Ceramics-Silikáty 39, (3) 99 - 104 (1995)

Dehydrogenation of coal-tar pitch with sulphur influences the behaviour of pitch in subsequent carbonization. The carbon yield gets up and chemorheological property changes. Conditions for mesophase formulation are worse because of an increasing viscosity. In extreme case the solidification is done during the dehydrogenation by sulphur. We can control anisotropy and mechanical properties of carbonizates whereby sulphur modification of pitch.