New areas of silicon carbide applications

Silicon carbide is an inorganic substance with a chemical formula of SiC. It is made by smelting raw materials such as quartz sand, petroleum coke (or coal coke), and wood chips (salt is needed to produce green silicon carbide) through a resistance furnace at high temperature. Silicon carbide also exists in nature, a rare mineral, moissanite. Among the non-oxide high-tech refractory materials such as C, N, and B, silicon carbide is the most widely used and most economical one, which can be called gold steel grit or refractory grit. The silicon carbide produced in China’s industry is divided into black silicon carbide and green silicon carbide, both of which are hexagonal crystals, with a specific gravity of 3.20 to 3.25, and a microhardness of 2840 to 3320kg/mm2.
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.
⑴ As an abrasive, it can be used to make abrasive 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 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.
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 Pattern plate, thermocouple protection tube, etc.
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 pipes, impellers, pump chambers, cyclones, and hopper linings. Its wear resistance is 5 times the service life of cast iron and rubber. -20 times 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, and shorten the production cycle. It is 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.
Synthetic Moissanite, also known as synthetic moissanite, synthetic moissanite (chemical composition SiC), has a dispersion of 0.104, which is larger than diamond (0.044), a refractive index of 2.65-2.69 (diamond 2.42), and the same diamond luster , “Fire Color” is stronger, closer to diamonds than any imitations in the past.
Sandblasting and rust removal:
This product is made of brown corundum powder through high-strength pressure extrusion, high-temperature sintering and molding, moderate hardness, clean and clean, not easy to break. Repeated use, sandblasting effect is good.
1. The surface of steel, steel pipe, steel structure stainless steel products is matt treatment, sandblasting and rust removal treatment before spraying.
2. Used for cleaning 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 intensified 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.
Jiangxi Sanxin New Meterials Co., Ltd. is a Sino-US joint venture high tech enterprise founded in 2008. It’s one of integration of industry and trade.

silicon carbide bead

The company develop and produce structure ceramics, electronic ceramics, chemical ceramics, environmental ceramics and so on whose applications include grinding, surface treatment, petrochemical, water treatment, refractory, electronic material, military and other fields. In 2010 and 2011, we were awarded the prestigious “Top 100 China Jiangxi Highest Investment Value in Science and Technology Enterprises for 1st half of 2010” and “High Technology Private Enterprise in Jiangxi Province”. The company has been certified ISO9001: 2008 quality management system certification in 2012, as well. Moreover, we have several patents and possess several other intellectual properties and trade secrets.

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Post time: Jun-02-2021
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