Preparation and Structures of Mesocarbon Microbeads

Abstract

MCMB were prepared from coal-tar pitch by pyrolysis condensation in the presence of graphite. The characteristics of the MCMB were studied by BET and optical textures of the pitch mixtures were characterized by polarized-light microscopy. Results show that the graphite addition contributes to an increase of MCMB yield. The pyrolysis conditions and content of graphite have notable effect on the structure and yields of MCMB. When content of graphite reaches 3% and the pitch are pyrolysated at 450°C for 4 h, the MCMB yield arrive at 32wt%.