Surface graphitization of Furan-resin-derived carbon

Furan-resin-derived carbon generally produces a glass-like carbon having en tangled graphene layers (graphite structure) after high temperature heat-tr eatments. However, Raman spectroscopy reveals that it produces well-graphit ized thin skins on surfaces. The graphitization is promoted on the faces th at are formed at lower heat-treatment temperatures. Fractured faces of spec imens pre-heat-treated at 1000 degreesC result in well-developed structures in graphitization after re-heat-treatment at 3000 degreesC. It is consider ed that the surfaces, i.e. free faces, play an important role in the graphi tization. (C) 2001 Elsevier Science Ltd. All rights reserved.