Thermal Properties Of Silicon Nitride

High melting point Silicon

nitride has a melting point of almost 1900°C and does not undergo chemical degradation or significant structural changes in high-temperature environments. This high melting point allows silicon nitride to exhibit excellent thermal stability in high-temperature industries and extreme temperature conditions. For example, in high-temperature furnaces and aircraft engine parts, silicon nitride can maintain stable performance for a long time, effectively improving the reliability and safety of equipment.

Low coefficient of thermal expansion

The coefficient of thermal expansion of silicon nitride is about 2.8×10-⁶/°C, which is much lower than most metal materials. Such a low coefficient of thermal expansion gives silicon nitride excellent dimensional stability, it is not easily deformed or cracked even with a sudden change in temperature. In high-speed precision instruments or mechanical parts, the low thermal expansion performance of silicon nitride ensures accurate fitting of parts and does not affect the normal operation of the equipment due to thermal expansion.

Good Thermal Shock

Resistance Thermal shock resistance refers to the stability of a material under sudden changes in temperature, which is usually manifested by the fact that the material is less likely to be subjected to thermal cracking or cracking. Silicon nitride has excellent resistance to thermal shocks and is not susceptible to cracking, even with rapid cooling at extremely high temperatures. This property is extremely important in applications such as aircraft engines and high-temperature industrial furnaces, and allows you to maintain a long service life in conditions with frequent temperature changes.