窒化アルミニウム粒子の耐水性におよぼす機械的処理によるグラフェン被覆の影響

抄録

In order to give water resistance to aluminum nitride particles for preparation of ceramics using aqueous slurry, graphene coating by mechanical treatment on the particles was investigated. Graphene coating was observed on the surface of the fine aluminum nitride particles which was obtained by mechanical treatment of mixed powder of graphene and aluminum nitride in a compression and shear field. The graphene-coated aluminum nitride particles showed excellent water resistance, since the pH value of the aqueous suspension did not change and aluminum hydroxide was not detected even after stirring for long time. The relative density of the aluminum nitride ceramics obtained with the composite particles was high, and their secondary phase was also found to be yttrium aluminate having less oxygen than those prepared without graphene coating, due to suppressed hydrolysis.