What is silicon carbide? Properties and uses of silicon carbide

ZhenAn editor will answer that Silicon carbide (SiC) is smelted at high temperatures in a resistance furnace using quartz sand, petroleum coke (or coal coke), and wood chips as raw materials. SiC also exists in nature as a rare mineral, moissanite. Silicon carbide is also called moissanite. Among contemporary non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and economical one. It can be called emery sand or refractory sand. Silicon carbide is smelted at high temperatures in a resistance furnace using raw materials such as quartz sand, petroleum coke (or coal coke), and wood chips (salt is required when producing green silicon carbide).

Including black silicon carbide and green silicon carbide, among which: black silicon carbide is made of quartz sand and petroleum coke as the main raw materials, and is smelted at high temperatures in a resistance furnace. Its hardness is between corundum and diamond, its mechanical strength is higher than corundum, and it is brittle and sharp. Green silicon carbide is made from petroleum coke as the main raw material, salt is added as an additive, and it is smelted at high temperatures in a resistance furnace. Its hardness is between corundum and diamond, and its mechanical strength is higher than corundum. Properties of silicon carbide

The service life is 1 to 2 times; the advanced refractory material made of it is thermal shock resistant, small in size, light in weight, high in strength, and has a good energy-saving effect. It is a deoxidizer with better performance compared with the same period last year. It can speed up the steelmaking speed, facilitate the control of chemical composition, and improve the quality of steel. In addition, silicon carbide is also widely used in producing silicon carbide rods for electric heating elements.

Silicon carbide is very hard and has excellent thermal conductivity. It is a semiconductor and can resist oxidation at high temperatures.

use

(1) As an abrasive, it can be used to make abrasive tools, such as grinding wheels, whetstones, grinding heads, sand tiles, etc.

(2) As metallurgical deoxidizer and high-temperature resistant material.

Silicon carbide has four main application areas, namely: functional ceramics, advanced refractory materials, abrasives, and metallurgical raw materials. At present, silicon carbide rough materials can be supplied in large quantities and cannot be regarded as high-tech products. However, the application of nano-scale silicon carbide powder with extremely high technical content is unlikely to achieve economies of scale in a short time.

(3) High-purity single crystals can be used to manufacture semiconductors and silicon carbide fibers.

Main uses: Used for wire cutting of 3-12-inch monocrystalline silicon, polycrystalline silicon, potassium arsenide, quartz crystal, etc. Engineering processing materials for solar photovoltaic industry, semiconductor industry, and piezoelectric crystal industry. Abrasives

You are mainly used for grinding and polishing grinding wheels, sandpaper, abrasive belts, whetstones, grinding blocks, grinding heads, grinding pastes, and monocrystalline silicon, polycrystalline silicon in photovoltaic products, and piezoelectric crystals in the electronics industry. The above is the relevant introduction to silicon carbide. For more detailed information, you can follow ZhenAn.