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■ Muscovite(white mica)
Because of high insulation strength, acid-base corrodibility resistance, elasticity, tenacity, heat-resistance, sound insulation, and strong adhesive force, muscovite can be used in many industries such as electric insulation, heat insulation, paint, plastic, rubber, ceramic, petroleum, drilling, electric welding rod, cosmetic and space navigation.
Chemical components:
|
Chemical composition |
SiO2 | Al2O3 | K2O | Fe2O3 | CaO | Na2O | MgO | H2O |
| Contents(%) | 47.32 | 33.25 | 11.82 | 1.81 | 0.03 | 0.96 | 0.91 | 2.7 |
Physical properties:
| Density (g/m3) | Refractive index | Whiteness (%) | Moisture (%) | Radius-thickness ratio | Heat Resistance (° C) | L.O.I. (%) |
| 2.80 | 1.60 | 70-80 | <1% | >60 | 1300 | 2.82-2.9 |
■ Phlogopite (golden mica)
Phologopite can be divided into two types: fuscous phologopite (all types of brown and green) and light coloured phologopite (all types of light yellow). Light coloured phologopite is transparent and has vitreous luster, fuscous phologopite is semitransparent, vitreous luster to metallic luster. Pure phologopit is very good insulation material.
Chemical components:
|
Components |
SiO2 | Al2O3 | MgO | K2O | H2O |
| Contents% | 36-45 | 10-17 | 19-27 | 7-10 | <1 |
Physical properties:
| Density(g/cm3) | Transparency (%) | Mosshardness | Whiteness | Refractive index | Coefficient of elasticity (10 6Pa) |
| 2.7-2.9 | 0-25.5 | 2.78-2.85 | 60-70 | 1.6-1.55 | 1394.5-1874 |
■ Sericite
Sericite are extensively used in electric welding rod, rubber, plastic, anti-fire coating, paint, ceramic, heat preservation, cosmetic, pigments, paper, textile, metallurgy, and many other industries.
General chemical components:
| Components | SiO2 | Al2O3 | K2O+Na2O | H2O |
| Contents% | 43.13~49.04 | 27.93~37.44 | 9~11 | 4.13~6.12 |
Dry sericite chemical components:
| Components | Al2O3 | SiO2 | Fe2O3 | K2O | S | P |
| Contents% | ≥13.0 | ≤75.0 | 1.0-3.0 | 4.0 | 0.03 | 0.03 |
Dry sericite physical properties:
| Subjects | PH | whiteness | Bulk density | Adhesive rate |
| indicators | 6.5-7.5 | ≥73.0% | 0.20-0.25g/ml | ≤1.5% |
Wet sericite chemical components:
|
Components |
Al2O3 | SiO2 | Fe2O3 | K2O | CaO |
| Contents% | ≥25.0 | ≤55.0 | 1.5-3.0 | 7.0-9.0 | 1.5-3.0 |
Wet sericite physical properties:
|
Subjects |
PH | Density | Bulk density | Whiteness | Adhesive rate |
| Indicators | 5.0-7.0 | 2.6-2.7g/ml | 0.20-0.25g/ml | ≥75.0% | ≤1.5% |
■ Biotite
Biotite is black, fuscous brown, and sometimes with a little light red, green, or other tint. Transparent to semitransparent, ?with vitreous luster or metallic luster. Hardness: 2-3, density: 3.02-3.12g/cm3, they are usually used in construction padding.
Chemical components:
|
Components |
SiO2 | Al2O3 | K2O | MgO | Na2O | S | P | Burn |
| Contents% | 45.02 | 10.46 | 10.18 | 16.88 | 0.46 | 2.43 | 0.34 | 1.93 |
Mica powder:
Wet mica powder physical and chemical indicators:
|
Size |
Screen margin (%) | Sand Content (%) | Bulk density (g/cm3) | Water content (%) | Loss on Ignition (%) | Whiteness | Radius-thickness ratio |
| 125um (120 mesh) | 250um <0.1 125um | ≤1.0 | ≤0.3 |
≤1.0 |
≤4.3 |
>70 |
|
| 90um (160 mesh) | 180um< 0.190um | ≤1.0 | ≤0.25 | ||||
| 75um (200 mesh) | 150um< 0.1 75um | ≤0.6 | ≤0.23 | ||||
| 45um (325mesh) | 112um< 0.145um | ≤0.5 | |||||
| 38um (400mesh) | 75um< 0.1 38um | ≤0.5 |
Dry mica powder physical and chemical indicators:
|
Size |
Screen margin (%) |
Fe contents 1X10” |
Sand Content (%) | Bulk density (g/cm3) | Water content (%) | Whiteness | Radius-thickness ratio |
| 900um (20 mesh) | ≤0.5 | ≤400 | ≤0.5 | ≤3.0 |
≤1.0 |
>60 |
>60 |
| 450um(40 mesh) | ≤0.5 | ≤400 | ≤1.0 | ≤3.0 | |||
| 300um(60 mesh) | ≤0.5 | ≤800 | ≤1.0 | ≤3.0 | |||
| 150um(100mesh) | ≤0.5 | ≤800 | ≤1.0 | ≤0.25 | |||
| 75um (200mesh) | ≤1.0 | ≤800 | ≤1.0 | ≤0.25 | |||
| 45um(325mesh) | ≤2.0 | ≤400 | ≤1.0 | ≤0.22 | |||
| 35um(400mesh) | ≤5.0 | ≤400 | ≤0.5 | ≤0.22 | |||
| 28um(500mesh) | ≤5.0 | ≤300 | ≤0.5 | ≤0.22 | |||
| 23um(600mesh) | ≤5.0 | ≤300 | ≤0.5 | ≤0.22 | |||
| 18um(800mesh) | ≤10.0 | ≤300 | ≤0.5 | ≤0.22 | |||
| 13um(1000mesh) | ≤10.0 | ≤300 | ≤0.5 | ≤0.22 |
Applications of mica powder:
Mica powder are extensively used in many industries such as mica ceramic materials, plastic, rubber, construction materials, paint padding, drilling fluid additives, paper, cosmetic and so on.
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