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Introducing the properties and application areas of Silicon Carbide (SiC).

Date:2024-11-18

Silicon Carbide (SiC) has many excellent properties and has a wide range of applications in many fields, as follows:

  1. Performance Characteristics:
    • High hardness: Silicon carbide is one of the materials with very high hardness, second only to diamond, which makes it ideal for the manufacture of abrasives and cutting tools for machining hard materials, such as stone, ceramics and glass.
    • High Thermal Conductivity: Silicon carbide has a high thermal conductivity, which enables it to conduct and dissipate heat efficiently. This property makes it suitable for high-temperature environments and heat-sinking applications, such as in heat-sinking components of electronic equipment, where it can help to conduct heat quickly, lower the temperature of the equipment, and improve the stability and reliability of the equipment.
    • High chemical stability: At high temperatures, silicon carbide is highly resistant to most chemicals and is not susceptible to chemical reactions. This chemical stability allows it to maintain stable performance even in harsh chemical environments, and it can be used in the manufacture of chemical equipment, such as as raw materials for petroleum gasifiers and desulfurization furnace linings.
    • High-temperature strength: silicon carbide can maintain its mechanical strength at high temperatures, suitable for high-temperature structural materials, such as in iron and steel smelting can be used as a need to prevent corrosion, wear-resistant parts of the smelting equipment products, in the aerospace industry can be used as a rocket engine nozzle and high-temperature gas turbine blade raw materials .
    • Excellent semiconductor properties: Silicon carbide is a wide bandgap semiconductor with high electron mobility, high breakdown voltage and high thermal stability. This enables silicon carbide semiconductor devices to withstand higher temperatures, stronger electric fields and stronger radiation environments, and maintain good performance under extreme conditions such as high frequency, high voltage and high temperature.
    • Good abrasion resistance: Due to its high hardness, silicon carbide has excellent abrasion resistance and is suitable for manufacturing abrasion-resistant coatings and components, which can extend the service life of equipment.
    • Good biocompatibility: Silicon carbide has good biocompatibility and has potential applications in the medical field, for example in the manufacture of implantable medical devices such as artificial joints.
    • Unique optical properties: specific types of silicon carbide (e.g. β-sic) are transparent in the visible range and can be used for advanced optical components.
  2. Areas of Application:
    • Electronic Power Field :
      • Manufacture of power devices such as silicon carbide diodes and silicon carbide transistors. Compared with conventional silicon devices, silicon carbide power devices have the advantages of low on-resistance, high switching speed and high-temperature stability, which can significantly improve power conversion efficiency and reduce energy loss. In the main inverter, on-board charger, DC - DC converter and other components of electric vehicles, silicon carbide devices can improve the electric vehicle range, charging speed and overall performance; in the smart grid, it can be used in high-voltage DC transmission converter valves, flexible DC transmission converter valves, power electronic transformers and other equipment, which helps to improve the stability, reliability and efficiency of the power system.
    • Communications field: Silicon carbide's high electron mobility and good high-frequency characteristics make it an ideal material for manufacturing 5G base station power amplifiers and RF devices, helping to improve the transmission quality and coverage of communication signals1.
    • New energy field:
      • In solar photovoltaic power generation systems, silicon carbide inverters can improve the conversion efficiency of the system and reduce costs.
      • In wind power generation, silicon carbide devices can improve the performance and reliability of converters, enabling more efficient and stable operation of wind power systems.
    • Industrial Manufacturing Field :
      • Silicon carbide ceramics are widely used in mechanical seals, cutting tools, and wear-resistant parts due to their high hardness, high strength, and high temperature resistance. Compared with traditional materials, silicon carbide ceramics are able to maintain stable performance in harsh working environments and extend the service life of equipment.
      • In steel smelting, silicon carbide can be used as a deoxidizer to improve the purity of steel.
    • Aerospace: Silicon carbide's high-temperature resistance and ability to withstand high voltages make it a promising application in the high-temperature, high-voltage and high-frequency environments of aerospace electronic systems, for example, it can be used for controlling electric fans and barometric control systems, etc. 
    • Optical field: Utilizing its optical properties, it can be used to manufacture optical components such as optical windows, lenses, prisms, etc., as well as being used as a matrix material for laser crystals in laser technology.

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