Scope of application
Silicon carbide has four main application fields, namely: Functional ceramics , advanced refractory materials Abrasive materials And metallurgical raw materials. The coarse silicon carbide can already be supplied in large quantities, which cannot be regarded as high-tech products. However, the application of nano meter silicon carbide powder with high technology content cannot form economies of scale in a short time.
(1) As an abrasive, it can be used to Abrasive tool , such as grinding wheel , oilstone Grinding head , sand tiles, etc.
⑵ As metallurgical deoxidizer and high temperature resistant material.
⑶ High purity single crystal can be used to manufacture semiconductors and silicon carbide fibers.
Main application: used for 3-12 inch single crystal silicon, polycrystalline silicon, potassium arsenide, quartz crystal and other wire cutting. Engineering processing materials for solar photovoltaic industry, semiconductor industry and piezoelectric crystal industry.
It is used in semiconductor, lightning rod, circuit element, high temperature application, UV detector, structural material, astronomy, disc brake, clutch, diesel particulate filter, filament pyrometer, ceramic film, cutting tools, heating elements, nuclear fuel, jewelry, steel, protective gear, catalyst support and other fields.
Abrasive abrasive tool
It is mainly used for grinding and polishing of grinding wheels, abrasive papers, abrasive belts, whetstone, grinding blocks, grinding heads, grinding pastes, monocrystalline silicon, polycrystalline silicon in photovoltaic products and piezoelectric crystals in the electronic industry.
chemical industry
It can be used as deoxidizer for steelmaking, improver for preparation of cast iron, raw material for manufacturing silicon tetrachloride, and main raw material for silicone resin industry. Silicon carbide deoxidizer is a new type of strong composite deoxidizer, which replaces the traditional silicon powder and carbon powder for deoxidization. Compared with the original process, it has more stable physical and chemical properties, good deoxidization results, shortens deoxidization time, saves energy, improves steelmaking efficiency, and improves steel quality, It is of great value to reduce the consumption of raw and auxiliary materials, reduce environmental pollution, improve working conditions and improve the comprehensive economic benefits of electric furnaces.
"Three resistant" materials
On the one hand, silicon carbide can be used for various smelting furnace linings, high-temperature furnace components, silicon carbide plates, lining plates, supports, saggers, silicon carbide crucibles, etc.
On the other hand, it can be used as high-temperature indirect heating materials for non-ferrous metal smelting industry, such as vertical retort distillation furnace, distillation furnace tray, aluminum electrolytic cell, copper melting furnace lining, arc plate for zinc powder furnace, thermocouple protection tube, etc; It is used to make wear-resistant, corrosion resistant, high temperature resistant and other advanced silicon carbide ceramic materials; It can also make rocket nozzles, gas turbine blades, etc. In addition, silicon carbide is also one of the ideal materials for solar water heaters on highways and aircraft runways.
Non ferrous metals
Silicon carbide is used as indirect heating materials with high temperature resistance, high strength, good thermal conductivity and impact resistance, such as solid retort furnace, distillation tower tray, aluminum reduction cell, copper melting furnace lining, arc plate for zinc powder furnace, thermocouple protection tube, etc.
steel
With the characteristics of corrosion resistance, thermal shock resistance, wear resistance and good heat conduction of silicon carbide, the service life of silicon carbide for lining of large blast furnace is improved.
Metallurgical beneficiation
The hardness of silicon carbide is only second to diamond, and it has strong wear resistance. It is an ideal material for lining wear-resistant pipes, impellers, pump chambers, cyclones, and ore buckets. Its wear resistance is 5 to 20 times of the service life of cast iron and rubber. Def is also one of the ideal materials for aviation runways.
Building material ceramic grinding wheel industry
Making use of its thermal conductivity, thermal radiation, high thermal strength and large characteristics to manufacture thin plate kiln furniture can not only reduce the capacity of kiln furniture, but also improve the capacity of the kiln and product quality, shorten the production cycle, and is an ideal indirect material for baking and sintering ceramic glaze.
energy conservation
With good heat conduction and thermal stability, as a heat exchanger, the fuel consumption can be reduced by 20%, fuel can be saved by 35%, and productivity can be increased by 20-30%. In particular, the wear resistance of the discharge pipeline used in the mine concentrator is 6-7 times that of ordinary wear resistant materials.
Abrasive particle size and composition shall comply with GB/T2477-83. The particle size composition of abrasive shall be determined according to GB/T2481 -- 83.
Jewellery
Synthetic silicon carbide, also known as synthetic mullite and synthetic carborundum (chemical composition SiC), has a dispersion of 0.104 larger than diamond (0.044), a refractive index of 2.65-2.69 (diamond 2.42), and the same diamond luster,
