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Silicon Carbide (SiC) is a material that is used in a variety of industries. It has many useful properties. The most important characteristics are high corrosion resistance and low thermal expansion coefficient. In addition, silicon carbide has good abrasion resistance.
Silicon Carbide is widely used as an abrasive in manufacturing and polishing, such as in glass and metal polishing. It also exhibits excellent thermal conductivity and has good thermal shock resistance. This property makes it a perfect material for large-scale optical mirror applications. Moreover, it is a non-combustible substance.
Silicon carbide is produced by the reaction of finely ground carbon and silica sand in a high temperature furnace. The process produces a very dense crystalline substance with a gray color.
It is insoluble in water, molten iron, and alkalis. It can be reacted with other compounds to produce additional SiC.
Chemical vapour deposition can produce wear-resistant layers of SiC. Aside from these, silicon carbide is used in a variety of high-temperature electronic equipment, such as light emitting diodes. Moreover, it is also a refractory material for non-ferrous metals.
Silicon Carbide is classified into two major types. The first is the diamond-like structure. Other structures include polytypes, which have different stacking arrangements.
Polytypes are formed by stacking silicon carbide tetrahedra. These tetrahedra have interesting electrical properties. Moreover, they are highly resistant to most acids. They are stacked in such a way that they form a polar structure.
There are several hundred structures of silicon carbide. Some of these are found in the Canyon Diablo meteorite.