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Silicon carbide

2020-03-31 09:23:52
Silicon carbide
Detailed introduction:

Carborundum, also known as silicon carbide (SiC), is made quartz sand, petroleum coke ( coal coke), wood chips (which need to be added with salt when producing green silicon carbide) through high temperature resistance furnaces. Liaoning talc powder silicon carbide also exists in nature as a rare mineral, moissanite. Silicon Carbide is also called Carborite. Among contemporary non-oxide high-tech refractory raw materials such as C, N, B, silicon carbide is the most widely used economical one, which can be called gold steel sand refractory sand. At present, silicon carbide produced by China's industry is divided into black silicon carbide green silicon carbide, both of which are hexagonal crystals with a specific gravity of 3.20 to 3.25 a micro hardness of 2840 to 3320 kg / mm2.

Because of its stable chemical properties, high thermal conductivity, small thermal expansion coefficient, good abrasion resistance, silicon carbide has many other uses besides abrasives, such as: coating silicon carbide powder on a turbine wheel cylinder block by a special process. The inner wall can improve its abrasion resistance extend its service life by 1 to 2 times. The high-grade refractory material used is made of heat-resistant shock, small size, light weight, high strength, good energy saving effect. Low-grade silicon carbide (containing about 85% of SiC) is an excellent deoxidizer. It can accelerate the speed of steelmaking, facilitate the control of chemical composition, improve the quality of steel. In addition, silicon carbide is also widely used to make silicon carbide rods for electric heating elements.


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