Silicon carbide is also called corundum sand or refractory silicon carbide is using quartz sand petroleum coke or coal tar sawdust (green silicon carbide production need to add salt) in the Canon of high-temperature resistance furnace smelting from such as raw materials at present, the industrial production of silicon carbide can be divided into two black silicon carbide and green silicon carbide, are the six-party crystal, specific gravity of 3.20 ~ 3.25, the microhardness of 2840 ~ 3320 kg/was.
Silicon carbide, due to its stable chemical properties, high thermal conductivity, small thermal expansion coefficient and good abrasion resistance, has many other USES besides being used as abrasive material. For example, applying silicon carbide powder to the inner wall of hydraulic turbine impeller or cylinder can increase its wear resistance and extend service life by 1-2 times.Made of high - grade refractory materials, heat shock, small size, light weight and high strength, energy - saving effect.Low grade silicon carbide (about 85% of SiC) is an excellent deoxidizer, which can speed up the steelmaking process, control the chemical composition and improve the quality of steel.In addition, silicon carbide is also widely used in making silicon and carbon 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 temperature.
(1) as abrasive material, it can be used for grinding tools, such as grinding wheel, whetstone, grinding head, sand tile, etc.
(2) as metallurgical deoxidizer and heat resistant material.