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Silicon Carbide | AMERICAN ELEMENTS ®

Silicon Carbide

Silicon Carbide (SiC) is a compound of silicon and carbon with chemical formula SiC. It occurs in nature as the extremely rare mineral moissanite. Synthetic silicon carbide powder has been mass-produced since 1893 for use as an abrasive. Grains of silicon carbide can be bonded together by sintering to form very hard ceramics that are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests. Electronic applications of silicon carbide such as light-emitting diodes (LEDs) and detectors in early radios were first demonstrated around 1907. SiC is used in semiconductor electronics devices that operate at high temperatures or high voltages, or both.

Properties

Silicon carbide is a semiconductor material with a wide bandgap, high thermal conductivity, high electric field breakdown strength, and high maximum current density. These properties make SiC valuable in high-power and high-temperature electronic devices.

Physical Properties
  • High hardness (Mohs scale ~9)
  • High thermal conductivity
  • Low thermal expansion
  • Chemical inertness
Electrical Properties
  • Wide bandgap semiconductor
  • High breakdown electric field
  • High saturated electron drift velocity

Applications

Silicon carbide has diverse applications across multiple industries due to its unique combination of properties.

Abrasives and Cutting Tools

Used in grinding wheels, sandpapers, and cutting tools due to its extreme hardness.

Automotive

Used in ceramic brake discs, clutch systems, and as a material for high-temperature components.

Electronics and Semiconductors

Used in high-voltage, high-temperature power devices, RF devices, and as a substrate for LEDs.

Refractories

Used in furnace linings and other high-temperature applications due to its thermal stability.

Forms and Products

American Elements manufactures Silicon Carbide in numerous forms including:

  • Powders and nanopowders
  • Sputtering targets
  • Evaporation materials
  • Pellets and tablets
  • Custom shapes and sizes

Safety and Handling

Please review the Material Safety Data Sheet (MSDS) for proper handling and safety information. Silicon carbide is generally considered stable and non-reactive under normal conditions, but dust inhalation should be avoided.

Related Elements and Materials

Silicon Carbide is related to other carbon and silicon compounds and advanced materials.

Related Elements
  • Silicon
  • Carbon
Related Material Classes
  • Ceramics
  • Semiconductors
  • Abrasives
  • Refractories
  • Advanced Materials
PropertyValueUnit
CAS Number409-21-2
Chemical FormulaSiC
Molecular Weight40.10g/mol
Density3.21g/cm³
Melting Point2730°C (decomposes)
Band Gap2.86 - 3.23eV