THE ESTIMATION OF THE ROTATIONAL MISORIENTATION BY THE PROJECTED PROBABILITY FUNCTION OF A DISPLACEMENT OF CARBON LAYER PLANES

The projected probability function (PPF) for the first nearest neighbo r carbon layer plane was calculated for the mesocarbon microbeads (MCM B) based on the theory proposed by Houska and Warren for the turbostra tic nature. The degree of rotational misorientation was estimated from the displacement of the two peak tops on the PPF pattern, and the ang le of misorientation decreased with increasing the heat-treatment temp erature (HTT) of MCMB. The simulation of turbostratic nature of layer stacking based on the angle of misorientation showed the moire pattern formed by a pair of the nearest layer planes. The long-range periodic ity due to the moire pattern increased with increasing the HTT. Copyri ght (C) 1996 Elsevier Science Ltd