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Application overview of nano silicon carbide

wallpapers Industry 2020-10-23
Silicon carbide nanomaterials not only have the characteristics of high thermal conductivity, strong thermal stability, oxidation resistance, chemical corrosion resistance, low thermal expansion coefficient, high thermal conductivity, good chemical stability, and high mechanical properties, but also a high band gap, small Dielectric constant and high electron saturation mobility, high critical breakdown electric field and thermal conductivity and many other excellent characteristics. Electronic and optoelectronic devices made of SiC single crystal have broad application prospects in special environments such as aerospace, radar communications, automobiles and oil drilling, and high-temperature radiation environments. At the same time, its other unique optical, electrical, and excellent mechanical properties have extremely wide and potential application values ​​in many fields.
1 Mechanical properties of nano silicon carbide and its application in composite materials

Silicon carbide whiskers have high strength, hardness and elastic modulus, light weight, heat resistance, corrosion resistance, stable chemical properties and other excellent characteristics. It has been widely used in many fields such as automobiles and ships, aerospace, chemical and chemical industries. Good applications are also known as the "King of Whiskers". So far, scientists have been able to measure and calculate the mechanical properties of a single whisker in the microscopic field. Studies have shown that the tensile and bending strength of linear silicon carbide is much better than that of bulk silicon carbide ceramics. Therefore, carbide Silicon nanowires can be used as composite material reinforcements with better performance, and have good results in reinforcing high molecular polymers, ceramics and metal materials, and have broad application prospects.

In aerospace, the propellers of helicopters and the turbine blades of jet aircraft can be better dealt with air resistance after adding reinforcements; silicon carbide and metal aluminum composite materials have high strength, toughness and heat resistance And fatigue resistance, applied to the mechanical parts and parts of automobiles, trains and sports equipment; silicon carbide applied to ceramic composite materials can significantly improve the original brittleness of ceramics, and also improve its high temperature heat resistance , Can be used as high-temperature corrosion-resistant chemical reaction kettle materials, etc., can also be used in military and astronomical sciences to absorb radar waves, and can be used as stealth structural materials for rockets, missiles, airplanes, etc.

2 Nano silicon carbide and catalyst carrier

The high specific surface area has always been one of the important properties of the catalyst carrier to be investigated. Due to the excellent performance of the material itself, the high specific surface area silicon carbide has better performance than other carriers when used as a catalyst carrier. Compared with traditional carrier alumina, silicon oxide, etc., the superiority of SiC material is mainly reflected in the following aspects: 1) high thermal conductivity, strong heat resistance; 2) high chemical stability; 3) high mechanical strength , Not easy to break; 4) low thermal expansion rate.
3 Field emission properties of nanometer silicon carbide

The SiC nanowire array has low turn-on voltage and threshold voltage, high current density, stable field emission performance, and is an ideal field emission cathode material. At the same time, its stable chemical properties, high temperature and high pressure resistance, and corrosion resistance make it widely used in the field of microelectronic devices.
4 Photoelectric properties of nano-silicon carbide

Silicon carbide is also one of the luminescent materials discovered earlier. In a low temperature environment, silicon carbide can emit blue light. People make use of the wide band gap characteristics of silicon carbide to make blue-like light-emitting diodes. Due to its indirect band gap characteristics, its blue light intensity is very weak and its stability is also very poor, making the luminous efficiency of silicon carbide extremely low, thus limiting its application range. In order to improve the luminous efficiency of silicon carbide, many improvements have been devised, including the preparation of amorphous silicon carbide, porous single crystal silicon carbide and porous silicon carbide.

Trunnano is one of the world's largest producers of nano silicon carbide powder. If you have any questions or needs, please contact Dr. Leo by email: brad@ihpa.net.

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