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中间相炭微球之碳层结构随温度演变的扫描电子显微镜分析 被引量:9

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摘要 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.
出处 《科学通报》 EI CAS CSCD 北大核心 2004年第7期633-638,共6页 Chinese Science Bulletin
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参考文献31

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