High-Purity Silicon Metal 99.999%

Description

1. Product Overview
High-Purity Silicon Metal 99.999% (5N) is an ultra-refined, semiconductor-grade metalloid produced through advanced zone refining and directional solidification processes. It serves as the critical raw material for high-performance electronics, solar-grade ingots, and specialty alloy systems where trace impurity control directly determines end-device reliability. With its exceptional purity eliminating 99.999% of metallic contaminants (Fe, Al, Ca, Cu, P, B), this product delivers the strategic advantage of minimizing defect rates and maximizing energy conversion efficiency—making it indispensable for Tier-1 photovoltaic and compound semiconductor supply chains.

2. Key Specifications & Technical Characteristics

• Chemical composition: Si ≥ 99.999%; individual impurities: Fe ≤ 0.5 ppm, Al ≤ 0.5 ppm, Ca ≤ 0.3 ppm, Cu ≤ 0.1 ppm, P ≤ 0.3 ppm, B ≤ 0.2 ppm, C ≤ 5 ppm

• Purity grade: 5N (99.999%) – meets SEMI PV17-0219 and ASTM F1592 standards

• Physical characteristics: Metallic gray irregular lump; standard size: 10–100 mm (custom 2–25 mm available); density: 2.33 g/cm³; electrical resistivity: > 0.01 Ω·cm

• Packaging options: 1 MT anti-static woven big bags with inner PE liner; 25 kg sealed vacuum-sealed aluminum foil bags; export-worthy wooden pallets

• Shelf life: 24 months when stored below 30°C in dry, inert environment (humidity < 40%)

3. Core Industrial Applications

• Semiconductor epitaxial wafers: Enables low-defect monocrystalline silicon for IGBTs and power MOSFETs—reduces leakage current by 30% versus 4N material

• High-efficiency monocrystalline PV cells (n-type TOPCon/HJT): Achieves minority carrier lifetime > 1.5 ms, directly boosting module efficiency > 24%

• Sputtering targets for display coatings: Eliminates micro-arcing during deposition, improving thin-film transistor yield by > 12%

• Specialty aluminum-silicon alloys (aerospace/EV battery housings): Provides finer grain structure and 40% higher thermal conductivity than standard metallurgical silicon

4. Competitive Advantages

• Quality consistency: Every batch is ICP-OES and GDMS tested with traceable Certificate of Analysis; lot-to-lot variation maintained below ±0.3 ppm for all critical dopants

• Supply reliability: Integrated production from quartz mining to refining; 10,000 MT annual capacity; buffer stock held in Rotterdam, Houston, and Shanghai

• Logistics capability: Door-to-door delivery via air freight (2–5 days) for urgent R&D samples or 20 ft/40 ft containers (15–25 days) for bulk orders

• Price competitiveness: Direct-from-furnace pricing removes 2–3 intermediary margins; long-term contracts (12–36 months) include fixed quarterly price adjustment clauses

• Sustainability: 100% hydro-powered reduction furnaces; carbon footprint verified at 6.8 kg CO₂/kg Si (industry average: 12.4 kg); zero-liquid-discharge processing

• Technical support: Dedicated metallurgists available for application troubleshooting; free characterization reports (FTIR, SIMS upon request)

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 1 MT (sample-grade: 25 kg available for qualification trials)

• Bulk loading capacity (per 20 MT shipment): 20 MT = 20 metric tons net weight (one full 20 ft dry container, palletized 1 MT per bag)

• Lead time: 5 working days for stock material (Rotterdam/Shanghai) ; 15 working days for furnace-to-order

• Incoterms: EXW (Ningxia/Shanghai), FOB (Shanghai), CIF (any major global port), DDP (volume-dependent)