Electrically conductive property of dense alumina/nano-carbon network composite fabricated by combination of gelcasting and argon sintering

Alumina and nano carbon network (NCN) composites material for electrical conductive use are fabricated by a combination of gelcasting method and sintering under argon atmosphere. This paper describes a characterization of the NCN composites. On the surface and boundary of alumina particles, the NCN was homogeneously observed by SEM. High graphitization and a few defects on the graphite structure could be confirmed on the carbon structure analysis by Raman spectroscopy. The electrical conductivity shows the semiconductor like behavior depending on the defects in the carbon. Effect of the graphite structure on electrical conductivity was shown.