Abstract
Carbon/graphite material was prepared by subjecting a mixture of coaltar pitch binder and a relevant filler to uniaxial compression at 150MPa for 10min, followed by calcination at 1300℃ for 1 h, and graphitization at 2300℃ in an induction furnace. Four fillers, carbon black (CB), petroleumcoke powder, needlecoke powder, and natural graphite powder (NG), were used. The effect of filler type on the performance and microstructure of the material was investigated. Results reveal that the CBbased material has excellent flexural and compressive strength, with the highest values of 88.0 and 173.2MPa, respectively, but poor thermal and electrical conductivity. The thermal conductivity of the NGbased material has the highest value of 278W/m·K, but the flexural and compressive strength are limited to 51.1 and 90.2MPa, respectively. Microstructural analysis showed that the NGbased material has the largest crystallite size, as well as the most perfect orientation of graphite layers.
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