Effect of Post-Heat-Treatment on Various Characteristics of Commercial Pitch-Based Carbon Fibers Yoon, Sung-Bong; Cho, Chae-Wook; Cho, Dong-Hwan; Park, Jong-Kyoo; Lee, Jae-Yeol;
In this study, commercially available pitch-based carbon fibers of general grade were post-heat-treated using a boxtype high temperature furnace at , , , and , respectively. The fundamental characteristics of each heat-treated carbon fibers were investigated in terms of chemical composition, morphology, thermal stability, X-ray diffraction, single filament tensile test, and electrical resistivity. The result showed that the fiber properties were significantly influenced by the post-heat-treatment, indicating the greater effect with increasing treatment temperature. The carbon contents, thermal stability, and tensile properties of the carbon fibers used here were further increased by the post-heat-treatment, whereas the d-spacing between graphene layers and the electrical resistivity were reduced with increasing post-heat-treatment temperature.