| 摘要 |
[Problem] To provide a method of producing aluminum nitride that has high conducting property and can be excellently filled and is useful as a filler for heat-radiating materials, and an aluminum nitride powder obtained by the same method. [Means for Solution] An aluminum nitride powder is produced by reducing and nitriding:
an alumina powder or a hydrated alumina powder having a primary grain size of 0.001 to 6 µm; and
a powder of a compound containing a rare earth metal element and having an average grain size in a range of 2 µm to 80 µm, the average grain size being not less than 6 times as great as the primary grain size of the alumina powder or the hydrated alumina powder;
in the presence of a carbon powder at a temperature of 1620°C to 1900°C for not less than 2 hours. |
