FeCl_3膨胀石墨层间化合物制备及电导性能研究  

Synthesis and electrical conductivity of FeCl_3 exfoliated graphite intercalation compounds

作　　者：曹宏[1] 马恩宝[1] 王学华[1] 宾晓蓓[2] 李阳艳 

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430074 [2]武汉理工大学资源与环境工程学院,湖北武汉430070 [3]中国材料科工进出口有限公司,北京100037

出　　处：《岩石矿物学杂志》2005年第6期629-632,共4页Acta Petrologica et Mineralogica

基　　金：湖北省教育厅优秀中青年项目(2003B001);湖北省自然科学基金项目(2004ABA090)

摘　　要：在N2保护下用熔盐法合成了FeCl_3膨胀石墨层间化合物(简称FeCl_3-EGICs)。研究表明,在FeCl3过量、360℃、12h的条件下可得到纯一阶产物;460℃、12h为纯二阶。293K时,一阶FeCl3_EGICs的电导率为7.513×106S·m-1,二阶为6.87×106S·m-1,分别是原料膨胀石墨的3.7倍和3.4倍。在293K至分解温度范围内,FeCl3_EGICs具有金属电导特性,其电阻与温度间呈线性关系,随温度升高电阻增大,其机理为声子散射。The FeCl3 graphite intercalation compounds （FeCl3-GICs） have aroused special attention for their highly electrical conductivity and stability. In this paper, FeCl3-exfoliated graphite intercalation compounds （Abs. FeCl3-EGICs） have been synthesized under the protection of nitrogen gas with the melting salt method. The experimental results show that pure stage-Ⅰ FeCl3-EGICs can be synthesized at 36012 for 12 hours, and pure stage-Ⅱ FeCls3-EGICs at 46012 for 12 hours when FeCl3 is excessive. In addition, the electrical conductivity of FeCl3-EGICs was measured at different temperatures, the number of stage I EGICs is 7. 513× 106S· m^-1 at 297K which is 3.7 times larger than pristine exfoliated graphite, and stage Ⅱ is 6.87×106 S· m^-1 at the same temperature which is 3.4 times larger. The conductance of FeCl3-EGICs is similar to that of metals, and its electrical resistivity shows a linear relation with the temperature from 297K to decomposition temperature. The resistivity increases with temperature, with the mechanism being phonon scattering.

关 键 词：膨胀石墨 层间化合物 FECL3 电导 

分 类 号：P578.16[天文地球—矿物学] O44[天文地球—地质学]