Summary
X-ray diffraction, scanning electron microscopy, Mossbauer and Raman spectroscopy have been used for finding out structural modifications arising as a result of thermal decomposition of fullerite C60/70 at heating to 1600 °C in CO medium. The scheme of the structural modifications of fullerite on the preliminary graphitization temperatures is given. It’s proven that the thermal disordering of fullerite with the formation of a fullerite-like amorphous part is noticed at heating above 900 °C. The following ordering of carbon takes place on the temperature of 1600 °C with the formation of a graphite-like amorphous part. The graphitization course of proceeds with the formation of turbostratic carbon and crystalline graphite with a low diploma of ordering. The character of the formation of carbon substructures is taken into account. Carbon structural modifications are accompanied by morphological modifications. Comparative research of modifications within the construction of soot, graphite and glass-like carbon throughout heating have been introduced. The catalytic impact of Fe on the processes of the disordering of preliminary fullerite is taken into account. It’s proven that within the Fe presence the temperature of the part transition ‘fullerite-graphite’ decreases from 1600 to 760 °C. Graphite, fashioned after the Fe3C decomposition, is characterised by the next diploma of ordering.
