PRODUCT INTRODUCTION

Silicon carbide, an inorganic substance with the chemical formula SiC, is smelted at high temperatures in resistance furnaces using raw materials such as quartz sand, petroleum coke (or coal coke), and wood chips (table salt is added to produce green silicon carbide). Silicon carbide is a semiconductor that exists in nature in the form of the extremely rare mineral moissanite. It has been mass-produced as powder and crystals since 1893, and is used as an abrasive and so on. Among the non-oxide high-tech refractory raw materials such as C, N and B, silicon carbide is one of the most widely and economically used, and can be referred to as golden steel sand or refractory sand. China's industrial production of silicon carbide is divided into two kinds of black silicon carbide and green silicon carbide, are hexagonal crystals.

APPLICATION AREAS

Silicon carbide has four main applications, namely: functional ceramics, advanced refractories, abrasives and metallurgical raw materials. Crude silicon carbide can be supplied in large quantities and cannot be considered as a high-tech product, while the application of nanoscale silicon carbide powder, which is of extremely high technical content, is unlikely to form an economy of scale in a short period of time.

(1) As an abrasive material, it can be used to make abrasive tools, such as grinding wheels, oil stones, grinding heads, sanding tiles and so on.

(2) As metallurgical deoxidizer and high temperature resistant material.

(3) High purity single crystal, can be used in the manufacture of semiconductors, the manufacture of silicon carbide fiber.

MAIN USES

for 3-12 inch monocrystalline silicon, polycrystalline silicon, potassium arsenide, quartz crystals and other wire cutting. Solar photovoltaic industry, semiconductor industry, piezoelectric crystal industry engineering processing materials.

Used in semiconductors, lightning rods, circuit elements, high-temperature applications, ultraviolet detectors, structural materials, astronomy, disc brakes, clutches, diesel particulate filters, fine filament pyrometers, ceramic films, cutting tools, heating elements, nuclear fuel, jewelry, steel, protective gear, catalyst carriers and other fields.

Abrasives

Mainly used in the production of grinding wheels, sandpaper, abrasive belts, oil stone, grinding block, grinding head, grinding paste and photovoltaic products in the monocrystalline silicon, polycrystalline silicon and the electronics industry piezoelectric crystals, such as grinding, polishing and so on.

Chemical industry

It can be used as the deoxidizer for steel making and the improver of cast iron organization, and can be used as the raw material for manufacturing silicon tetrachloride, which is the main raw material of silicone resin industry. Silicon carbide deoxidizer is a new type of strong composite deoxidizer, replacing the traditional silicon powder carbon powder for deoxidation, and the original process compared to the physical and chemical properties are more stable, deoxidation effect is good, so that the deoxidizing time is shortened, saving energy, improve the efficiency of steelmaking, improve the quality of steel, reduce the consumption of raw and auxiliary materials and materials, reduce environmental pollution, improve the labor conditions, and improve the comprehensive economic efficiency of the electric furnace are of great value.

"Three resistant materials

The use of silicon carbide has corrosion resistance, high temperature resistance, high strength, good thermal conductivity, impact resistance and other characteristics, silicon carbide can be used for a variety of smelting furnace lining on the one hand, high temperature furnace and kiln components, silicon carbide plate, lining, support, sagger, silicon carbide crucible and so on.

On the other hand, it can be used for high-temperature indirect heating materials for non-ferrous metal smelting industry, such as vertical distillation furnace, distillation furnace tower plate, aluminum electrolysis tank, copper melting furnace lining, zinc powder furnace with arc-type plate, thermocouple protection tubes, etc.; for the production of abrasion-resistant, corrosion-resistant, heat-resistant and other high-level silicon-carbide ceramic materials; it can also be made into a rocket nozzle, gas turbine blades, etc.. In addition, silicon carbide is also one of the ideal materials for highways, airplanes, runways, solar water heaters and so on.

Thermal conductivity

The thermal conductivity of SiC materials, like most dielectric solids, is mainly affected by the transmission of thermoelastic waves (called phonons).The thermal conductivity of SiC materials depends mainly on: 1) the number, stoichiometric ratio, and chemical properties of sintering aids, as well as the associated grain boundary thickness and degree of crystallinity; 2) the size of the grains; 3) the type and concentration of impurity atoms in the SiC crystals; 4) the sintering atmosphere; and 5) the post-sintering heat treatment, etc. SiC has a high thermal conductivity. SiC has excellent properties such as high thermal conductivity, large forbidden band width, high electron saturation migration rate and high critical breakdown field, and its excellent comprehensive performance makes up for the shortcomings of traditional semiconductor materials and devices in practical applications, and it has a wide range of prospects for application in electric vehicles, cell phone communication chips and other fields. As SiC has a higher reliability, higher operating temperature, smaller size and higher voltage tolerance, etc., can be applied to the main drive board, vehicle chargers and power modules and other power devices, which can greatly improve the efficiency of electric vehicles to increase range. At the same time, SiC has good thermal conductivity, the use of SiC semiconductor power devices can reduce the size of the battery as well as more efficient conversion of energy, thereby reducing the cost of the assembly device. SiC ceramics as a high-performance structural ceramic materials, with excellent thermal properties, can be widely used in high temperature resistance, heating and heat exchange industry.

Steel

Utilizing the characteristics of silicon carbide, such as corrosion resistance, resistance to thermal shock and abrasion, and good thermal conductivity, it is used in the lining of large-scale blast furnaces to improve service life.

Metallurgy and Mineral Processing

Silicon carbide hardness is second only to diamond, with strong wear resistance, is wear-resistant pipes, impellers, pump chambers, cyclones, mine bucket lining of the ideal material, its wear resistance is cast iron, rubber service life of 5-20 times is also one of the ideal materials for aviation flight runway.

Energy saving

Utilizing the good thermal conductivity and thermal stability, as a heat exchanger, the combustion consumption is reduced by 20%, saving 35% of fuel, so that the productivity increased by 20-30%.

Abrasive particle size and its composition according to GB/T2477--83. Abrasive particle size composition determination method according to GB/T2481--83.

Jewelry

Synthetic Silicon Carbide (Synthetic Moissanite), also known as synthetic moissanite, synthetic carbon silica (chemical composition SiC), dispersion 0.104, larger than diamonds (0.044), refractive index of 2.65-2.69 (diamonds 2.42), has the same diamond luster with diamonds, "Fire Color " is stronger and closer to diamond than any previous imitations.