Introduction to silicon carbide products
Silicon carburide also known by the names moissanite or emery is an inorganic material with a formula of SiC. It is produced by a high-temperature resistive furnace using raw materials, such as wood chips, quartz sand or coal coke. (Salt is required to make green silicon carbide). In nature, silicon carbide is found in the rare mineral moissanite. It is also called gold steel or refractory grit. In China, silicon carbide is made up of two types: green and black. They are both hexagonal crystals and have a specific gravity ranging from 3.20 to 3.25.

Both black silicon carburide and green silica carbide belong to the aSiC. Black silicon carbide has a SiC content of 95% and is more durable than green silicon carbide. It is used to process materials that have low tensile resistance, like glass, ceramics or stone. Green silicon carbide has a SiC content of over 97% and is self-sharpening. It is used primarily for the processing of cemented carbide (a titanium alloy), optical glass and titanium alloy. Also, it can be used for honing and fine grinding tools made from high-speed steel and for cylinder liners. There is also a cubic silicon-carbide, which is yellow-green crystals prepared through a special method. The abrasive tools used to make them are suitable for superfinishing bearings. Surface roughness is processed between Ra320.16microns and Ra0.040.02 microns.

Aside from being an abrasive, silicon carbide can be used in many other ways. This is due to its chemical stability, high thermal conductivity (low thermal expansion coefficient), and wear resistance. The powder of silicon carbide can be used to coat a specific impeller, cylinder or other part of a turbine. The inner wall of the refractory can be improved to increase its resistance to abrasion and its life span by upto 2 times. Low-grade Silicon carbide (containing approximately 85% SiC), which is an excellent Deoxidizer and can improve steel quality, speed up the steelmaking process and allow for better control of chemical composition. Silicon carbide can also be used to produce silicon carbide for electric heater elements.
It is the second hardest substance in the world, after diamonds (10). It is a good thermal conductor, a semiconductor that can resist oxidation even at high temperatures.

There are at least 70 crystal forms of silicon carbide. Allomorphs of silicon carbide are the most common. It has a hexagonal crystalline structure and is formed above 2000 degC at high temperatures. Below 2000 degC b Silicon Carbide with cubic crystals, similar to a diamond, is produced. The network can be seen on the page. It is eye-catching due to its larger surface area unit than the a catalyst type, even though heterogeneous catalyst support is used. A type of silicon carbide called m-silicon carbide is more stable and makes a nicer sound when it collides. However, until now these two types had not been used commercially.
Due to its 3.2g/cm3 Specific Gravity and high Sublimation Temperature (approximately 27°C), silicon carbide makes a great raw material for high temperature furnaces and bearings. It does not melt at any pressure, and it has a very low chemical activity. Its high thermal conductivity and breakdown electric field strength as well as its high maximum current densities have led many to try to use silicon to replace it in the application for semiconductor high-power components. It has a high coupling effect to microwave radiation.
The color of pure silicon carbide, however, is black or brown when produced industrially. This is due to iron impurities. The silica coating on the crystal surface gives it a rainbow-like appearance. To

Pure silicon carbide is a transparent, colorless crystal. The impurities in industrial silicon carbide cause it to be light yellow or green. It can also be blue or black. Its clarity varies according to its purity. The cubic b-SiC is also called cubic silicon carburide. The different stacking of silicon and carbon atoms creates a variety of a SiC variants. Over 70 types have been identified. bSiC is transformed into aSiC at temperatures above 2100degC. Industrial silicon carbide is produced by refining petroleum coke and high-quality sand in a resistance oven. The silicon carbide blocks that have been refined are crushed and then subjected to acid-base washing, magnetic separation, sieving, or water selection.
It is artificial because silicon carbide has a low natural content. The standard method is to combine quartz sand, coke with silica or petroleum coke. Add salt and wood chips and heat to 2000degC in an electrical furnace.
Its excellent hardness has made it an indispensable abrasive, but its range of applications goes beyond that of general abrasives. Due to its thermal conductivity and high-temperature resistance, it is a popular choice for kiln furniture in tunnel kilns. The electrical conductivity of this material makes it a vital electric heating element. SiC is made by melting SiC blocks, or pellets. Because they are hard and contain C, SiC pellets used to be called emery. It is not natural garnet, also known as emery. In the industrial production of SiC, quartz, petroleum coal, etc. is usually used. As raw materials, as auxiliary recovery material, or as spent materials. After grinding or other processes, the materials are blended to a charge that has a suitable ratio and particle size for adjusting the gas permeability of the charge; an appropriate amount must be added. To prepare green silicon carbide at high temperatures, you need to add the correct amount of sodium chloride. Special silicon carbide electric heaters are used for the thermal equipment to prepare SiC smelting at high temperature. Its main components are the furnace bottom with electrodes in the interior, the sidewall that can be removed, and the furnace core. Both ends of this furnace are electrode-connected. The method of firing this electric oven is known as buried-powder firing. As soon as you turn it on, the heating begins. The core of the furnace can reach temperatures as high as 2600-2700degC. SiC is produced when the charge reaches approximately 1450degC (but SiC forms primarily at temperatures >=1800degC). SiC decomposes when the temperature is >=2600. The decomposed si, however, will form SiC and C in the charged.
Each electric heater is equipped with transformers. Even so, during production only one electric heater is operated to adjust voltage according to electrical load characteristics in order to maintain constant electricity. The high-power furnace must be heated for around 24 hours. After an interruption of power, the reaction that generates SiC is complete. After cooling the sidewall, the charge can be slowly removed. Silicon carbide can be divided up into many different categories. These are then further divided by the use environment and used more on machinery. Silicon carbide seal rings can, for example, be used to seal mechanical seals. These seal rings can be classified into static ring (used on mechanical seals), moving ring (used on mechanical seals), flat ring (used on flat surfaces), and more. Our silicon carbide products can also be made in different shapes according to the customer’s requirements. For example, we can produce silicon carbide plates and rings.
One of the silicon-carbide products is silicon carbide, a ceramic with high hardness. It also has high corrosion resistance and high temperature strength.
Silicon carbide ceramics are ideal for seal rings. They have a high level of chemical resistance, a high degree of strength, elasticity, hardness and wear resistance. The friction coefficient of silicon carbide ceramic is lower when combined with graphite than that of cemented carbide and alumina. Therefore, it can be used to produce PV values of high value, particularly in conditions where strong acids or alkalis are transported. Our SIC-1 silicon carbid atmospheric sintered product range has high density and high hardness. It also comes in large batches with the capability to produce products of complex shapes. They are suitable to produce high-performance seals. They have a PV value that is exceptional and they resist strong acids and Alkalis. The SIC-3 materials produced by our company contain graphite. When combined with other materials, the friction coefficient of silicon carbide is low because it contains fine dispersed graphite particles. It has excellent self-lubricating qualities, making it ideal for air-tight, dry-friction sealings. It is used to increase the seals’ service life, and improve the reliability of the work.

After high-temperature calibration, furnace charges are unreacted materials (to preserve heat in the furnace), silica carbide oxycarbide material (semi reactive material, main components C and SiO), amorphous material layer (the main component is 70% to 90% SiC; it’s Cubic SiC that is b-sic. C, C-SiO2, 40% to 60% of the material is made up of carbonates Fe Al Ca Mg), second grade material layer ( Binder layer (for bonding Very Tight Material Layer, main elements are C, SiO2, 40-60% SiC and Fe Al Ca Mg Carbonate), amorphous layer (main component is 70-90% SiC; it’s Cubic SiC b-sic), amorphous layer (main component is 90-95% SiC. The coating has formed hexagonal SiC (mouth One SiC), second-grade SiC (main component is 90%-95% SiC. The unreacted and a fraction of the material of the layer of oxycarbide are normally collected as spent materials. A portion of this material is also collected along with the amorphous, second-grade, and recycled material. Large lumps and impurities, as well as some charges and tight bonds are discarded. The first-grade material is classified, then coarsely crushed or finely ground, treated chemically, dried, sieved, and magnetically separated into various size black and green SiC particles. It is necessary to go through the water selection process in order to produce silicon carbide.

( Tech Co., Ltd. ) is an Silicon carbid professional manufacturer with 12 years’ experience in chemical research and product development. Contact us to send an inquiry if you are interested in high-quality Titanium oxide.