Silicon Carbide Ceramics

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Silicon carbide (SiC) ceramic is a ceramic material made from silicon carbide powder that has many excellent properties.
First of all, silicon carbide ceramics have high hardness, which is second only to diamond and boron nitride, making it an ideal wear-resistant material. In addition, silicon carbide ceramics also have high strength, good corrosion resistance, oxidation resistance and low thermal expansion coefficient.
Secondly, silicon carbide ceramics also show good stability at high temperatures, and their high-temperature mechanical properties are the best among known ceramic materials. It can maintain strength and stiffness at high temperatures up to 1600°C or even 2000°C without plastic deformation and softening. This characteristic makes silicon carbide ceramics a high-quality high-temperature structural material, which is widely used in fields such as high-temperature bearings, bulletproof plates, nozzles, high-temperature corrosion-resistant components, and electronic equipment components in high-temperature and high-frequency ranges.
In addition, silicon carbide ceramics also have good thermal conductivity and electrical properties, and its thermal conductivity is second only to beryllium oxide ceramics among ceramics. This characteristic makes silicon carbide ceramics a high-quality refractory material that can be used to manufacture a variety of components that need to withstand high temperatures and have good thermal conductivity.


Silicon carbide ceramic is an inorganic non-metallic material made of silicon carbide (SiC) as the main raw material and sintered at high temperature. Silicon carbide ceramics have a variety of excellent properties, such as high hardness, high strength, high temperature resistance, oxidation resistance, corrosion resistance, low thermal expansion coefficient and good thermal conductivity and electrical properties. These properties make silicon carbide ceramics widely used in many fields.

Properties of silicon carbide ceramics:
1. It has high chemical stability, low thermal expansion coefficient, high thermal conductivity, and its resistance temperature characteristics are opposite to those of metals.
2. It has high hardness, with Mohs hardness reaching 9.5, second only to diamond. It is a high-quality wear-resistant additive.
3. Wear resistance, high temperature resistance, corrosion resistance, acid and alkali solvent resistance.
4. It has good toughness, grinding performance and electrical dissipation and thermal conductivity.
5. It has good thermal conductivity and can resist oxidation at high temperatures.
Advantages of silicon carbide ceramics:
1. Silicon carbide has high electrical conductivity, its electrical conductivity can reach 60%-80%, and it is a good electronic material.
2. It has high temperature resistance, with a melting point as high as 2800°C, and can maintain stability under high temperature conditions.
3. It has excellent thermal stability, is not easy to change in high temperature environments, and has a high service life.
4. Silicon carbide has high strength and can withstand high pressure and high-intensity loads.
5. Has good wear resistance and can resist friction and wear.
6. It has good radiation resistance and can resist the radiation of high-energy particles.
Applications of silicon carbide ceramics:
1. Silicon carbide can be used for cutting and precision grinding of crystals, precision grinding of hard glass, slicing of single crystal silicon and polycrystalline silicon rods, precision grinding of single crystal silicon wafers, processing of superhard metals, and soft metals such as copper and copper alloys. processing and other fields.
2. In the field of electronics, silicon carbide can develop power supplies that are more suitable for harsh conditions such as high power, high frequency, high temperature, and high voltage due to its advantages such as large band gap, large drift rate, large thermal conductivity, and large breakdown field strength. Semiconductor device.
3. Silicon carbide is also widely used in abrasives, wear-resistant agents, abrasive tools, advanced refractory materials, fine ceramics and other fields.

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Related Materials: Al2O3 · ZrO2 · ZTA

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