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Decomposition of fullerite during the high-temperature heatingстатья
- Авторы: Nikonova R.M., Larionova N.S., Lad’yanov V.I.
- Журнал: Fullerenes, Nanotubes and Carbon Nanostructures
- Том: 31
- Номер: 4
- Год издания: 2023
- Издательство: Taylor & Francis
- Местоположение издательства: United Kingdom
- Первая страница: 336
- Последняя страница: 348
- DOI: 10.1080/1536383X.2022.2159388
- Аннотация: X-ray diffraction, scanning electron microscopy, Mossbauer and Raman spectroscopy have been usedfor studying structural changes arising due to the thermal decomposition of fullerite C60/70 at heatingto 1600 C in CO medium. The scheme of the structural changes of fullerite at the initial graphitization temperatures is given. It is shown that the thermal disordering of fullerite with the formation of a fullerite-like amorphous phase is observed at heating above 900 C. The subsequent ordering of carbontakes place at the temperature of 1600 C with the formation of a graphite-like amorphous phase. Thegraphitization process proceeds with the formation of turbostratic carbon and crystalline graphite witha low degree of ordering. The nature of the formation of carbon substructures is considered. Carbonstructural changes are accompanied by morphological changes. Comparative studies of changes in thestructure of soot, graphite and glass-like carbon during heating have been presented. The catalyticeffect of Fe on the processes of the disordering of initial fullerite is considered. It is shown that in theFe presence the temperature of the phase transition ‘fullerite-graphite’ decreases from 1600 to 760 C.Graphite, formed after the Fe3C decomposition, is characterized by a higher degree of ordering.
- Добавил в систему: Ларионова Настасья Сергеевна