Overview of silicon carbide

Silicon carbide is a kind of typical covalent bond compound, which exists very little in nature and belongs to artificial synthetic material. Silicon carbide has many excellent properties, such as grinding resistance, high temperature resistance, corrosion resistance, high thermal conductivity, high chemical stability, wide band gap and high electron mobility, etc. Due to the exceptional hardness of silicon carbide, it was initially applied to a variety of grinding tools, such as grinding wheels, emery cloth, sand and various abrasives. It was widely used in material processing and grinding in the mechanical industry, and later as a reducing agent and heating element in iron and steel smelting. It has been found that it has a series of excellent properties such as high temperature thermal stability, high thermal conductivity, acid and alkali corrosion resistance, low expansion coefficient, good thermal shock resistance and so on.

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Pure silicon carbide is colorless transparent crystal, industrial silicon carbide is colorless, light yellow, light green, dark green, light blue, dark blue and even black, transparency degree decreases in turn. According to the color of the general silicon carbide is divided into black silicon carbide (domestic commonly used code C) and green silicon carbide (code GC) two categories. From colorless to dark green SiC are classified as green silicon carbide, dark blue to black are classified as black silicon carbide.

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SiC is a typical covalent bond compound, which has many excellent properties, such as grinding resistance, high temperature resistance, corrosion resistance, high thermal conductivity, high chemical stability, wide band gap and high electron mobility. So that it is widely used in abrasives, refractories, functional ceramics, metallurgical accessories and other industries, with the development of social economy and technology, silicon carbide will be used in more fields. China is a big producer of silicon carbide in the world, but in the low end of the silicon carbide industry chain for a long time, we need to achieve a new breakthrough in the silicon carbide high-end products, really do both have strong, promote the development of high quality silicon carbide industry.