| abstract |
The present invention relates to a method for producing a water-resistant aluminum nitride powder, which is characterized in that, in a solvent, an aluminum nitride powder dispersed in the solvent in such a manner that a ratio of a median diameter to a primary particle diameter is 1.4 to 5 is obtained. Contacting at least one phosphoric acid compound selected from the group consisting of phosphoric acid, a metal salt of phosphoric acid, and an organic phosphoric acid having an organic group having 12 or less carbon atoms, and performing a phosphoric acid compound treatment step, and the surface of the foregoing aluminum nitride powder is present The phosphoric acid compound is converted to a ratio of 0.5 to 10 mg/m 2 in terms of orthophosphate ion. |