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A Brief Discussion on Silicon Carbide
A Brief Discussion on Silicon Carbide
Silicon carbide, as a high-performance material, has attracted much attention in the semiconductor industry in recent years. However, the application of silicon carbide goes far beyond that.
Silicon carbide, as a high-performance material, has attracted much attention in the semiconductor industry in recent years. However, the application of silicon carbide goes far beyond that. It is not only used in the manufacture of power devices, but also widely used in various fields as abrasives, cutting tools, structural materials, optical materials, and catalyst carriers.
Silicon carbide ceramics have a series of remarkable properties: chemical stability, high temperature resistance, wear resistance, corrosion resistance, high thermal conductivity, low thermal expansion coefficient, lightweight, and high mechanical strength. These characteristics make it an ideal material for many industries, including photovoltaic semiconductor equipment, lithium battery equipment, high-temperature industrial furnaces, chemical machinery, energy and environmental protection, metallurgy, national defense and military industry, and aerospace.
As an advanced special ceramic, silicon carbide ceramics have a hardness second only to diamond and boron carbide, with a Mohs hardness of up to 9.5, demonstrating excellent wear resistance. This makes silicon carbide ceramics very suitable for sliding parts with high wear resistance requirements, such as mechanical seals. Its high Young's modulus and low thermal expansion coefficient also make it an ideal material for manufacturing high-precision components such as optical components and substrates. Silicon carbide ceramics are high-density sintered bodies that can achieve mirror processing. It can withstand high temperatures exceeding 1500 ° C, has excellent heat shock resistance and chemical stability, and is suitable for manufacturing SiC suction cups, SiC sheaths, as well as thin and thick walled products.
Silicon carbide composite ceramic materials are mainly composed of SiC and Si, formed by adding additives, and then placed in a nitriding furnace with high-purity nitrogen gas, and nitrided and sintered at a certain temperature. The preparation methods of silicon carbide ceramics include reaction sintering, recrystallization sintering, hot pressing sintering, pressureless sintering, etc. Silicon carbide components used in conductor equipment include water-cooled plates, suction cups, and crystal boats, which have the characteristics of high precision, high purity, and strong resistance to chemical and ion corrosion. The application of silicon carbide ceramics in the semiconductor field in industrial kilns has mainly evolved from traditional industrial structural ceramics such as structural components for daily and sanitary ceramic kilns to various high-end industrial structural ceramics such as structural components for new energy and semiconductor kilns.
In the future, with the increasing penetration rate of new energy vehicles, energy, industry, communication and other fields, as well as the increasingly strict requirements for high-precision, high wear resistance, and high reliability mechanical components or electronic components in various fields, the market size of silicon carbide ceramic products is expected to continue to expand, among which new energy vehicles and photovoltaics are important development areas.
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