1, scope of application
Silicon carbide has four main application fields, namely: functional ceramics, advanced refractories, abrasives and metallurgical raw materials. Crude silicon carbide can be supplied in large quantities, which is not a high-tech product, and the application of nano silicon carbide powder with high technical content cannot form economies of scale in a short time.
(1) as abrasive, can be used as abrasive tools, such as grinding wheel, whetstone, grinding head, sand tile, etc.
⑵ Used as metallurgical deoxidizer and high temperature resistant material.
(3) High-purity single crystals can be used to manufacture semiconductors and silicon carbide fibers.
Main uses: used for wire cutting of 3- 12 inch monocrystalline silicon, polycrystalline silicon, potassium arsenide, timely crystal, etc. Engineering processing materials for solar photovoltaic industry, semiconductor industry and piezoelectric crystal industry.
It is used in the fields of semiconductors, lightning rods, circuit components, high-temperature applications, ultraviolet detectors, structural materials, astronomy, disc brakes, clutches, diesel particulate filters, filament pyrometers, ceramic membranes, cutting tools, heating elements, nuclear fuel, jewelry, steel, protective gear, catalyst carriers and so on.
2. Abrasive abrasives
Mainly used for grinding and polishing grinding wheels, sandpaper, abrasive belts, oilstones, grinding blocks, grinding heads, grinding pastes, monocrystalline silicon, polycrystalline silicon and piezoelectric crystals in the electronic industry.
3. Chemical industry
It can be used as deoxidizer for steelmaking and improver for cast iron structure, and also can be used as raw material for manufacturing silicon tetrachloride, which is the main raw material of silicone resin industry. Silicon carbide deoxidizer is a new powerful compound deoxidizer, which replaces the traditional silicon powder carbon powder for deoxidization. Compared with the original process, the physical and chemical properties are more stable, the deoxidation effect is good, the deoxidation time is shortened, the energy is saved, the steelmaking efficiency is improved, the steel quality is improved, the consumption of raw and auxiliary materials is reduced, the environmental pollution is reduced, the working conditions are improved, and the comprehensive economic benefits of the electric furnace are improved.
4. "Three-proof" 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 parts, silicon carbide plates, linings, supports, saggers, silicon carbide crucibles and the like.
On the other hand, it can be used for high-temperature indirect heating materials in nonferrous metal smelting industry, such as vertical tank distillation furnace, distillation furnace tray, aluminum electrolytic cell, copper smelting furnace lining, arc plate for zinc powder furnace, thermocouple protection tube and so on. Used for manufacturing advanced silicon carbide ceramic materials with wear resistance, corrosion resistance and high temperature resistance; It can also be used to make rocket nozzles and gas turbine blades. In addition, silicon carbide is also one of the ideal materials for solar water heaters on expressways and airstrips.
5, non-ferrous metals
Silicon carbide has high temperature resistance, high strength, good thermal conductivity and impact resistance, and can be used as high-temperature indirect heating materials, such as retort, retort tray, aluminum electrolytic cell, copper melting furnace lining, arc plate for zinc powder furnace, thermocouple protection tube, etc.
6. Steel
Using the characteristics of silicon carbide, such as corrosion resistance, thermal shock resistance, wear resistance and good thermal conductivity, it is used in the lining of large blast furnace to improve its service life.
7. Metallurgical beneficiation
The hardness of silicon carbide is second only to that of diamond, and its wear resistance is strong. It is an ideal material for wear-resistant pipes, impellers, combustion chambers, cyclones and hoppers, and its wear resistance is 5-20 times that of cast iron and rubber. Def is also one of the ideal materials for aviation flight runway.
8. Building materials ceramic grinding wheel industry
Using its characteristics of high thermal conductivity, heat radiation and high heat intensity, manufacturing thin-plate kiln furniture can not only reduce the volume of kiln furniture, but also improve the loading capacity and product quality of kiln and shorten the production cycle. It is an ideal indirect raw material for firing and sintering ceramic glaze.
9, energy saving
Using good thermal conductivity and thermal stability as a heat exchanger can reduce fuel consumption by 20%, save fuel by 35% and improve productivity by 20-30%, especially for the internal placement of discharge pipes in mine concentrator, and its wear resistance is 6-7 times that of ordinary wear-resistant materials.
Abrasive particle size and its composition conform to GB/T 2477-83. The determination method of abrasive particle size composition is GB/T 248 1-83.
10, jewelry
Synthetic silicon carbide, also known as synthetic Mosanite and synthetic moissanite (chemical composition SiC), has a dispersion of 0. 104 greater than that of diamond (0.044) and a refractive index of 2.65-2.69 (2.42 of that of diamond), which has the same diamond luster and stronger "fire color" and is closer to diamond than any previous imitation. This is made by C3 Company in North Carolina, USA. It has patents for the production and synthesis of silicon carbide in all countries of the world and is being popularized and applied all over the world.
Sand blasting derusting:
This product is made of micro-powder of brown corundum by high-strength pressure extrusion and high-temperature sintering. It has moderate hardness, cleanness, and is not easy to break, and the sandblasting effect is good after repeated use.
1. The surfaces of stainless steel products of steel, steel pipes and steel structures shall be matte polished and sandblasted and derusted before spraying.
2. Used for cleaning various molds.
3. It can eliminate the tensile stress of each part and increase the fatigue life.
4. Before the plastic packaging of semiconductor devices, clean the inside of the tube to remove edge burrs.
5, medical equipment, textile machinery and all kinds of hardware products shot peening to strengthen light decoration processing.
6, all kinds of metal pipes, nonferrous metal precision castings cleaning and burr residue removal.
Product characteristics of high alumina shot peening (corundum ball);
1, both soft and hard are made of high-quality materials, that is, it has certain mechanical strength, AL2O3 content is greater than or equal to 68%, hardness can reach 6-7 Mohs, and it is elastic enough to be used for many times and is not easy to break. The spraying device has the same effect, and its service life is more than 3 times that of ordinary emery.
2. Good uniformity-the rounding rate is greater than or equal to 80%, and the particle size is uniform. After spraying, the brightness coefficient of sandblasting device is uniform everywhere, so it is not easy to leave watermark. Okay, abrasive.