中文摘要：

通过X射线荧光光谱仪、X射线衍射仪、场发射扫描电子显微镜、激光拉曼光谱仪、Zeta电位分析仪等表征手段,对湖南郴州不同矿区微晶石墨样品的成分、结构及物理性质进行研究。结果表明：微晶石墨样品由石墨和少量的绿泥石、石英、方解石、白云母组成,主要的化学元素为C,O,Si,Al,Fe,Ca等;微晶石墨颗粒多为细小的片状石墨集合体,固定碳含量为77.40%-86.39%;晶体结构均以2H型为主,同时含有14.99%-21.63%的3R型结构,石墨化度为0.59-0.80,与晶质石墨的晶体结构存在一定差距;微晶石墨表面在pH为5-13的水溶液中荷负电,当pH=12时,带电量最大,此时石墨颗粒在水溶液中有较好的稳定性,亲水性较强;微晶石墨样品的电阻率为17.7mΩ·cm-37.2mΩ·cm,并随石墨结构无序度R的增加而增大。本研究结果为该地区微晶石墨的开发与利用提供了重要参考依据。

英文摘要：

The composition, structure,and physical properties of microcrystalline graphite from different mining area in Chenzhou, Hunan Province studied by XRF,XRD, FESEM-EDS, Raman, and Zeta potential analysis. It shows that the mineral components of microcrystalline graphite samples are primarily graphite with small amounts of chlorite,quartz, calcite and muscovite, and its main chemical elements are C, O, Si, A1, Fe, Ca, Mg etc. Most of the graphite particles consist of fine graphite flakes with fixed carbon content of 77.40%-86.39%. It shows that the graphite samples are mainly of 2H-graphite, and the content of 3R-graphite ranges from 14.99% to 21.63%. The graphitization degree of graphite samples is 0.59-0. 80,which has a certain gap compared with the crystal structure of crystalline graphite. The surface of microcrystalline graph- ite is charged by negative in water when pH at 5-13 and the value of negative charge reaches to maximum at pH= 12. Under that condition, graphite particles have better stability and stronger hydrophilicity in aqueous solution. The resistivity of microcrystalline graphite is 17.7mΩ·cm-37.2mΩ·cm and increases with the disorder structure （R）. Above research results provide significant references for development and utilization of microcrystalline graphite in the area.