Abstract
Effects of carbon materials on weight yields of (C60+C70) and weight ratios of C60 to (C60+C70) in soot were examined by the Joule resistive heating of four kinds of carbon materials at He gas pressures from 0.7×104 to 8.0×104 Pa for collector radii of 45, 50 and 55 mm. The yields were in the range of 1 to 8% for graphite with hexagonal lattice, and better than those for glassy carbon. The most effective He gas pressures for the fullerene yields were in the range of 4.0 to 5.3×104 Pa. Any collector radii dependence of the yields was not observed. The weight ratios of C60 to (C60+C70) were about 60 to 70%, and showed neither He gas pressure dependence nor collector radii dependence for four kinds of carbon materials.
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