Moreover, the development of graphite-like particles (flakes, microspheres, and crystalline aggregates) seems to be also related to the presence of inorganic material. The mineral matter present in a set of coal samples was found to lead to the formation of carbides (by carbothermal reactions) during high temperature treatment. The carbides may act as a catalyst and/or as a template for the formation of those graphite-like structures. Further increasing the temperature of treatment allows the catalyst to sublimate or decompose, while the graphitic carbon remains in the sample because it is more stable at higher temperatures.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址:北京市海淀区学院路29号 邮编:100083 电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700 |