <0.5% <2.0% >65 95 2.8 g/cm3 6.5-8
D.Use of the mica powder
The mica powder is very extensive in the domestic and international market use, Used in industrial fields, such as building materials industry, paint, rubber, plastics, welding rod, fire extinguishing agent, electronic product, oil well drilling, pearly-lustre pigment,etc.