Silicon Carbide Applications

Silicon Carbide has a large number of applications in emerging industries and traditional industries. At present, the global semiconductor market has exceeded 100 billion yuan. It is expected that by 2025, the global sales of semiconductor manufacturing materials will reach 39.5 billion US dollars, of which the silicon carbide semiconductor market is expected to reach a market size of 2.5 billion US dollars in 2025. At the same time, silicon carbide is still the material with the best application performance in traditional ceramics, refractory, high temperature, grinding and other fields.

1. Semiconductor field

Grinding discs, fixtures, etc. are important process equipment for silicon wafer production in the semiconductor industry. The grinding disc using silicon carbide ceramics has high hardness, low wear, and the thermal expansion coefficient is basically the same as that of the silicon wafer, so it can be grinded and polished at high speed. In addition, when silicon wafers are produced, they need to undergo high-temperature heat treatment, and silicon carbide fixtures are often used for transportation. In addition, as a representative of the third generation of wide band gap semiconductor materials, compared with silicon (Si) and gallium arsenide (GaAs), silicon carbide single crystal material has a large band gap, high thermal conductivity, and high electron saturation mobility rate. and advanced properties of breakdown electric field. SiC devices make up for the shortcomings of traditional semiconductor materials in practical applications and have gradually become the mainstream of power semiconductors.

2. Silicon Carbide conductive ceramics

Silicon carbide is a very important engineering ceramic. However, due to the brittleness, high hardness and high resistivity of SiC ceramics, it is very difficult to process and manufacture large-sized or complex-shaped SiC ceramic parts. In order to improve the machinability of SiC ceramics , the machining performance of SiC ceramics can be improved by making SiC ceramics into conductive ceramics and using electric discharge processing. When the resistivity of SiC ceramics is controlled to drop below 100Ω·cm, it can meet the requirements of EDM and perform fast and accurate complex surface processing, which is beneficial to the processing and manufacturing of large-sized or complex-shaped components.

3. Wear resistance area

The hardness of silicon carbide is second only to diamond and boron carbide, and it is a commonly used abrasive. Due to its superhard properties, it can be prepared into various grinding wheels, emery cloths, sandpapers and various abrasives, and is widely used in the mechanical processing industry.

At the same time, the high hardness and low friction coefficient of silicon carbide give it excellent wear resistance and are particularly suitable for various sliding friction and wear conditions. Silicon carbide can be processed into sealing rings with various shapes, dimensional accuracy and high surface finish. As well as bearings, etc., they are used as mechanical parts in many harsh environments and have the characteristics of good air tightness and long service life.

Silicon Carbide also has many application areas, such as corrosive environments, high-temperature applications, etc. Its applications in high-tech fields such as semiconductors, nuclear energy, national defense and space technology are also constantly expanding, and its application prospects are very broad.