H_2O_2処理黒鉛の繰り返し高温処理によるAr吸着への影響

概要

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A natural–graphite powder previously oxidized in H2O2 aq.soln. was heated under flow of 1 atm Ar at 1000℃repeatedly, and measured volumetrically for its adsorption–desorption isotherms of Ar at –196℃ after each heattreatment. It was found that the more often the graphite was heated, the less the amount of Ar adsorbed became.Every sample gave the adsorption isotherm with a remarkable step over the relative pressures from 0.3to 0.4. And besides, the hysteresis between the adsorption branch and the desorption one did not change inshape through repetition of the heat treatment at 1000℃. These facts are briefly discussed in terms of porosityfor the graphite samples.
津山工業高等専門学校の論文