Physical Properties of silicon metal powder
(1) High Purity & Composition
Typical Purity: Ranges from 98% to 99.9999% (6N), with impurities (Fe, Al, Ca) decreasing as purity increases.
Impact: Higher purity improves performance in electronics and solar cells.
(2) Particle Size & Morphology
Size Range: From coarse (150–2000 µm) to ultrafine/nano (<10 µm or <100 nm).
Morphology:
Angular particles (milled powder) – Better for metallurgical bonding.
Spherical particles (atomized powder) – Improved flowability for 3D printing.
Impact: Finer powders increase reactivity and surface area, crucial for batteries and chemicals.
(3) Density & Melting Point
Density: ~2.33 g/cm³ (lower than metals like iron, beneficial for lightweight alloys).
Melting Point: 1,414°C, making it stable in high-temperature applications (e.g., refractories).
Chemical Properties of silicon metal powder
(1) High Reactivity
Reacts with oxygen (forms SiO₂ layer), halogens (e.g., chlorine for SiCl₄), and alkalis.
Impact: Essential for silicone production and chemical synthesis.
(2) Oxidation Resistance
Forms a passive SiO₂ layer in air, preventing further corrosion.
Impact: Enhances durability in alloys and coatings.
(3) Semiconductor Behavior
Intrinsic silicon has limited conductivity, but doping (B, P) adjusts its electrical properties.
Impact: Fundamental for electronics and solar cells.
Functional Advantages of silicon metal powder
(1) Alloy Strengthening
Improves hardness, wear resistance, and castability in Al-Si and Fe-Si alloys.
Example: Automotive pistons made from Si-rich aluminum alloys.
(2) Thermal & Electrical Performance
High thermal conductivity (~150 W/m·K) – Useful in heat-resistant materials.
Adjustable resistivity (via doping) – Critical for semiconductors.
(3) Lightweight & High Strength
Silicon-reinforced composites offer high strength-to-weight ratios, ideal for aerospace.
Hot Tags: features of silicon metal powder, China features of silicon metal powder manufacturers, suppliers, factory, metallic silicon powde, Silicon Metal 421, Silicon Metal Powder 98, Pure Silica Powder 325 mesh, High Purity Silicon Metal Powder 98, Pure Silica Powder