Grade:HGWD-2000
Product:High Quality Wollastonite Powder(Calcium metasilicate)
Decriptions
Wollastonite is an industrial mineral comprised chemically of calcium, silicon and oxygen. Its molecular formula is CaSiO3 and its theoretical composition consists of 48.28% CaO and 51.72% SiO2. Natural wollastonite may contain trace or minor amounts of various metal ions such as aluminum, iron, magnesium, potassium and sodium. Wollastonite is rarely found by itself and generally contains other minerals like calcite, garnet and diopside that are removed during processing.
Wollastonite is an inorganic needle-like mineral, and wollastonite products have very noticeable acicular and long fiber structures .It is characterized by non-toxicity, chemical corrosion resistance, good thermal stability and dimensional stability, glass and pearl luster, low water absorption and oil absorption value, excellent mechanical and electrical properties,even reinforcing effect. Wollastonite products with long fibers and easy separation, low iron content and high whiteness.
Wollatonite is Widely used in plastics, rubber, asbestos substitutes, paint coatings and other fields, it can increase the hardness, flexural strength, impact resistance of products, improve the electrical properties of materials, improve thermal stability and dimensional stability, and is the most promising application field. It is also used in the ceramics and metallurgical industries. The SiO2 and CaO components in wollastonite provide low expansion rate and good thermal shock resistance.
Application
Wollastonite is used for many different industrial purposes, including the production of:
Engineering technical plastics
Fluoro elastomer e.g. for oil sealing
heat-resistant refractory ceramics
metallurgy
wood composites
adhesives
filler in paint, paper and other products
friction products such as brake pads
Advantages
a. good compatibility.
b. Excellent Stability and products meets clients requirement absolutely
c. Excellent performance on physical properties
Properties
| Item |
Mesh-325 |
Mesh-325 |
Mesh-1000 |
Mesh-1250 |
Mesh-2000 |
Mesh-2500 |
Mesh-3000 |
| Density g/cm3 |
2.8-2.9 |
2.8-2.9 |
2.8-2.9 |
2.8-2.9 |
2.8-2.9 |
2.8-2.9 |
2.8-2.9 |
| Mohs Hardness |
4.5 |
4.5 |
4.5 |
4.5 |
4.5 |
4.5 |
4.5 |
| Whiteness (R45T%) |
88±2 |
88±2 |
88±2 |
88±2 |
88±2 |
88±2 |
88±2 |
| Oil Absorption Rate (ml/100g) |
50 |
≦55 |
≦55 |
≦55 |
≦55 |
≦55 |
≦55 |
| Particle Size |
D50(um) |
D50(um) |
D50(um) |
D50(um) |
D50(um) |
D50(um) |
D50(um) |
| Refractive Index |
1.63 |
1.63 |
1.63 |
1.63 |
1.63 |
1.63 |
1.63 |
| PH |
9.9 |
9.9 |
9.9 |
9.9 |
9.9 |
9.9 |
9.9 |
| Coefficient of expansion(mm/mm/℃) |
6.5 x 10-6 |
6.5 x 10-6 |
6.5 x 10-6 |
6.5 x 10-6 |
6.5 x 10-6 |
6.5 x 10-6 |
6.5 x 10-6 |
| Aspect Ratio |
3.1-6.1 |
3.1-6.1 |
3.1-6.1 |
3.1-6.1 |
3.1-6.1 |
3.1-6.1 |
3.1-6.1 |
| Melting Point |
1540 |
1540 |
1540 |
1540 |
1540 |
1540 |
1540 |
| Chemical Properties |
| Fe2O3 |
0.38% |
0.38% |
0.38% |
0.38% |
0.38% |
0.38% |
0.38% |
| Al2O3 |
0.32% |
0.32% |
0.32% |
0.32% |
0.32% |
0.32% |
0.32% |
| CaO |
45.70% |
45.70% |
45.70% |
45.70% |
45.70% |
45.70% |
45.70% |
| MgO |
1.39% |
1.39% |
1.39% |
1.39% |
1.39% |
1.39% |
1.39% |
| SiO2 |
50.61% |
50.61% |
50.61% |
50.61% |
50.61% |
50.61% |
50.61% |
| L.O.I |
1.41 |
1.41 |
1.41 |
1.41 |
1.41 |
1.41 |
1.41 |
Remark:The properties can be customized according with client’s requirements.
Product Tags:
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Mesh 2000 Wollastonite Powder CaSiO3 Chemical Corrosion Resistance Images
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