What Is The Thermal Conductivity Of Aluminium Nitride?

Thermal conductivity is a measure of how well a material conducts heat. The thermal conductivity of aluminum nitride (AlN) depends on various factors such as temperature, purity, crystal structure, and microstructure.

At room temperature, the thermal conductivity of high-purity single-crystal AlN can be as high as 320 W/m-K, making it a highly efficient heat conductor. However, the thermal conductivity of polycrystalline AlN typically ranges from 100-200 W/m-K due to the presence of grain boundaries and impurities that hinder heat transfer.

The thermal conductivity of AlN also increases with increasing temperature due to the greater lattice vibrations that occur at higher temperatures. At temperatures above 1000°C, the thermal conductivity of AlN can exceed 400 W/m-K.

In summary, the thermal conductivity of AlN can vary depending on several factors but generally ranges between 100-320 W/m-K, making it a good choice for applications that require high thermal conductivity, such as in electronic packaging, power modules, and LED lighting.