JIAXING H&G BOND TRADING CO.,LTD
JIAXING H&G BOND TRADING CO.,LTD
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Grade:HGWD-1250
Product:High Quality Wollastonite Powder(Calcium metasilicate)
Decriptions
Wollastonite is a white to yellowish-brown naturally occurring mineral. It has good strength, firing characteristics and ability to reduce crazing. It is comprised chemically of calcium, silicon and oxygen. It's molecular formula can be expressed as CaSiO3 or as CaO.SiO2. It is commonly referred to as calcium metasilicate according to the now obsolete classification of silicates as oxyacids of silicon, a salt of hypothetical metasilicic acid: H2SiO3. It has a theoretical composition of 48.28% CaO and 51.72% SiO2.
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.
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.