sepiolite clay powder price raw sepiolite
Chemical formula : (Si12)(Mg8)O30(OH)4(OH2)4·8H2O
Hydrous Magnesium Silicate Clay Minerals
Sepiolite powder is a layer chain structure of hydrated magnesium silicate clay minerals. Orthorhombic or monoclinic, generally in bulk, earthy or fibrous aggregates. The color is white, light gray, dark gray, brown, red, blue and green rose. The fresh surface is the pearl luster, after the weathering is the earthy luster. Hardness 2 ~ 3, density of 2 ~ 2.5g/cm3. With a sense of slip and astringent, sticky tongue. Dry brittle. Low shrinkage, good plasticity, larger than the surface, strong adsorption. Soluble in hydrochloric acid, light. Sepiolite has the advantages of stable decolorization, heat insulation, insulation, anti-corrosion, anti radiation and thermal properties. Mainly in marine sedimentary weathering reformed deposit; also appeared in hydrothermal veins.
Chemical Composition of Sepiolite fiber:
SiO2 Al2O3 Fe2O3 CaO MgO K2O Ig. loss
32.7% 1.21% 1.39% 24.69% 16.96% 0.1% 21.86
| Fiber Length (mm) |
1-3mm,2-4mm,4-7mm |
| Fiber Coefficient (K%) |
60 |
| Mineral Content(%) |
95 |
| Cashmere Content (%) |
40 |
| Sand Content (%) |
3 |
| Fiber Type |
Longitudinal fibers |
| Proportion |
2.58-3.2 |
| Tensile Stregth (Mpa) |
89.24-1283.7 |
| Dehydration Temperature(ºC) |
400-500 |
| Melting Conductivity (W/m.k) |
1200 |
| Resistivity (Ω·cm) |
Pv=5.9X106 |
| SiO2 (%) |
40-55 |
| MgO(%) |
15-25 |
| Loss on ignition (%) |
15-18 |
| CaO (%) |
15-22 |
| Base Vector (%) |
2.03 |
| Acid Vector (%) |
84.4 |
Physical Property of Sepiolite:
Fiber type : Longitudinal fiber
Colour : white, light gray, pale yellow
Specific : gravity 2-3.2
Hardness : 2-2.5
Dehydration : temperature 400-500ºC
Melting point : 1500-1700ºC
Tensile strength : 892.4-1283.7Mpa(medium strength)
Thermal conductivity : 0.038-0.046W/m*K
Electrical resistivity : Pv=5.9*106(Ω*cm)
Sepiolite powder used for friction material main technical indicators
1. Sepiolite composition:> 80%; 2. Particle size: 200 mesh (any particle size can be produced on demand) 3. Settling value: 800-850; 4. Moisture: <1.5%
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