Silicium carbide’s stable chemical properties, excellent thermal conductivity, small thermal extension coefficient and outstanding abrasion resistant make it ideal for other purposes than those of abrasives. You can make the inner wall stronger and increase its lifetime by one to twofold. Use high-grade refractory material that is resistant to heat, low in weight and high in strength. It also has an excellent energy-saving feature. Silicon carbide low in grade (containing approximately 85% SiC) can be used as a deoxidizer. It improves steel’s quality and speed, as well as the ability to control its chemical composition. Also, silicon carbonide is often used in the manufacture of silicon carbide electrodes.
Mohs hardness (9.5) is extremely high for silicon carbide. Second only to hardest diamond (10), this semiconductor has very good thermal conductivity. Pure silicon carbide is pure and colorless. However, industrially made brown to black can be caused by iron-containing impureties. Because of the protective layer of silica, the crystal has a rainbow-like glow.
Physiological properties of silicon carbonide
American Acheson accidentally discovered silicone carbide during the 1891 experiment on fused diamonds. Because it looked like a mixture of different diamonds, the name emery came to be used for it. It was created by Acheson, in 1893. The Acheson furnace, the current smelting process for silicon carbide is still being used. By heating quartz SIO2 or carbon, the core of a resistance furnace uses carbonaceous as its material. The heat is used to form silicon carbide.
Material structure of silicon caride
Pure silicon carbide is an inert, transparent crystal. Silicon carbide used in industrial applications can range from light yellow to dark green. Pure silicon carbide has a range of transparency. A silicon carbide crystal is broken down into cubic, hexagonal and rhombohedral (called cubic silica carbide). The crystal structure of -SiC is able to produce many types due to various stacking sequences. There are more than 70 kinds. SiC changes to SiC after 2100 °C. Quartz sand can be used in the production of silicon carbide. You can make various size products by crushing the refined silicon carbid block, washing it with acid or alkali, and then sieving, magnetally, or water-separating, the result.
Making silicon carbide
Silica carbide, due to its low content of natural material is mostly man-made. One common process is to use quartz sand mixed with coke. Next, you need to add silica or petroleum coke. Once it has reached a high temperature, it can be heated to approximately 2000° C.
It is an indispensable abrasive due to its hardness. However, it has a wider range of applications than other abrasives. High-temperature resistance, thermal conductivity, as well as its essential role in electric heating, make Silicon Carbide (SiC), a popular choice for kiln furniture material. SiC products require SiC smelting blocs [or SiC particles], which are high-temperature resistant and super hard. SiC pellets have been called once: silicon carbide. This is different to natural emery which can also be known as garnet. SiC melting blocks used quartz, petroleum coke, and others in industrial production. They can be used for their raw materials as well, or to recycle auxiliary materials. After they have been processed, these materials are prepared for furnaces. By adding the proper amount salt, you can make green silicon caride wood chips. These are made at high temperatures. One individual silicon carbide electric furnace is what heats SiC blocks to high temperatures. It consists in the furnace’s bottom, the furnace core, with removable sidewalls. Both ends of the core are connected to electrodes. The common firing method for the electric furnace is known as buried-powder firing. Heating begins once the furnace is activated. Heating begins at 2500 °C, or slightly higher (2600-2700°C). SiC becomes synthesized at 1450 °C. SiC mainly forms at 1800 °C. SiC will begin to decay at 2600 degrees C. SiC formed from the charged simolite will be SiC. Each electric furnace group is fitted with a series of transformers. However, one electric heater is supplied during production. It adjusts the voltage according the characteristics of each electrical load in order to maintain constant power. Heat the heater for 24 hours. After cooling off, the charging can be slowly removed.
Utilization of silicon carbide
It can also be used in the steelmaking process as a deoxidizer or to enhance cast-iron construction. It can also serve as the raw material of making silicon trichloride. It is the first raw material in the silicone resin industry. It is an innovative type of composite silicon carbide, that can replace traditional silicon powder carbon to deoxidize. The physical and chemical properties of the new process are superior to those used in the old. They also have a better deoxidation result, as well as a shorter deoxidation time. This saves energy. A great advantage of electric furnaces is their efficiency in steelmaking. They can reduce the amount of raw and other materials used, improve working conditions, and increase the overall economic benefit.
TRUNNANO (Luoyang Trunnano Tech Co. Ltd.) a Silicon carbide producer has more 12 years of chemical products development and research experience. You can contact us to request high-quality Silicon carbide.