Silicon Carbide (SiC)

Silicon Carbide Formula:  SiC


  1. PreRish Tri Silicon Carbide is Produced in electric resistance furnaces with a mixture of coke, sand, sawdust, and a small amount of salt. It is blocky and sharp-edged. PEPL Also Produced It From Sic Crystals.
  2. It is extremely hard, has a high thermal conductivity and low thermal expansion. Not attacked by most acids and alkaline solutions. It dissociates in molten iron and steel. It oxidizes slowly in air above 800o

Silicon Carbide Typical Chemical Properties Available:

Purities available at PreRish Tri from a low purity metallurgical grade (90.0%), to 99.0% (black), 99.2% (black), 99.5% (dark green), 99.7% (light green), and up to 99.9995% for wafers and boule.

Silicon Carbide Typical Physical Properties Available:

Available irregular shaped powder, crystals, platelets, wafer and boule. Numerous size distributions are available from very coarse grits (1/2″ pieces) all the way down to 20-100 nanometer particles.

Silicon Carbide Nominal Physical Constants:

Molecular Weight (g/mol.)40.07
Bulk Density (g/cm3)1.25
True Density (g/cm3)3.2
Colordark green (black) to dark gray
Decomposition Point (°C)2300
Surface Area (m2/g) 
Thermal Conductivity (cal/s-cm-800°C)0.61
Mohs Hardness @20°C~9.1- 9.5
Specific Surface Area (m2/g)7-15
Specific Gravity3.22
Reaction Temperature (deg.C)> 2000
Crystallographyhexagonal- alpha & beta phase


Silicon Carbide Typical Applications:

  1. Bonded abrasive products, abrasive grits, blasting, lapping & honing compounds, semiconductor wafers, quartz crystals, hard metals, refractory’s, metallurgical purposes, production of exponential resistors, wire sawing, construction industry, a filler in plastics and composites, ceramic sintered parts, ferrites, soft metals, gettering, pump seals, valve components, electric heating elements, and lightning arresters
  2. Ceramic injection molding