Method for manufacturing aluminum nitride powder

摘要

A method for manufacturing aluminum nitride powder includes steps of: preparing a polymer powder, a wood powder having grain size similar with that of the polymer powder, and an alumina powder; and mixing the polymer powder, the wood powder and the alumina powder uniformly and forming granules to be carried out a single-replacement reaction by exposing the granules in a nitrogen-containing atmosphere at a temperature of 1680-1850° C.

主权项

1. A method for manufacturing aluminum nitride powder comprising steps of:
preparing a polymer powder, a wood powder, a carbon black and an alumina powder; mixing the polymer powder, the wood powder, the carbon black and the alumina powder uniformly and forming granules; performing a single-replacement reaction by exposing the granules in a nitrogen-containing atmosphere at a temperature of 1680-1850° C., such that carbon atoms of the granules act as a medium for replacement reaction, and most of oxygen atoms are separated from alumina via crystal vibration and replaced by nitrogen atoms to form the aluminum nitride powder; and performing a decarbonization treatment to remove carbon by providing an oxygen-containing gas flowing through the aluminum nitride powder at a temperature of 600-800° C.; wherein a weight ratio of the polymer powder and the wood powder is in a range of 0.15:1 to 0.42:1.