Silicon Metal Powder is a fine, gray to dark gray metallic powder produced by grinding high-purity silicon metal. It has a metallic luster, high melting point, excellent heat resistance, strong oxidation resistance, and high electrical resistivity, making it a valuable industrial raw material.It is widely used in refractory materials, powder metallurgy, steelmaking, aluminum alloy production, chemical industry (silicones), and high-tech applications such as semiconductors and solar materials.Depending on grade and application, the silicon content typically ranges from 98% to 99.9%+ purity, with controlled levels of Fe, Al, and Ca impurities. Particle sizes are available from 20 mesh to 600 mesh (or finer powders like -325 mesh) as per industrial requirements.
It is also known as an “industrial glutamate” because of its essential role across multiple manufacturing sectors, especially where heat resistance, strength, and durability are required.
Description
Silicon Metal Powder is a fine grey to dark grey metallic powder obtained by crushing high-purity silicon metal. It is widely used in refractory products, steelmaking, aluminum alloys, and construction material additives (marbles, tiles, and cement-based materials) due to its high temperature resistance and strength enhancement properties.
Chemical Composition
| Element | Typical Content (%) |
|---|
| Silicon (Si) | 98.0 – 99.5% |
| Iron (Fe) | ≤ 0.2 – 0.8% |
| Aluminum (Al) | ≤ 0.1 – 0.7% |
| Calcium (Ca) | ≤ 0.02 – 0.3% |
Physical Properties
| Property | Specification |
|---|
| Appearance | Grey / Dark Grey Metallic Powder |
| Particle Size | 20 mesh – 600 mesh (or -325 mesh fine powder) |
| Melting Point | ~1410°C |
| Density | ~2.33 g/cm³ |
| Solubility | Insoluble in water |
| Odor | Odorless |
Applications
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Refractory materials (castables, bricks, kiln lining)
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Cement and construction additives
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Marble & tile strengthening materials
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Steel and iron metallurgy
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Aluminum alloy production
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Chemical industry (silicone production base material)
Key Features
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High temperature resistance
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Excellent oxidation resistance
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Improves hardness and durability of construction materials
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Enhances thermal shock resistance
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Good binding and strengthening effect in refractory mixes
Packaging
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25 kg PP bags
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1 MT jumbo bags (custom packing available)