High Purity Si Metal Powder 99.7% For Alloy Refining
Uniform composition ensures smooth reactivity and stable performance.
Crafted for manufacturers focused on precision, efficiency, and consistent output.
Technical Overview and Application Value of Si Metal Powder
These high-purity Si Metal Powders are produced using advanced crushing, magnetic separation, and multi-stage purification. With a silicon purity of 99.7%, they provide high reactivity, excellent heat resistance, and reliable chemical stability. The product is commonly used in aluminum-silicon alloys, silicone-based materials, and specialized refractories.
Their consistent size and clean surface promote easy blending, low oxidation, and better flow performance during processing. In chemical production, these granules act as a pure silicon source for polymers and coatings, ensuring steady chemical conversion rates. Each shipment is tested for purity, particle distribution, and moisture content to maintain international export quality.
Physical and Chemical Specifications of Si Metal Powder
| Parameter | Standard Range | Industrial Function |
|---|---|---|
| Si Purity | ≥ 99.7% | Ensures high performance in metal and chemical processing |
| Fe | ≤ 0.16% | Improves mechanical properties and corrosion resistance |
| Al | ≤ 0.12% | Maintains clarity and color in silicone synthesis |
| Ca | ≤ 0.05% | Reduces slag formation during smelting |
| C | ≤ 0.02% | Enhances consistency during high-temperature processing |
| Average Particle Size | 35–55 µm | Enables smooth dispersion and uniform reaction |
| Bulk Density | 1.27 g/cm³ | Ensures stability in automated material feeding |
| Moisture | ≤ 0.07% | Prevents caking and preserves flowability |
| Appearance | Silver-gray granules | Smooth metallic sheen, fine texture |
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FAQ
1. What are the main uses of Si Metal Powder 99.7%?
They are widely used in aluminum alloy refining, silicone compound manufacturing, and refractory production.
2. Can you adjust particle size or purity for specific processes?
Yes. We can customize granule size and purity between 99.5% and 99.8% according to your needs.
3. How do you ensure product quality for export?
Each lot undergoes ICP testing, moisture inspection, and particle analysis with a COA included.
4. What packaging is used for international shipments?
25 kg PE-lined kraft bags or 1-ton jumbo sacks, sealed, palletized, and shrink-wrapped for transport.
5. Why choose your company as a supplier?
We combine stable product quality, fast delivery, professional technical support, and responsive customer service.
Our qualifications

CE

ISO9001

ISO14001

ISO45001

SGS
Contact Us for Inquiries and Cooperation
Please share your desired purity range, particle size, and port of delivery. Our export specialists will prepare a customized quotation, provide analysis reports, and arrange secure logistics to ensure your silicon micro granules reach you safely and efficiently.
📩 Email: sale@zaferroalloy.com
🌐 Get in touch today to request a quotation or product specification sheet
- we will respond within 24 hours.
Let's work together to achieve better results in your metallurgical and chemical production processes.
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