Silicon Carbide

Silicon carbide powder is higher than corundum in abrasives and second only to diamond, cubic boron nitride and boron carbide. The density is generally considered to be gram/mm 3, and the natural packing density of silicon carbide abrasive is between gram/mm 3.The composition of silicon carbide is mainly based on petroleum coke and high-quality silica as the main raw materials, adding salt as an additive, through the resistance furnace high temperature smelting. Its hardness is between corundum and diamond 1, mainly used for 3-12 inches of monocrystalline silicon, polysilicon, potassium arsenide, quartz crystal wire cutting. It is the engineering processing material of solar photovoltaic industry, semiconductor industry and piezoelectric crystal industry.The analysis and detection method of silicon carbide is: the content of silicon carbide in silicon carbide determines the hardness of silicon carbide mill, the particle size of silicon carbide has a great influence on wire cutting, but the important thing is the particle shape of silicon carbide. Because the shape change of silicon carbide for free state cutting particles has an important impact on cutting efficiency and cutting quality.

The raw materials used in black silicon carbide have higher purity requirements, similar physical properties to green silicon carbide, but the performance is slightly more brittle than black, and also has better thermal conductivity and semiconductor characteristics, suitable for processing carbide, glass, ceramics and non-metallic materials, but also for semiconductor materials, high temperature silicon carbon rod heating body, far infrared source substrate and so on.Black silicon carbide according to the shape can be divided into flat grinding wheel, bevelled grinding wheel, cylindrical grinding wheel, cup grinding wheel, disc grinding wheel, etc.; According to the bond can be divided into ceramic grinding wheel, resin grinding wheel, rubber grinding wheel, metal grinding wheel, etc., its characteristic parameters are abrasive, viscosity, hardness, bond, shape, size and so on.

Black silicon carbide particle size sand is quartz sand, petroleum coke as the main raw materials, through the resistance furnace high temperature smelting into silicon carbide raw block, and then through the machine grinding processing broken through the screen, acid and alkali washing to form different specifications of silicon carbide particle size sand.The hardness of silicon carbide sand is between corundum and diamond, the mechanical strength is higher than corundum, brittle and sharp, with a certain electrical conductivity and thermal property.

Green silicon carbide powder Features:1, pure silicon carbide is colorless, and the industrial brown to black is due to the impurity of iron. Green silicon carbide powder is green, crystal structure, high hardness, strong cutting ability, stable chemical properties, good thermal conductivity.2, the microscopic shape is hexagonal crystal, the Mohs hardness of silicon carbide is 9.2, the Vickers microhardness is 3000-3300 kg/mm 2, the Knop hardness is 2670-2815 kg/mm, the microhardness is 3300 kg per cubic mm.3, green silicon carbide due to chemical stability, high thermal conductivity, small thermal expansion coefficient, good wear resistance, the use of good thermal conductivity and thermal stability, as a heat exchanger, fuel consumption is reduced by 20%, fuel saving 35%, the rate increased by 20-30%.