Graphitization at low temperatures (600-1200 °C) in the presence of iron implications in planetology
- Charon, E.
- Rouzaud, J.-N.
- Aleon, J.
DOIAbstract
International audienceOur objective is to understand how graphite can be formed at "low" temperatures (<1200 °C) in contrast to the high temperature of the industrial processes (∼3000 °C), and from precursors which are non-graphitizable by a thermal treatment alone. Blends of iron and saccharose char were heated between 650 and 1600 °C. The carbons obtained were characterized by SEM, TEM and Raman microspectrometry. Our work confirms that graphite can be formed from non-graphitizable carbons during a heat-treatment in the presence of iron. Carbon and iron migrations, below the eutectic temperature (1150 °C), appear to be a key factor for carbon transformation. Iron migration and graphitization could be favored by nucleation of Fe nanopartic...
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