中间相炭微球的制备及结构研究

以煤沥青为原料,采用热聚合的方法,在不同的保温时间下制备出中间相炭微球,通过SEM、激光粒度分析和XRD等分析手段对其表面形貌、粒径分布和微晶结构进行了分析,研究了聚合时间对其球形度、表面QI、粒径分布、微晶结构的影响.结果表明:随着保温时间的延长,中间相炭微球的球形度均较好,表面的QI减少,表面变得比较光滑,粒径分布变得比较集中,微晶结构也较好,当进一步延长保温时间,粒径分布又变得比较分散,微晶结构也变差.

Preparation and structures of mesocarbon microbeads

Preparation mesocarbon microbeads (MCMB) with coal-tar pitch by heat condensation at different heat treatment time (HTT).The appearance and particle size distribution of the MCMB are investigated by SEM, laser particle size analyzer and XRD,respectively.The results indicate that the sphericity degree of MCMB is improved with increasing HTT,and the quinoline-insoluble of the MCMB decrease and thus the MCMB surface become smoother.Moreover,Their particle size distribution become narrow and the micro-crystal structures are better with increasing HTT.However,their particle size distribution get into wide and the micro-crystal struc- ture become worse when HTT is further increased.