What are the main use of silicon carbide? Emery silicon carbide including black silicon carbide and green silicon carbide, including: black silicon carbide, quartz sand and petroleum coke and high quality silica as the main raw material, through the resistance furnace and. Its hardness between corundum and diamond, mechanical strength higher than corundum, brittle and sharp. Green silicon carbide is made of petroleum coke and high quality silica as the main raw material. The hardness between corundum and diamond, mechanical strength higher than corundum. So what are the main uses of silicon carbide?

　　1, abrasive - mainly because silicon carbide has high hardness, chemical stability and toughness, so can be used in the manufacture of silicon carbide bonded abrasives, coated abrasives and free grinding, to glass, ceramics, stone processing, iron and non-ferrous metal, hard alloy, titanium alloy, high speed steel cutting tool and grinding wheel etc..

　　2, refractory material and corrosion resistant materials, mainly because of silicon carbide with a high melting point (resolution), chemical inertness and heat shock resistance, so can be used for silicon carbide abrasives, ceramics kiln used in slab and sagger, zinc smelting industry vertical distillation furnace cylinder with silicon carbide and aluminum electrolytic, crucible lining small pieces of material such as silicon carbide furnace, ceramic products.

　　3, the use of chemical - because silicon carbide can dissolve in molten steel and molten steel in the oxygen, metal oxide reaction to generate carbon monoxide and silicon containing slag. Therefore, the utility model can be used as a purifying agent for smelting iron and steel, which is used as a deoxidizing agent for steel making and an improvement agent for cast iron. This generally uses low purity silicon carbide to reduce costs. At the same time, it can also be used as raw material for producing four silicon chloride.

　　4, electrical purposes - used as heating elements, nonlinear resistance components and high semiconductor materials. The heating elements such as silicon carbide (1100 to 1500 DEG C for the work of a variety of nonlinear resistance element, the electric stove), all kinds of valve arrester.

　　Carbon / carbon - silicon carbide composite material is carbon fiber reinforced carbon and silicon carbide ceramic matrix composite material , it appears in early 1980s as the thermal structure of materials with low density, good oxidation resistance, corrosion resistance, excellent high temperature mechanical properties and thermal physical properties, good self-lubricating performance and other advantages, it is a new high temperature structural materials and functional materials which can be used in the 1650℃. As the brake disk material , the carbon / carbon - silicon carbide composite material not only has the advantages such as carbon disk density is small, stable brake wear, the rate of weight loss is small and large heat capacity , but also it overcome the high hygroscopicity of the carbon disc, low friction coefficient in wet hygrometric state , low static friction coefficient, lack of adaptability, so it’s taken the lead in the F16 fighter. Silicon carbide ceramic matrix material use a silicon carbide impregnation process based on the carbon / carbon material , it use carbon fiber as reinforcement, silicon carbide as the matrix material, its performance has exceeded the current application of carbon / carbon brake disk material.

　　The carbon / carbon-silicon carbide ceramic brake disks can make the braking response more sensitive and the braking effect is more obvious. At the same time, it also has excellent resistance to power attenuation. The service life of the brake disks is longer than the ordinary brake disks, and it has stronger durability because the maintenance cost is lower. The body weight of the vehicles can be reduced 15 kg after equipping with the carbon / carbon - silicon carbide ceramic matrix brake disk, it reduce the unsprung mass and improve the power weight ratio without increasing engine power so that the overall performance of the vehicles and handling are promoted.

　　The application of carbon - carbon / silicon carbide ceramic matrix material: brake disk materials: including aircraft brakes (military and civil aircraft brakes), helicopter rotor, a new generation brake system of of the tanks, the train brake disk (EMU and fast train), car brakes (in luxury cars, cars, large truck truck etc.).