Introduction of silicon carbide

Silicon carbide is also known as carbon silicite, carborundum and refractory sand, which is made from quartz sand, petroleum coke and wood chips, etc. Silicon carbide has two common basic varieties of silicon carbide and green silicon carbide, both of which are alpha-sic. Silicon carbide has stable chemical performance, high thermal conductivity, small thermal expansion coefficient, good wear resistance, corrosion resistance, high temperature resistance, strength, good thermal performance, impact resistance and other properties.

Green or turquoise, translucent, six-square crystal, high hardness, strong cutting ability, stable chemical properties, good thermal conductivity; High purity and brittleness, it is suitable for grinding materials with high hardness and high brittleness. It is widely used to kill copper, aluminum, gemstones, optical glass, ceramic and other hard alloys, metal and hard and brittle non-metallic materials. The powder can also be used as a ceramic material.

Black silicon carbide is black or blue-black, harder than glass, and can be used as a glass knife. With black silicon carbide, green silicon carbide manufacturing methods but the purity of raw materials demand is higher, also in the resistance furnace under the high temperature of 2200 ° C to form, the Sic content is higher in black, physical properties similar to black silicon carbide, but the performance is slightly crispy in black, also has good thermal conductivity and electrical properties. Black silicon carbide is better than green silicon, silicon carbide is better than black silicon, and silicon is more pure than black silicon. Most of the materials used for processing tensile strength, such as glass, ceramics, stone material, refractory materials, cast iron and non-ferrous metals etc.

Silicon carbide purpose

Silicon carbide has four main applications: functional ceramics, advanced refractory materials, abrasive materials and metallurgical raw materials.

Abrasives: silicon carbide is mainly used for grinding wheel, abrasive paper, abrasive belt, abrasive, grinding, grinding head, grinding paste and monocrystalline silicon, polycrystalline silicon photovoltaic products and electronic industry of piezoelectric crystal aspects such as grinding, polishing, etc.

Chemical industry: silicon carbide can be used as tissue conditioner, steelmaking deoxidizer and cast iron can be used as manufacture of silicon tetrachloride raw material, is the main raw material of silicone industry. Silicon carbide deoxidizer is a new kind of compound deoxidizer, replaced the traditional solid silicon powder carbon powder, and compared with the original process of various physical and chemical performance is more stable, deoxidization effect is good, deoxidize shorter time, save energy and improve the efficiency of steel, improve the quality of steel, reduce raw material consumption, reduce environmental pollution, improve working conditions, improve the comprehensive economic benefits of the electric furnace has important value.

Wear-resisting, refractory and corrosion resistant material: using silicon carbide has corrosion resistance, high temperature resistance, strength, good thermal conductivity and impact resistance and other properties, silicon carbide on the one hand, can be used for all kinds of smelting furnace lining, high temperature furnaces artifacts, silicon carbide plate, plate, supports, sagger, silicon carbide crucible, etc. On the other hand, the high temperature of silicon carbide can be used in non-ferrous metal smelting industry indirect heating material, such as vertical distillation furnace, furnace distillation tray, aluminium electrolyzer, copper melting furnace lining, furnace zinc powder with arc plate, the thermocouple protection tube, etc. Silicon carbide is used for the manufacture of high grade carbon silicon ceramic materials such as wear-resisting, corrosion resistant and high temperature. The silicon carbide can also be made into rocket nozzle and gas turbine blades. In addition, silicon carbide is one of the ideal materials for high speed roads, airstrip and solar water heaters.

Non-ferrous metals: using silicon carbide has high temperature resistance, strength, good thermal performance, impact resistance, high-temperature indirect heating, such as strong retort furnace, tray distillation furnace, aluminium electrolyzer, copper melting furnace lining, furnace zinc powder with arc plate, the thermocouple protection tube, etc.

Steel: using the corrosion resistance of silicon carbide, the thermal shock resistant to wear and wear, the thermal conductivity is good, it is used in the large blast furnace lining to improve the service life.

Metallurgical beneficiation: silicon carbide hardness is second only to diamond, strong wear resistance, silicon carbide is wear-resisting pipe, the impeller, pump room, cyclone, ore bucket lined with ideal material, silicon carbide wear-resisting performance is cast iron, 5 -- 20 times the service life of rubber, silicon carbide is one of the aviation flight track ideal material.

Building materials: ceramic grinding wheel industry using silicon carbide coefficient of thermal conductivity, thermal radiation, the characteristics of high strength, manufacturing sheet kiln furniture, not only can reduce the capacity of kiln furniture, also improves the loading capacity of the kiln and the product quality, shorten the production cycle, silicon carbide ceramic glaze is baking sintering indirect materials ideal.

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