炭素繊維の感湿性電気比抵抗に及ぼす微細構造の影響

概要

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The complex impedance of pitch-based carbon fibers was investigated under different relative humidities at 25℃ in the frequency range of 5 Hz to 13 MHz. The resistance of pitch-based carbon fibers was humidity sensitive and the sensitivity decreased with increasing temperature of carbonization, which was consistent with the results of resistance measurement by D.C. two-probe method. The characterization of the carbon fibers by WAXD and FT-IR showed that the pitch-based carbon fibers had a randomly oriented layer structure and that oxygen-containing functional groups were formed on surface. It was suggested that the humidity sensitive properties of pitch-based carbon fibers be related to exposed active carbon atoms at the edge sites of the graphite-like basal plane and oxygen-containing functional groups on the surface of carbon fibers.
社団法人日本セラミックス協会の論文
1993-04-01