Silicon Carbide

Silicon Carbide:

                         Silicon carbide (Sic), also known as carborundum is a compound of silicon and carbon with chemical formula Sic It occurs in nature as the extremely rare mineral moissanite. 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 as light-emitting diodes (LEDs) and detectors in early radios were first demonstrated around 1907 and today Sic is used in semiconductor electronics applications that are high-temperature, or high-voltage, or both. Large single crystals of silicon carbide can be grown by the Lely method; they can be cut into gems known as synthetic moissanite. Silicon carbide with high surface area can be produced from SiO2 contained in plant material.
                 Silicon Carbide is the only chemical compound of carbon and silicon. It was originally produced by a high temperature electro-chemical reaction of sand and carbon. Silicon carbide is an excellent abrasive and has been produced and made into grinding wheels and other abrasive products for over one hundred years. Today the material has been developed into a high quality technical grade ceramic with very good mechanical properties. It is used in abrasives, refractories, ceramics, and numerous high-performance applications. The material can also be made an electrical conductor and has applications in resistance heating, flame igniters and electronic components. Structural and wear applications are constantly developing. IN the U.S. and EKL in Berlin. Silicon carbide offered increased operating temperatures compared with metallic heaters. Silicon carbide elements are used today in the melting of glass and non-ferrous metal, heat treatment of metals, float glass production, production of ceramics and electronics components, igniters in pilot lights for gas heaters, etc.

 Physical properties:

Density (near room temp) (g/cm3)                             3.21
Melting Point (0C)                                                     2730
Crystal Structure                                                       Cubic
Thermal Conductivity (W m-1 K-1)                            3.6
Brinell hardness (Mpa)                                              45.5

Applications:

Abrasive and cutting tools
Structural material
Automobile parts
Electric systems
Electronic circuit element
Power electronic elements
LEDs
Astronomy
Heating elements
Nuclear fuel particles
Jewelry
Steel production
Grapheme production

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