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Performance of nitrogen-carbon bonded silicon carbide products at high temperatures
- Dec 14, 2018 -

Nitrogen-carbon bonded silicon carbide products also have outstanding performance at high temperatures. For example, the flexural strength is 4-8 times that of ordinary refractory materials; the thermal expansion coefficient is half of that of high-alumina refractories; and the thermal conductivity is 7~ of general refractory materials. 8 times, the strength increases with the increase of temperature. When the temperature rises to 1400 °C, the strength begins to decrease; but when the temperature drops 1500 °C, the normal temperature flexural strength index is maintained.


The thermal conductivity of nitrogen-carbon bonded silicon carbide products gradually decreases with the increase of temperature, and has the characteristics of high density, high strength, good thermal shock resistance, high load softening point, good thermal conductivity and high resistance value; and has excellent resistance. Melting and oxidation resistance of cryolite, aluminum fluoride, sodium fluoride and calcium fluoride.


Nitrogen-carbon bonded silicon carbide products are hard and have a Mohs hardness of about 9. They are high-hardness materials in non-metallic materials, and their hardness is second only to diamond. The coefficient of thermal expansion is small, compared with the thermal conductivity of products such as silicon carbide, it is not easy to produce thermal stress thermal shock stability, long service life and high temperature creep resistance, corrosion resistance, extreme cold and extreme heat, for products with high dimensional accuracy requirements Is a good choice.