【摘要】 以湖南鲁塘、湖南新化和陕西凤县典型矿区采集的不同石墨化度的天然煤系隐晶质石墨为研究对象,利用日本理学D/Max-2500PC型粉末X射线衍射仪和英国Renishaw in Via型显微拉曼光谱仪对煤系隐晶质石墨的晶体结构进行分析,通过表征不同石墨化度样品电阻率的变化,来探索石墨微晶结构与其导电性能的关系变化趋势。研究结果表明,室温时石墨的电阻率与其微晶层间距d002的变化趋势呈现正相关,而与其平均微晶尺寸La的变化趋势呈现负相关;煤系石墨成矿过程中,石墨化度的增加有利于石墨导电性能的形成,而石墨无序度增加则不利于石墨导电性能的形成。更多还原

【Abstract】 This paper takes the natural coal-based cryptocrystalline graphite with different graphitization degree collected in the typical mining area of Lutang of Hunan province,Xinhua of Hunan province, and Fengxian of Shanxi province as the research object.The crystal structure of coal-based aphanitic graphite was analyzed by D/Max-2500 PC powder X-ray diffractometer and Renishaw in Via type micro-Raman spectrometer. The changes of resistivity of different graphitization samples were studied to explore the relationship between microcrystalline graphite structure and its conductivity variation trend. The results show that the resistivity of graphite at room temperature is positively correlated with the variation trend of microcrystalline spacing d002, but negatively correlated with the change trend of average crystallite size La. The increase of graphitization degree in coal-based graphite mineralization process is beneficial to the formation of graphite conductive properties. The increase of graphite’s disorder is not conducive to the formation of graphite conductivity.更多还原