Silicon carbide

Base Information

• Chemical Name: Silicon carbide
• CAS No.: 409-21-2
• Deprecated CAS: 12504-67-5,145583-77-3,146915-55-1,148031-02-1,152024-73-2,154643-50-2,156131-38-3,160073-05-2,167972-08-9,215780-01-1,37231-85-9,54500-13-9,63686-94-2,66039-27-8,76647-55-7,78544-49-7,84149-55-3,86755-24-0,92843-12-4,259092-53-0,288149-69-9,95918-00-6,1192824-22-8,1356922-63-8,1402835-26-0,1454308-15-6,1894216-33-1,1962125-53-6,577973-56-9,2242727-07-5,2245272-65-3,2268704-52-3,2387639-53-2,2455522-11-7,2488905-64-0,1192824-22-8,1356922-63-8,1402835-26-0,145583-77-3,146915-55-1,148031-02-1,152024-73-2,154643-50-2,156131-38-3,160073-05-2,167972-08-9,215780-01-1,259092-53-0,288149-69-9,37231-85-9,54500-13-9,63686-94-2,66039-27-8,76647-55-7,78544-49-7,84149-55-3,86755-24-0,92843-12-4,95918-00-6
• Molecular Formula: CSi
• Molecular Weight: 40.10
• Hs Code.: 28492000
• European Community (EC) Number: 206-991-8
• ICSC Number: 1061
• DSSTox Substance ID: DTXSID5052751
• Wikipedia: Silicon carbide
• Wikidata: Q412356
• Mol file: 409-21-2.mol

Synonyms:Crystar;silicon carbide

Chemical Property of Silicon carbide

Chemical Property:

• Appearance/Colour: light grey powder
• Melting Point: 2700 °C(lit.)
• Refractive Index: 2.6500
• PSA: 0.00000
• Density: 3.22 g/mL at 25 °C(lit.)
• LogP: -0.29950
• Solubility.: Soluble in molten sodium hydroxide, potassium hydroxide and in m
• Water Solubility.: Soluble in molten alkalis (NaOH, KOH) and molten iron. Insoluble in water.
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 1
• Rotatable Bond Count: 0
• Exact Mass: 39.976926534
• Heavy Atom Count: 2
• Complexity: 10

Purity/Quality:

99% ^*data from raw suppliers

Silicon carbide (alpha phase), 0.2-1.2 microns (99%-Si) ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xi
• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Mineral Dusts -> Other Mineral Dusts
• Canonical SMILES: [C-]#[Si+]
• Inhalation Risk: A nuisance-causing concentration of airborne particles can be reached quickly when dispersed.
• Effects of Short Term Exposure: May cause mechanical irritation.
• Uses: Silicon carbide (SiC), nearly as hard as diamonds, is used as an abrasive in grinding wheels and metal-cutting tools, for lining furnaces, and as a refractory in producing nonferrous metals. ▼▲ Industry Application Role/benefit Abrasive machining processes Processing of glass, ceramic, stone, refractory, hard alloy, etc. Abrasive and cutting tools/durability and low cost Electronic Light-emitting diodes Component/electroluminescence property Semiconductor devices Component/has wide forbidden band (2.86 EV) and p and n two conductive types Electric systems Gapped SiC lightning arresters Resistance/voltage-dependent property Sic switches and SiC Schottky diodes Raw material/anti high-temperature and high-voltage properties Ceramics Hard ceramics used for composite armor, bulletproof vests, etc. Raw material/low density and high strength Temperature ceramics Raw material/has high intensity at High temperature Astronomy Astronomical telescopes Mirror material/low thermal expansion coefficient, high hardness, rigidity and thermal conductivity Aerospace Gas filter and combustion chamber nozzle Raw material/anti high-temperature property Silicon carbide fibre Reinforcing of metal,resin,alloy,glass,etc. Reinforcing material/helps to improve all kinds of features Heat shield material, high temperature filter cloth and conveyor belt Raw material/anti high-temperature property Automobile Brake discs Ingredient/helps to increase temperature resistance Sintered form for diesel particulate filters Ingredient/anti high-temperature property Oil additive Helps to educe friction, emissions, and harmonics Carbon Graphene production Raw material Manufacture of biochar Coating material/helps to improve the Hardness, strength and wear resistance Alchemy blast furnace brick Raw material/anti high-temperature property Graphite electrode production Coating component/increase the coating capacity of rapid temperature change Others Thin filament pyrometry Filament material/anti high-temperature property Nuclear fuel particles Ingredient/anti high-temperature property Nuclear fuel cladding Synthetic moissanite gemstone Raw material/similar to diamond in several important respects Steel production Additional fuel/allows the furnace to process more scrap with the same charge of hot metal Catalyst support Support material/large surface area Carborundum printmaking Paste material for ink plate Silicon carbide is widely used as an abrasive in grinding and cutting glasses; in polishing glass and sharpening stones. It is used in the manufacture of porcelain, refractory brick, furnace linings, and emery paper. The compound also is used in semiconductor technology. Manufacture of abrasives and refractories, brake linings, heating elements, and thermistors.
• Description: Silicon carbide is a hard covalently bonded material predominantly produced by the carbothermal reduction of silica. Silicon carbide is made by heating silica sand and petroleum coke packed around electrodes in an electric resistance furnace to above 2200°C. Depending on the exact reaction conditions the resulting silicon carbide is either a fine powder or a bonded mass that requires crushing and milling to produce a usable feedstock. This material is very resistant to abrasion and to corrosion with a molten slag. It also has excellent resistance to thermal spalling. However as it is a carbide, it will oxidise readily, silicon carbide has a fairly high conductivity. Several hundred structures of silicon carbide (polytypes) have been identified which have different stacking arrangements for the silicon and carbon atoms. The simplest structure is a diamond structure which is designated /3-SiC. Other structures are either hexagonal or rhombic and are referred to as a-SiC.
• Physical properties: the properties of silicon carbide are that it is a refractory material (high melting point), it has excellent thermal conductivity and low thermal expansion, consequently it displays good thermal shock resistance. In addition, the high hardness, corrosion resistance and stiffness lead to a wide range of applications where wear and corrosion resistance are primary performance requirements. Silicon carbide possesses interesting electrical properties due to its semiconductor characteristics, the resistance of different compositions varying by as much as seven orders of magnitude.