Appearance: Metallic dark grey Particle: <45um, 45um-75um, 75um-120um,>120um Application: Silicon nitride, silicon carbide 1. Formula: Si2. Appearance: Metallic dark grey3. Particle: <45um, 45um-75um, 75um-120um,>120um 4. Packing: Steel drum, 200kg/drum or 250kg/drum5. Application: Silicon nitride,silicon carbide, (silicon titanium alloy, silicon aluminum alloy and other alloys), organic silicon, ...