Abstract
The change of D. T. A. curve for carbon and graphite under air oxidation was studied by micro differential thermal analysis (D. T. A.) method.By analysing the peak position, it was found that the temperature of the peak maximum (Tm) represents some intrinsic carbon properties: The Tm value seemed to correspond to its reactivity for oxidation, and a certain relation was observed with crystallite size Lc(002) and lattice spacing Co.The D. T. A. curve for reactor grade graphite showed a single exothermic peak. In case of binary mixture of two types of carbon, some shifts of the peak positions in the D. T. A. curve was observed.The peak shape and peak position for carbonized furfural-resin was found to vary remarkably with heat-treatment temperature. For the 2460°C H. T. T. sample, two sharp peaks was observed in x-ray diffraction profile and also in the D. T. A. curve under air oxidation. It was suggested that the 2460°C H. T. T. may be constituted of at least two kinds of carbons which had different oxidation reactivities.
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