Abstract
The method of Warren and Averbach was used for the analysis of the (001) X-ray line profiles of various carbons yielding the mean crystallite size L ̄ c in the c-direction and the mean square fractional displacements 〈 Z n 2〉. In some cases the mean crystallite size reveals the same dependence on the heat treatment temperature as the crystallite size calculated from the line width using simplified methods. For spirally grown pyrolitic carbon however the effect of heat treatment consists in a diminution of the lattice displacement while the L c remains nearly constant. Therefore in such cases the mean square fractional displacements can give additional information. Furthermore it was found that for all artificial carbon bodies and filler cokes and also for the pyrolitic carbons a linear relation exists between 〈 Z 1 2〉 and the mean interlayer distance c ̄ 2 . The slopes of the straight lines are different for the various carbon types; they could therefore be used as additional characteristics for the structure of the material.
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