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以含有喹啉不溶物的煤焦油沥青为原料制得了具有尺寸分布窄、球形度好、球体无明显黏连且易石墨化的中间相炭微球(MCMB).通过光学法和扫描电子显微镜(SEM)法对MCMB的结构进行分析后发现,光学法不能用于研究结构复杂的MCMB的结构,更不能用于不同温度下球体结构的分析;而SEM法则可以,并能获得直观的结构照片.虽然实验中获得的MCMB的织构十分复杂,但根据其织构层特征大体上可以分为两种:一种为“平行层”结构:另一种为具有一端或两端碳层收缩的“弯曲层”结构.实验中利用SEM法对不同温度下热处理的MCMB的结构进行了分析,发现未经进一步热处理的MCMB的断面不能给出球体结构的任何信息,而热处理温度提高到1000℃后获得的MCMB的断面则呈现出了明显的碳层结构.随着热处理温度的提高,MCMB的碳层有逐渐细化和趋于平整的趋势.
The mesophase carbon microspheres (MCMB) with narrow size distribution, good sphericity and no obvious viscosities were prepared by using coal tar pitch containing quinoline insolubles as raw material.The optical microstructure of the mesocarbon microbeads (MCMB) was characterized by optical methods and scanning electron microscopy SEM) analysis of the structure of MCMB found that the optical method can not be used to study the structure of the complex structure of MCMB, but also can not be used for analysis of the structure of the sphere at different temperatures; and SEM method can be obtained and intuitive structural photos. Although the texture of the MCMB obtained in the experiment is very complicated, it can be divided into two kinds according to its texture features: one is a “parallel layer” structure: the other is a carbon layer with one or both ends shrinking “ Bent layer. ”In the experiment, the structure of MCMB heat-treated at different temperatures was analyzed by SEM, and it was found that the section of MCMB without any further heat treatment could not give any information about the structure of the spheres. However, when the heat treatment temperature was raised to 1000 ° C, Of the MCMB cross section showed a clear carbon layer structure.With the heat treatment temperature increases, MCMB carbon layer gradually refined and tends to be flat.