STRUCTURAL CHARACTERIZATION OF GRAPHITIZATION PROCESS IN PYROCARBONS

A series of pyrocarbons, vapodeposited then heat treated from 1700-deg rees-C up to 2800-degrees-C, was structurally characterized. Interlaye r distances and mosaic spreads were measured. By analysis of the 101 a nd 111 bands, the graphitization rate, the domain sizes, and the graph itization process were determined. The methods, ab-initio calculations and phenomenological analyses are compared, and the physical meaning of some parameters are ascertained. The results are correlated to diff erent types of disorder, used in the interpretation of transport prope rties.