Lead-free200 Mesh Fine PowderSilicone Chemical FeedstockAluminum Alloy AdditionHigh Metallurgical Purity
98.5% pure silicon metal powder, 200 mesh and down. Used for aluminum alloy additions, silicone synthesis, silane production, and chemical manufacturing.
98.5% Minimum Silicon Metal Powder is a high-purity metallurgical grade silicon ground to 200 mesh and down (approximately 74 microns maximum particle size), with a lustrous metallic grey appearance. Silicon melts at 2,570°F (1,410°C) and has a density of 0.084 lbs/in³ (2.33 g/cm³). The fine powder form provides high surface area for chemical reactions and rapid dissolution in metal melts. In the aluminum industry, silicon powder is used for precision silicon additions to aluminum casting alloys where rapid dissolution and accurate chemistry control are required. It is also a primary raw material for the chemical industry — silicon metal is the feedstock for silane production (trichlorosilane and dichlorodimethylsilane), which are intermediates for silicone rubber, sealants, adhesives, lubricants, and resins. Silicon powder is used in the production of silicon carbide, fumed silica, and a wide range of silicon-containing compounds used in coatings, polishes, and cosmetics. Consistent iron and calcium impurity levels ensure reliable performance in both metallurgical and chemical manufacturing processes. Supplied as 200 mesh and down powder. Fine silicon powder presents a combustion hazard in dust form — appropriate dust control and explosion prevention measures are required.
Available Forms
200 Mesh and Down Powder
Product Code
SI98POWE
Technical Info
Thermal Properties
Melting Point (Solidus)2,570°F (1,410°C)
Melting Point (Liquidus)2,570°F (1,410°C)
Physical Properties
Density (imperial)0.084 lbs/in³
Density (metric)2.33 g/cm³
Primary ElementsSi
Lead FreeYes
Key Features
200 Mesh Fine PowderSilicone Chemical FeedstockAluminum Alloy AdditionHigh Metallurgical Purity
Frequently Asked Questions
Common technical inquiries regarding 98.5% Minimum Silicon Metal
Silicon powder (200 mesh, ~74 microns max) has dramatically more surface area per unit weight than 1" lumps, resulting in faster dissolution into aluminum melts. Powder is preferred when rapid, precise silicon additions are needed — for example, trim additions late in the melt cycle to hit a tight silicon target, or in furnaces with limited stirring capability. The tradeoff is higher oxidation loss potential and dust handling requirements compared to lumps.
Silicone production begins with the Müller-Rochow process, where silicon metal powder reacts with methyl chloride (CH₃Cl) in the presence of a copper catalyst at 250–350°C to produce chlorosilanes, primarily dimethyldichlorosilane. These chlorosilanes are then hydrolyzed and polymerized to produce polydimethylsiloxane (PDMS) — the base polymer of silicone rubber, sealants, and fluids. Silicon powder reactivity and purity directly affect chlorosilane yield and selectivity in this process.
Fine silicon powder is combustible and can form explosive dust-air mixtures. The minimum explosive concentration (MEC) for silicon dust is approximately 100–200 g/m³. Handling areas should be designed to prevent dust accumulation, with grounded equipment to prevent static discharge ignition. ATEX/NEC explosion-proof electrical equipment is required in areas where silicon dust clouds may form. NFPA 652 and 654 guidance on combustible dust applies to silicon powder storage and processing facilities.
High-purity SW grade tin powder. Melting point 449.5°F (231.9°C). Used for sintered components, friction materials, tin compound synthesis, and aerospace/electronics powder metallurgy.
99.85% pure tin powder, Forms: #100 atomized and 100 mesh grades. Melting point 449.5°F (231.9°C). Used for powder metallurgy, friction materials, soldering pastes, and sintered components.
High-purity cuprous oxide (Cu₂O) fine reddish-brown powder. Used as red ceramic glaze colorant, chemical catalyst, antifouling pigment, and copper chemical synthesis.
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