Introduction and application range of silicon carbide

Emery, also known as silicon carbide (SiC), is made of quartz sand, petroleum coke (or coal coke), wood chips (salt needs to be added when producing green silicon carbide) and other raw materials through resistance furnace high temperature smelting. Silicon carbide also exists in nature as a rare mineral, moissanite. Silicon carbide is also called moissanite. Among the non-oxide high-tech refractory raw materials such as C, N, B, etc., silicon carbide is widely used and economical, and can be called corundum or refractory sand. At present, the silicon carbide produced in China is divided into black silicon carbide and green silicon carbide, both of which are hexagonal crystals, with a specific gravity of 3.20-3.25 and a microhardness of 2840-3320kg/mm2.

Applications: Functional ceramics, advanced refractories, abrasives and metallurgical raw materials. Coarse silicon carbide has been supplied in large quantities and cannot be regarded as a high-tech product, and the application of nano-scale silicon carbide powder with extremely high technical content cannot form economies of scale in a short time.

·As an abrasive, it can be used to make abrasive tools, such as grinding wheels, oil stones, grinding heads, sand tiles, etc.

·As metallurgical deoxidizer and high temperature resistant material

·High-purity single crystal, which can be used to make semiconductors and silicon carbide fibers

Main application: used for wire cutting of 3-12 inches single crystal silicon, polycrystalline silicon, potassium arsenide, quartz crystal, etc. Engineering processing materials for solar photovoltaic industry, semiconductor industry, and piezoelectric crystal industry. For semiconductors, lightning rods, circuit components, high temperature applications, UV light detectors, structural materials, astronomy, disc brakes, clutches, diesel particulate filters, filament pyrometers, ceramic membranes, cutting tools, heating elements, nuclear fuel , jewelry, steel, protective gear, catalyst carrier and other fields.

Abrasive abrasives: mainly used for grinding and polishing of grinding wheels, sandpaper, abrasive belts, oil stones, grinding blocks, grinding heads, abrasive pastes, monocrystalline silicon, polycrystalline silicon in photovoltaic products, and piezoelectric crystals in the electronics industry.