Abstract
Furan-resin is one of the thermosetting resins. Carbons synthesized from thermosetting resins are generally grouped into non-graphitizable carbons. We investigated the microstructures of furan-resin-derived carbon under high-temperature heat treatments in detail by transmission electron microscopy. The carbons heat-treated at 1773 K or lower temperatures exhibited amorphous structure. The carbon heat-treated at 2073 K revealed a cage structure composed of several wavy graphene layers. The specimens heat-treated at higher temperatures exhibited a more developed cage structure, as evidenced by the number of stacked layers and the periodicity. In the case of 3273 K, about 10 graphene layers formed the cage structure and the cage periodicity was approximately 6 nm.
