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The changes in the structure and some physical properties of mesocarbon microbeads by heat treatment

✍ Scribed by Jun-Ichi Ozaki; Yoshiyuki Nishiyama

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
540 KB
Volume
25
Category
Article
ISSN
0008-6223

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✦ Synopsis

Abstrrsct-The carbonization process of type C mesocarbon microbeads was studied using X-ray diffraction (XD), XPS and PI-IR. The intensity of absorption continued from the visible to the IR region observed by FT-IR spectroscopy and increased with the heat treatment. A theory of amorphous semiconductors was applied to simuiate the absorption edge, and it was found that a factor relating to the absorption A correlated well with the diameter of graphite-like crystallite (L,,) obtained from XD for the specimens heat-treated above 700Β°C. ALSO, A was found to have good correlation with a valence band peak in XPS spectra, and this was interpreted by the increase in the density of electronic states, which-could be excited by the infrared ray.

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