炭素材料粉末の黒鉛化処理における加熱雰囲気の影響  [in Japanese] Effect of Gas Atmosphere on Graphitization of Carbon Powder  [in Japanese]

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Abstract

現在,黒鉛化処理した炭素材は,さまざまな分野で使用されている.しかし,黒鉛化処理には,莫大なエネルギーが必要であり,大気中に炭素ガスなどを放出するという問題を抱えている.そこで本研究では,環境負荷が少なく,電気エネルギーを削減でき,かつ,十分黒鉛化度を上げることができる熱処理方法について検討した.具体的には,炭素材を種々の黒鉛化炉で黒鉛化処理を行い,粉体特性の変化について検討した.その中で,黒鉛化時の雰囲気ガスの影響について着目した.その結果,窒素ガス中での黒鉛化処理は,アルゴンガス中での黒鉛化処理に比べて,黒鉛化が進行し易い事が確認され,また,黒鉛化温度も300˚C低減できた.

Graphitization of the carbon materials used in battery electrodes and other fields is high temperature process that requires an enormous amount of energy and generates large quantities of carbon gases. Therefore, it is desirable to develop a new heat-treatment method that can reduce electricity consumption and lighten the environmental load while ensuring a sufficient degree of graphitization. In this study, several carbon materials were graphitized in various kinds of furnaces, and the changes in the carbon powder properties were examined. In particular, the influence of atmosphere on the graphitization behavior was examined in detail. It was found that graphitization proceeded more readily in an atmosphere of nitrogen gas than in argon gas, and the graphitization temperature could be reduced to about 300°C.

Journal

  • KAGAKU KOGAKU RONBUNSHU

    KAGAKU KOGAKU RONBUNSHU 40(1), 12-17, 2014

    The Society of Chemical Engineers, Japan

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