METHOD OF MAKING MOISTURE RESISTANT ALUMINUM NITRIDE POWDER AND POWDER PRODUCED THEREBY

摘要

A method for making a moisture-resistant aluminum nitride-containing powderwhich includes (a) coating a layer of silicateonto alulminum nitride-containing powder having aluminum nitride on at least aportion of its surface and (b) heat-treatingthe coated aluminum nitride-containing powder at a temperature of from 350 to1000 °C for a period of time sufficient to causethe silicate to react with the surface aluminum nitride thereby forming alayer of Si-Al-O-N bonded to the surface aluminumnitride. The silicate has alkyl or alkoxyalkyl radicals attached thereto. Themethod yields a moisture-resistant aluminumnitride-containing powder having a layer of Si-Al-O-N reaction-bonded to thesurface aluminum nitride.