Uses of silicon carbide

Silicon carbide has four main application areas, namely: functional ceramics, advanced refractories, abrasives and metallurgical raw materials. Coarse silicon carbide materials can already be supplied in large quantities and cannot be regarded as a high-tech product. The application of nano-scale silicon carbide powder with extremely high technical content is unlikely to form economies of scale in a short time.

⑴As an abrasive, it can be used to make abrasive tools, such as grinding wheels, oilstones, grinding heads, sand tiles, etc.

⑵As a metallurgical deoxidizer and high temperature resistant material.

⑶ High-purity single crystals can be used to manufacture semiconductors and silicon carbide fibers.

Main application: used for wire cutting of 3-12 inch monocrystalline silicon, polycrystalline silicon, potassium arsenide, quartz crystal, 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, UV 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 carrier and other fields.

Abrasives

Mainly used for making grinding wheels, sandpaper, belts, whetstones, grinding blocks, grinding heads, grinding pastes, and grinding and polishing of monocrystalline silicon, polycrystalline silicon and piezoelectric crystals in the electronics industry in photovoltaic products.

Chemical industry

It can be used as a deoxidizer for steelmaking and an improver for cast iron structure, 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, various physical and chemical properties are more stable, and the deoxidation effect is good. It shortens the deoxidation time, saves energy and improves Steelmaking efficiency, improvement of steel quality, reduction of consumption of raw and auxiliary materials, reduction of environmental pollution, improvement of working conditions, and improvement of the overall economic benefits of electric furnaces are all of great value.

"Three-resistant" material

Using 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 in various smelting furnace linings, high temperature furnace components, silicon carbide plates, lining plates, supports, and saggers. , Silicon carbide crucible, etc.

On the other hand, it can be used for high-temperature indirect heating materials in the non-ferrous metal smelting industry, such as vertical distillation furnaces, rectification furnace trays, aluminum electrolytic cells, copper melting furnace linings, arc plates for zinc powder furnaces, thermocouple protection tubes, etc. ; Used to make high-grade silicon carbide ceramic materials such as wear resistance, corrosion resistance and high temperature resistance; 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.

Non-ferrous metals

The use of silicon carbide has high temperature resistance, high strength, good thermal conductivity, and impact resistance. It is used as high-temperature indirect heating material, such as solid pot distillation furnace, rectification furnace tray, aluminum electrolytic tank, copper melting furnace lining, and arc for zinc powder furnace Profiles, thermocouple protection tubes, etc.

Steel

Using silicon carbide's corrosion resistance, thermal shock resistance, wear resistance, and good thermal conductivity, it is used in large blast furnace linings to increase the service life.

Metallurgical beneficiation

The hardness of silicon carbide is second only to diamond, and it has strong wear resistance. It is an ideal material for wear-resistant pipelines, impellers, pump chambers, cyclones, and hopper linings. Its wear resistance is 5 times the service life of cast iron and rubber. --20 times & def is also one of the ideal materials for aviation flight runways.

Building Material Ceramic Grinding Wheel Industry

The use of its thermal conductivity, thermal radiation, high thermal strength, and the manufacture of thin-plate kiln furniture can not only reduce the capacity of the kiln furniture, but also increase the capacity and product quality of the kiln, shorten the production cycle, and are ceramic glazed baking and sintering. Ideal indirect material.

Energy saving

Using good heat conduction and thermal stability as a heat exchanger, the fuel consumption can be reduced by 20%, the fuel can be saved by 35%, and the productivity can be increased by 20-30%, especially in the discharge pipeline used in the mine concentrator, the degree of wear resistance It is 6-7 times that of ordinary wear-resistant materials.

The particle size and composition of the abrasive are in accordance with GB/T2477-83. The determination method of abrasive particle size composition is in accordance with GB/T2481-83.

Jewelry

Synthetic Moissanite, also known as synthetic moissanite, synthetic moissanite (chemical composition SiC), has a dispersion of 0.104 larger than that of diamond (0.044), a refractive index of 2.65-2.69 (diamond 2.42), and has the same diamond luster as diamond. "Fire" is stronger and closer to diamonds than any imitations in the past. This is manufactured by the C3 company in North Carolina, USA. It has patents for the production of synthetic silicon carbide from all over the world, and it is being promoted and applied all over the world.

Sandblasting and rust removal: Okay Sandblasting Abrasive Company, 　Okay dust-free emery product use:

This product is made of brown corundum powder that is extruded by high-strength pressure. High-temperature sintering. The hardness is moderate. It is clean and not easy to break. It can be used repeatedly. The sandblasting effect is good. 1. The surface of steel, steel pipe and steel structure stainless steel products is substandard. Light treatment. Sandblasting and rust removal before spraying.

2. Used for the cleaning of various molds

3. It can remove the tensile stress of various mechanical parts and increase the fatigue life

4. Cleaning and removing edge thorns before tinning on semiconductor devices and plastic encapsulation tubes

5. Shot peening and finishing of medical equipment, textile machinery and various hardware products

6. Cleaning and removing burr residues of various metal pipes and non-ferrous metal precision castings

Product characteristics of high-aluminum shot peening (corundum ball):

1. Both soft and hard—made of high-quality materials, that is, it has a certain mechanical strength, the content of AL2O3 is greater than or equal to 68%, the hardness can reach 6-7 Mohs, and it has enough flexibility, can be used repeatedly for several times, and is not easy to break , The sprayed device has the same effect, and the service life is more than 3 times longer than 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 the sandblasting device is kept uniform, and it is not easy to leave watermarks. Okay Abrasives.