Molecular Formula: Si
Molecular Weight: 28.09
CAS No.: 7440-21-3
HS Code: 2804.69
Payment Terms: T/T, L/C
Trade Terms: FOB, CFR, CIF
MOQ: 20GP ≈ 20-25MT
Packing Options: 25kg/1000kg bags, Palletizing, Customization
1. Basic Product Information
Product Name: Metal Silicon/Industrial Silicon/Crystalline Silicon
Chemical Name: Silicon Metal
Appearance: Silver-gray metallic lumpy solid with bright metallic luster, uniform texture, no impurities, no oxidation black skin. Hard and brittle, stable texture, clean section, and good ductility for further processing. Custom lump and particle sizes are available.
Product Introduction: Metal Silicon (Industrial Silicon) is a metallic raw material smelted from high-purity quartz sand and carbon reducing agents through submerged arc furnace high-temperature reduction. It is divided into different grades according to the content of iron, aluminum and calcium impurities, including mainstream 553, 441, 3303, 2202 grades. With stable metallic properties, high purity and low impurity characteristics, it is non-corrosive and high temperature resistant. As an indispensable basic raw material for organosilicon chemical industry, aluminum alloy metallurgy, photovoltaic new energy and electronic semiconductor industry, it features stable batch quality, wide industrial adaptability and high cost performance, and is widely used in high-end manufacturing and modern industrial fields worldwide.
2. Physical and Chemical Properties
Metal silicon is a silver-gray crystalline metallic material with stable physical and chemical properties. It has a melting point of 1414℃ and a boiling point of 2355℃, featuring excellent high-temperature resistance and thermal stability. It possesses stable resistivity, high hardness, and good mechanical processing performance. Under normal temperature, it is chemically inert with stable performance, not easily oxidizing or deteriorating. It can react with halogens, strong alkalis, and oxidants under high-temperature conditions. With low impurity content, uniform internal structure, and good alloying and reduction activity, it exhibits excellent compatibility in metallurgical smelting and chemical synthesis. The product features stable density, pure texture, no volatile substances, is safe and environmentally friendly, suitable for long-term storage and industrial continuous processing.
3. Executive Standards & Technical Specifications
Executive Standard: GB/T 2881-2014 Industrial Silicon Metal
Main Product Grades: 553#, 441#, 3303#, 2202#,1101#
Typical Technical Index
4. Core Product Characteristics
1. High Purity & Ultra-low Impurity Control
Adopting high-quality quartz raw materials and closed smelting process, the product strictly controls iron, aluminum, calcium and other harmful impurities. Each batch maintains stable purity and consistent index, effectively avoiding impurity interference on downstream product quality. High-purity grades fully meet the production requirements of high-end organosilicon, photovoltaic and semiconductor industries.
2. Stable Physical & Chemical Activity
The product has a uniform crystal structure, stable high-temperature resistance, and strong reducibility. It features excellent deoxidation, alloying, and synthetic activity, stable reaction efficiency in metallurgy and chemical production, no abnormal reactions, and can effectively improve the stability and qualification rate of finished products.
3. Strict Batch Consistency
Through standardized smelting, cooling, sorting and screening procedures, all batches maintain stable texture, uniform particle size and consistent physical indicators. No large fluctuation of indexes, which ensures stable production operation of downstream customers and avoids quality deviation of finished products.
4. Excellent Process Adaptability
Good melting performance and strong alloying ability, easy to melt and mix evenly in aluminum alloy smelting. Stable reaction efficiency in organosilicon synthesis, high conversion rate and low loss. Suitable for automated assembly line production and large-scale industrial continuous processing.
5. High Temperature Resistance & Oxidation Resistance
With ultra-high melting point and strong high-temperature stability, it is not easy to oxidize and decompose in high-temperature working environment. It can maintain stable structural performance under extreme temperature conditions, suitable for high-temperature smelting and high-end material synthesis scenarios.
6. Safe & Environmentally Friendly
The product is non-toxic, non-radioactive, free of harmful volatile substances, compliant with international environmental protection standards. No pollution during processing and application, safe for industrial production and commercial use.
5. Main Application Fields
Aluminum Alloy Metallurgy Industry
It is the most important alloying element for aluminum alloy production, widely used in cast aluminum and wrought aluminum industries. It can significantly improve the fluidity, hardness, wear resistance and tensile strength of aluminum alloy, refine alloy structure, reduce casting defects, and is widely used in automobile hubs, engine parts, aerospace aluminum materials, mechanical equipment and architectural aluminum profiles.
Organosilicon Chemical Industry
It is the core raw material for synthesizing methyl chlorosilane, the foundational monomer of silicone industry. It is further processed into silicone rubber, silicone oil, silicone resin, silane coupling agent and other products, widely used in construction waterproofing, electronic insulation, medical and health care, daily chemicals, new composite materials and other fields.
Photovoltaic & New Energy Industry
As the primary raw material for polysilicon and monocrystalline silicon production, it is the basic material of solar photovoltaic panels. It is also used for silicon-carbon anode materials of lithium batteries, effectively improving battery energy density and cycle life, supporting the rapid development of new energy photovoltaic and energy storage industry.
Steel & Refractory Industry
Used as high-efficiency deoxidizer and alloy additive for steelmaking, purifying molten steel, improving steel toughness and magnetic conductivity. It can also be used as antioxidant and reinforcing agent for refractory materials to enhance high-temperature structural stability of refractory products.
Electronic & High-tech Industry
High-purity metal silicon is used for semiconductor silicon wafers, integrated circuits, electronic components and optical fiber manufacturing, serving as the core basic material of modern electronic information industry.
Other Industrial Fields
Widely used in ceramic modification, abrasive materials, welding materials, precision casting and other industries, with strong industrial universality and high market applicability.