纳米碳化硅催化生长碳纤维及生长机理分析  

Growth Mechanism of Carbon Fibers Catalyzed by SiC Nanoparticles

作　　者：常琛[1] 郝春成[1,2] 

机构地区：[1]青岛科技大学材料学院,青岛266042 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《人工晶体学报》2014年第7期1713-1717,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51077075);电力设备电气绝缘国家重点实验室资助项目(EIPE10207)

摘　　要：通过氢电弧法,制备了碳化硅纳米粒子,并以碳化硅纳米粒子为催化剂,乙炔为碳源,在管式炉中利用化学气相沉积(CVD)法制备了纳米碳纤维(CNFs)。利用X射线衍射谱仪(XRD),扫描电子显微镜(SEM),高分辨透射电子显微镜(HRTEM),对碳化硅和碳纤维进行了形貌及结构分析,结果表明,得到的碳化硅为结晶良好的面心立方的β-SiC晶体,以此为催化剂得到的碳纤维以碳化硅粒子为中心对称生长,直径与碳化硅粒子直径大致相当,当催化剂为单晶时产物多为螺旋型纳米碳纤维,而当催化剂颗粒为多晶时,得到的多为直线型碳纤维。The carbon nanofibers（CNFs） were obtained by chemical vapor deposited method in a tubular furnace,using SiC nanoparticles prepared by hydrogen arc plasma method as catalyst and acetylene as carbon source. The SiC nanoparticles and CNFs were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,and transmission electron microscope（TEM）. The result shows that the SiC nanoparticles were FCCβ-SiC（3C-SiC） crystal; the CNFs were symmetrically grown with the catalyst particles as the center; the diameter of the CNFs were roughly similar to the diameter of the SiC nanoparticles; the CNFs were helical when the catalyst particles were single crystal,and were lineary when the catalyst particles were polycrystal.

关 键 词：碳化硅 碳纤维 氢电弧法 化学气相沉积 

分 类 号：TB32[一般工业技术—材料科学与工程]