   
- Silicon Carbide Synonyms:
silicon carbide powder, SiC, silicon carbide crystal, green silicon carbide powder, black silicon carbide powder, CAS# 409-21-2, silicon carbide wafer, silicon carbide boule, fused silicon carbide, alpha phase, beta phase, silicon carbide platelet, silicon carbide fiber, silicon carbide grit, silicon carbide powder, SiC, silicon carbide crystal
SiC
- Silicon Carbide Description:
1) Produced in electric resistance furnaces with a mixture of coke, sand, sawdust, and a small amount of salt. It is blocky and sharp edged. Also 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 800 deg.C.
- Silicon Carbide Typical Chemical Properties Available:
Various purities available 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 as irregular shaped powder, crystals, platelets, wafer and boule. Numerous size distributions available from very coarse grits (1/2" pieces) all the way down to 20-100 nanometer particles.
- Silicon Carbide Nominal Physical Constants:
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Molecular Weight (g/mol.)
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40.07
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Bulk Density (g/cm3)
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1.25
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True Density (g/cm3)
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3.2
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Color
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dark green (black) to dark gray
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Decomposition Point (°C)
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2300
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Surface Area (m2/g)
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Thermal Conductivity (cal/s-cm-800°C)
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0.61
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Mohs Hardness @20°C
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~9.1- 9.5
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Specific Surface Area (m2/g)
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7-15
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Specific Gravity
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3.22
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Reaction Temperature (deg.C)
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> 2000
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Crystallography
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hexagonal- alpha & beta phase
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- Silicon Carbide Typical Applications:
1) Bonded abrasive products, abrasive grits, blasting, lapping & honing compounds, semiconductor wafers, quartz crystals, hard metals, refractories, 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
- Silicon Carbide Typical Packaging:
Drums, bags, drums, super sacks & loose bulk
- Silicon Carbide TSCA (SARA Title III) Status:
Listed.
- NIOSH Pocket Guide to Chemical Hazards (SiC):
Visit this External NIOSH Link
- Silicon Carbide CAS Number:
CAS# 409-21-2
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