Silicon Carbide Application Scope
Silicon carbide has four main application areas, namely: functional ceramics, advanced refractory materials, abrasives and metallurgical raw materials. Silicon carbide coarse materials can be supplied in large quantities and cannot be considered high-tech products, and the application of nano-scale silicon carbide powder with extremely high technical content is unlikely to form economies of scale in a short period of time.
⑴ As an abrasive, it can be used to make grinding tools, such as grinding wheels, oilstones, grinding heads, sand tiles, etc.
⑵ As a metallurgical deoxidizer and high-temperature resistant material.
⑶ High-purity single crystals can be used to manufacture semiconductors and silicon carbide fibers.
Main uses: used for wire cutting of 3-12 inch single crystal silicon, polycrystalline silicon, potassium arsenide, quartz crystals, etc. Engineering processing materials for the solar photovoltaic industry, semiconductor industry, and piezoelectric crystal industry. Used in semiconductors, lightning rods, circuit components, high temperature applications, ultraviolet detectors, structural materials, astronomy, disc brakes, clutches, diesel particulate filters, filament pyrometers, ceramic films, cutting tools, heating elements, nuclear fuels, jewelry, steel, protective gear, catalyst carriers and other fields.
Abrasives and grinding tools
Mainly used for grinding and polishing of grinding wheels, sandpaper, sand belts, oilstones, grinding blocks, grinding heads, grinding pastes, and single crystal silicon, polycrystalline silicon in photovoltaic products and piezoelectric crystals in the electronics industry.
Chemicals
It can be used as a deoxidizer for steelmaking and a modifier for cast iron structure. It can be used as a raw material for the manufacture of silicon tetrachloride and is the main raw material for the silicone resin industry. Silicon carbide deoxidizer is a new type of strong composite deoxidizer, which replaces the traditional silicon powder and carbon powder for deoxidation. Compared with the original process, its physical and chemical properties are more stable, the deoxidation effect is good, the deoxidation time is shortened, energy is saved, the steelmaking efficiency is improved, the quality of steel is improved, the consumption of raw and auxiliary materials is reduced, environmental pollution is reduced, working conditions are improved, and the comprehensive economic benefits of electric furnaces are improved. It has important value.
“Three-resistant” materials
Silicon carbide has the characteristics of corrosion resistance, high temperature resistance, high strength, good thermal conductivity, and impact resistance. On the one hand, silicon carbide can be used for various smelting furnace linings, high-temperature furnace components, silicon carbide plates, linings, supports, saggers, silicon carbide crucibles, etc.
On the other hand, it can be used for high-temperature indirect heating materials in non-ferrous metal smelting industry, such as vertical tank distillation furnaces, distillation furnace trays, aluminum electrolytic cells, copper melting furnace linings, arc plates for zinc powder furnaces, thermocouple protection tubes, etc.; used to make advanced silicon carbide ceramic materials such as wear-resistant, corrosion-resistant, and high-temperature resistant; it can also be used to 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 aviation runways.
Nonferrous metals
Silicon carbide is used as a high-temperature indirect heating material due to its high temperature resistance, high strength, good thermal conductivity and impact resistance, such as hard pot distillation furnaces, distillation furnace trays, aluminum electrolytic cells, copper melting furnace linings, arc plates for zinc powder furnaces, thermocouple protection tubes, etc.
Steel
Silicon carbide is used for linings of large blast furnaces to increase its service life due to its corrosion resistance, thermal shock resistance, wear resistance and good thermal conductivity.
Metallurgical ore dressing
Silicon carbide is second only to diamond in hardness and has strong wear resistance. It is an ideal material for wear-resistant pipes, impellers, pump chambers, cyclones and hopper linings. Its wear resistance is 5-20 times that of cast iron and rubber. It is also one of the ideal materials for aviation runways.
Building materials ceramic grinding wheel industry
Using its thermal conductivity, thermal radiation, and high thermal strength, the thin plate kiln furniture can not only reduce the capacity of the kiln furniture, but also improve the kiln capacity and product quality, shorten the production cycle, and is an ideal indirect material for ceramic glaze baking and sintering.
Energy saving
Using good thermal conductivity and thermal stability, as a heat exchanger, fuel consumption is reduced by 20%, fuel is saved by 35%, and productivity is increased by 20-30%, especially for the discharge and conveying pipelines used in mine dressing plants. Its wear resistance is 6-7 times that of ordinary wear-resistant materials.
Abrasive particle size and composition are in accordance with GB/T2477–83. The determination method of abrasive particle size composition is in accordance with GB/T2481–83.