石墨化对微螺旋炭纤维形貌和微观结构的影响  

Effect of Graphitization on the Morphologies and Microstructures of Micro-coiled Carbon Fibers

作　　者：毕辉[1] 寇开昌[1] 王召娣[1] 王志超[1] 张教强[1] 

机构地区：[1]西北工业大学理学院应用化学系,西安710072

出　　处：《无机材料学报》2008年第2期398-402,共5页Journal of Inorganic Materials

基　　金：陕西省自然科学基金(N6CS0005)

摘　　要：采用化学气相沉积法制备微螺旋炭纤维,在氩气气氛,2500℃下对其进行石墨化处理.通过扫描电镜,激光拉曼光谱和X射线晶体衍射对石墨化前后微螺旋炭纤维的形貌与微观结构进行了研究,并初步探讨了石墨化机理.结果表明:石墨化处理对微螺旋炭纤维具有显著的纯化作用,其螺旋形貌基本保持不变.微观结构更加规整,微螺旋炭纤维的晶面层间距d_(002)(0.3626～0.3378nm)减小,晶粒尺寸L_c(1.6404～3.8590nm)和L_a(2.04～7.21nm)增大,石墨化程度增强.Micro-coiled carbon fibers were prepared by a catalytic chemical vapor deposition method, and treated in an argon atmosphere at 2500℃. Scanning electron microscope （SEM）, Raman spectroscope and X-ray diffraction （XRD） were performed to characterize morphologies and microstructures of the non-graphitizated and graphitizated micro-coiled carbon fibers, and graphitization mechanism was discussed preliminarily. The results reveal that micro-coiled carbon fibers are purified prominently, morphologies of micro-coiled carbon fibers is similiar to the original fibers, and microstructures of microcoiled carbon fibers are more regular after the graphitization treatment. The interlayer spacing d002 （0.3626-0.3378nm） decreases, graphitization degree, Lc, mean size of crystal in the c-direction（1.6404- 3.8590nm） and La, mean size of crystal in the a-direction（2.04-7.21nm） increase.

关 键 词：微螺旋炭纤维 石墨化 形貌 微观结构 

分 类 号：TQ342[化学工程—化纤工业]