| 摘要 |
PURPOSE:To prevent Al powder from fusing, to completely advance nitriding reaction and to obtain desired AlN in high productivity, by forming an oxidized coating film on the surface of Al powder by chemical oxidation method and heating in a N2 gas and/or NH3 gas atmosphere at >= the melting point of Al. CONSTITUTION:Al powder obtained by atomizing method is treated by chemical oxidation method such as treatment with pressurized steam or high-temperature water and an oxidized coating film on the surface of Al powder to give Al powder coated with the oxidized coating film having 5-200mum particle diameter and >=0.5% O2 content. Then the Al powder is optionally heat-treated preliminarily at >=200 deg.C and <= the melting point of Al for >=2min and reacted under heating in a N2 gas and/or NH3 gas atmosphere at >= the melting point of Al to give AlN.
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