Preparation of Graphene Nanosheet/Alumina Composites

Abstract

Graphene nanosheet (GNS)/ Al 2 O 3 composite powder with homogeneously distributed GNSs has been fabricated from wet ball milled expanded graphite and Al 2 O 3 , and then followed by the rotary evaporator at relatively low temperature to dry the mixture and the residual solvent was removed in atmosphere-vacuum pipe-type furnace accessing mixed gases of Argon and Hydrogen at 600 for 6h. During the process, homogeneously dispersed and mixed GNS/ Al 2 O 3 composite powders with quite few damage of GNSs structure and properties have been obtained. The microstructures and grain sizes of GNS/ Al 2 O 3 composite powders have been investigated. The results showed that the addition of GNSs had diminished the size of Al 2 O 3 particles and also the as-prepared GNSs/ Al 2 O 3 composite powders can be dispersed and mixed more homogeneously remarkably with the presence of GNSs.