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以苯为碳源、二茂铁为催化剂在竖式炉中用流动法制备出外径为40~80nm,内径20~40nm,长度50~500μm的碳纳米管;并在1800,2500,2800,2900℃温度下分别对其进行高温石墨化处理.X射线衍射(XRD)分析结果显示,随着温度的增加,碳纳米管的微晶层间距减小,片层结构趋向规整,同时石墨微晶沿a轴和c轴长大,有效改善了碳纳米管的微观结构.碳纳米管里层的乱层结构石墨化所需能量由热能提供,整个过程包括非碳原子的排除、多核芳环平面组织结构化、微晶重排、微晶合并与长大;外层的无定型碳主要靠铁的催化作用实现石墨化.

参考文献

[1] Saito R;Dresselhaus M S;Dresselhaus G .Physical properties of carbon nanotubes[J].Imperial College Press,1998,67(05):35-46.
[2] Sen R.;Rao CNR.;Govindaraj A. .CARBON NANOTUBES BY THE METALLOCENE ROUTE[J].Chemical Physics Letters,1997(3-4):276-280.
[3] Thomas E Muller;Douglas G et al.Synthesis of nanotubes via catalytic pyrolysis of acetylene:a SEM study[J].CARBON,1997,35:953-960.
[4] Yamamoto K;Koga Y;Fujiwara S et al.New method of carbon nanotube growth by ion-beam irradiation[J].Applied Physics Letters,1996,69(27):4174-4182.
[5] 钱崇梁,周桂芝,黄启忠.XRD测定炭素材料的石墨化度[J].中南工业大学学报(自然科学版),2001(03):285-288.
[6] Asao Oya;Sugio Otani .Influences of particle size of metal on catalytic graphitization of non-graphitizing carbons[J].CARBON,1981(19):391-402.
[7] Asao Oya;Sugio Otani.catalytic graphitization of carbons by various metals[J].carbon,1979(17):131-137.
[8] Yudasaka M;Ki Kuchi R.Graphitization of carbonaceous materials by Ni, Co and Fe[A].Springer,1998:99-105.
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