Silicon Metal 1101 – Ultra-High Purity (Si ≥99.7%) for Electronics & Solar Industries
Premium silicon metal with minimum 99.7% silicon content, ultra-low impurities (Fe ≤0.10%, Al ≤0.10%, Ca ≤0.01%). Essential for electronics, solar-grade polysilicon, and high-tech applications.
| Main Composition | Si ≥99.7%, Fe ≤0.10%, Al ≤0.10%, Ca ≤0.01% (typical impurities) |
| Form | Lumps (10-100mm), Granules (2-15mm), Powder (0-2mm, 0-10mm), Custom sizes available |
| Application | Electronics, photovoltaic (solar) industry, silicone production, high-purity alloys |
| Standard | GB/T 2881-2014, ASTM A922, ISO 8288 |
Silicon Metal 1101 – Product Overview
Silicon Metal 1101 is an ultra-high purity metallurgical-grade silicon with a minimum silicon content of 99.7%. It is produced by carbothermic reduction of high-purity quartz in electric arc furnaces, followed by stringent refining processes. Our Silicon Metal 1101 features extremely low impurities (Fe ≤0.10%, Al ≤0.10%, Ca ≤0.01%) making it the preferred choice for high-tech applications, including the production of solar-grade polysilicon, electronic components, and high-performance silicones.
Product Core Advantages
- Ultra-High Purity: Minimum 99.7% Si with extremely tight impurity controls (Fe, Al, Ca) for critical high-tech applications.
- Versatile Application: Ideal for electronics, photovoltaic industry, and high-purity chemical synthesis.
- Custom Sizing: Available in lumps, granules, or powder to match your specific process requirements.
- Premium Quality: Suitable as a starting material for solar-grade silicon via the Siemens process or metallurgical refinement.
- Stable Supply: Produced in modern submerged arc furnaces with strict quality control from raw material to finished product.
Typical Application Areas
Silicon Metal 1101 is essential in high-technology industrial processes:
- Photovoltaic (Solar) Industry: Primary starting material for the production of solar-grade polysilicon after further purification (Siemens process or fluidized bed reactor).
- Electronics: Used in the manufacture of semiconductor-grade silicon and other electronic components requiring ultra-pure silicon.
- Silicones & Chemicals: Ideal for high-performance silicone polymers where low impurity levels are critical for catalyst efficiency and product quality.
- High-Purity Alloys: Used in specialty aluminum and steel alloys requiring minimal trace elements.
- Optical Fibers: As a precursor for silicon tetrachloride used in optical fiber production.
For specific application guidance or custom formulations, contact our technical team for personalized recommendations based on your production requirements.
Technical Specifications – Silicon Metal 1101 & Common Grades
Our Silicon Metal 1101 is produced to meet international standards with strict quality control. Below is the chemical composition of our primary grade (Si 1101) compared with other common industrial grades for reference.
Chemical Composition (Typical Values, % by weight)
| Grade / Designation | Si (%) | Fe (%) | Al (%) | Ca (%) | Typical Application |
|---|---|---|---|---|---|
| Si 1101 | ≥99.7 | ≤0.10 | ≤0.10 | ≤0.01 | Electronics, solar, ultra-pure applications |
| Si 97 | ≥97.0 | ≤1.5 | ≤1.2 | ≤0.3 | Aluminum alloys, general use |
| Si 331 | ≥98.5 | ≤0.30 | ≤0.30 | ≤0.10 | High-purity aluminum alloys, chemical |
| Si 441 | ≥99.0 | ≤0.40 | ≤0.40 | ≤0.10 | Standard grade for aluminum, silicones |
| Si 553 | ≥98.5 | ≤0.50 | ≤0.50 | ≤0.30 | General metallurgical, cost-sensitive |
Physical Properties
| Property | Value | Unit |
|---|---|---|
| Melting Point | 1410-1450 | °C |
| Density (at 20°C) | 2.33 | g/cm³ |
| Appearance | Silvery-gray metallic lumps / granules | - |
| Bulk Density (lumps) | 1.2-1.5 | g/cm³ |
Available Sizes
- Lumps: 10-80mm,10-100mm(standard), custom sizes available
- Granules: 2-15mm, 1-6mm
- Powder: 0-2mm, 0-10mm, -100 mesh, -200 mesh
- Custom Sizes: Available upon request to meet specific process requirements
Application Guidelines – Silicon Metal 1101
Silicon Metal 1101 is a high-purity material with the following primary applications:
Photovoltaic (Solar) Industry
As the preferred starting material for solar-grade polysilicon production, Si 1101's ultra-low impurity levels reduce the refining burden in the Siemens process or metallurgical purification routes, enabling higher efficiency solar cells.
Electronics & Semiconductor
Used as a base material for the production of electronic-grade silicon (EGS) and as a raw material for silicon wafers after further zone refining.
High-Performance Silicones
In the chemical industry, Si 1101 is ground to fine powder and reacted with methyl chloride to produce methylchlorosilanes. The extremely low impurity levels (especially Fe, Al, Ca) are critical for achieving high catalyst efficiency and consistent polymer quality.
Optical Fibers
Used as a precursor for silicon tetrachloride (SiCl₄), which is a key raw material in the production of optical fibers.
Specialty Alloys
In high-performance aluminum and titanium alloys where trace element contamination must be minimized, Si 1101 provides the necessary purity.
Typical Addition Rates
In high-purity aluminum alloying, addition rates typically range from 2% to 10% depending on the target alloy specification. Our technical team can assist with optimal sizing and addition practices for maximum recovery and purity preservation.
Packaging & Logistics – Silicon Metal 1101
Packaging Options
We offer various packaging solutions to meet different customer requirements and ensure product integrity during transportation, especially important for high-purity grades:
- 1‑ton Jumbo Bags: Common option, easy to handle with standard equipment.
- 25kg / 50kg Bags: For smaller orders or specific application requirements (e.g., laboratories, pilot plants).
- Custom Packaging: We can accommodate special packaging requests, including moisture-proof liners, vacuum packaging, or small drums to prevent contamination.
Logistics Information
| Parameter | Details |
|---|---|
| Minimum Order Quantity | 10 metric tons (less for trial orders, subject to availability) |
| Lead Time | 15-20 days after order confirmation |
| Port of Loading | Main Chinese ports (Tianjin, Shanghai, Qingdao, Huangpu) |
| Shipping Options | FOB, CIF, CFR, DAP (depending on destination) |
| Payment Terms | T/T, L/C at sight, or negotiable |
Download Center
Access our technical documentation for detailed product information:
Frequently Asked Questions – Silicon Metal 1101
Is it possible to entrust a third-party inspection to check the quality before shipment?
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Certainly, we support third-party inspections by internationally recognized quality inspection agencies such as SGS and BV to verify product quality before shipment. The inspection covers product appearance, weighing, dimensions, and chemical composition analysis. The entire inspection process will be documented with photos and written records, which will be provided to you together with the final inspection report. This ensures you have no concerns regarding product quality.
What is the difference between Silicon Metal 1101 and lower purity grades like 441 or 553?
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Silicon Metal 1101 is an ultra-high purity grade with Si≥99.7% and extremely low impurities (Fe ≤0.10%, Al ≤0.10%, Ca ≤0.01%). Grades like 441 (Si≥99.0%, Fe≤0.4%, Al≤0.4%, Ca≤0.1%) and 553 (Si≥98.5%, Fe≤0.5%, Al≤0.5%, Ca≤0.3%) have higher impurity allowances. Si 1101 is required for applications where trace elements can affect performance, such as solar-grade silicon production, electronics, and high-performance silicones.
Can Silicon Metal 1101 be used directly for solar cell production?
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No, Silicon Metal 1101 is metallurgical-grade silicon. For solar cell production, it must undergo further purification to become solar-grade silicon (SoG-Si, typically 6N to 9N purity) via processes like the Siemens method or metallurgical refinement. However, its ultra-low impurity levels make it the ideal starting material for this purification, reducing cost and energy consumption.
What sizes are best for the silicone industry when using Si 1101?
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For the direct process, silicon is typically ground to a fine powder, often between 0-2 mm or -100 mesh. However, the optimal size distribution can vary depending on the reactor design (fluidized bed vs. stirred bed). We can supply custom-sized powders and work with you to define the specification that matches your process while maintaining purity.
Do you provide a certificate of analysis with each shipment?
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Absolutely. Every batch of Silicon Metal 1101 is tested in our ISO 17025 accredited laboratory, and a Certificate of Analysis (COA) showing Si, Fe, Al, Ca, and other trace elements is provided with the shipping documents. Additional impurity testing can be arranged upon request.
What is your production capacity for Silicon Metal 1101?
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We have an annual production capacity exceeding 20,000 metric tons of high-purity silicon metal, including Si 1101. We can accommodate both containerized and bulk vessel shipments with consistent quality.
Do you offer special packaging to maintain purity during transport?
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Yes, for high-purity grades like Si 1101, we recommend moisture-proof liners and sealed bags to prevent contamination. We can also provide vacuum packaging or small drums for critical applications. Please discuss your specific requirements with our sales team.
Why Choose Our Silicon Metal
20+ Years Experience
Specialized in ferroalloy production with deep industry knowledge
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Every batch tested to ensure consistent composition and performance
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Silicon Metal Different Grades Comparison
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