Silicon carbide has stable chemical properties, high thermal conductivity, small thermal expansion coefficient, and good wear resistance. In addition to being used as an abrasive, silicon carbide has many other uses. For example, silicon carbide powder is coated on turbine impellers or cylinder blocks using special processes. The inner wall can improve its wear resistance and extend its service life by 1 to 2 times;
The advanced refractory material made of it is thermal shock resistant, small in size, light in weight, high in strength, and has good energy saving effect. Low-grade silicon carbide (containing about 85% SiC) is an excellent deoxidizer. It can speed up steelmaking, facilitate control of chemical composition, and improve the quality of steel. In addition, silicon carbide is also widely used in the production of silicon carbide rods for electric heating elements. Silicon carbide is very hard, with a Mohs hardness of 9.5, second only to the world's hardest diamond (level 10). It has excellent thermal conductivity, is a semiconductor, and can resist oxidation at high temperatures.
Black silicon carbide: It is made of quartz sand, petroleum coke and high-quality silica as the main raw materials, and is smelted through high-temperature resistance furnace. Its hardness is between corundum and diamond, its mechanical strength is higher than corundum, and it is brittle and sharp.
1. Power electronic devices:
Black silicon carbide is an important material for power electronic devices. Its high electron mobility and low resistivity can effectively improve the efficiency and power density of the device. Black silicon carbide power devices can be used in electric vehicles, solar panels, high-power LED light sources and other fields.
2. Module electronic components:
The high electrical and thermal conductivity and high thermal stability of black silicon carbide make it an ideal module electronic component, such as IGBT, MOSFET, SiC-SBD, etc. These components can be widely used in power electronics, communications, electronic equipment and other fields, and have the characteristics of high efficiency, high stability and long life.
3. Optoelectronic devices:
By utilizing the optoelectronic properties of black silicon carbide, such as its high heat resistance, high energy loss threshold and high radiation resistance, devices with special optoelectronic properties can be manufactured, such as LEDs, laser diodes, photodetectors, etc. These optoelectronic devices are widely used in military, aerospace, communications, medical and other fields.
4. Protective materials:
Black silicon carbide has the characteristics of high hardness, high temperature stability, high corrosion resistance and high wear resistance, making it an important protective material in aerospace, shipbuilding, automobile, chemical industry and other fields. Using these properties of black silicon carbide, high-strength composite materials, high-temperature wear-resistant coatings, high-pressure strengthened glass, etc. can be produced.
