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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。
The natural graphite cryptographitic graphite with different degree of graphitization collected from Lutang in Hunan, Xinhua in Hunan and Fengxian in Shaanxi was used as the research object. By using the Rigaku D / Max-2500PC powder X-ray diffractometer and the Renishaw in England Via Raman spectroscopy was used to analyze the crystal structure of the cryptographitic graphite. The change of the resistivity of samples with different degree of graphitization was investigated to explore the change trend of the relationship between the graphite crystallite structure and its conductivity. The results show that there is a positive correlation between the resistivity of graphite and the change of d002 at room temperature, but negatively correlated with the change of average crystallite size La. The increase of graphitization degree during the formation of coal-based graphites Is conducive to the formation of graphite conductive properties, and graphite increases the degree of disorder is not conducive to the formation of graphite conductive properties.