气相生长螺旋状碳纤维催化模型的研究

基于气相生长螺旋状碳纤维早期成长先端形态，运用质量传递过程的扩散理论，提出催化剂在螺旋状碳纤维生长过程中的作用机制。建立相关模型。该模型可以成功地解释随反应时间的延长，碳纤维截面变扁的现象以及该纤维的截面微观构造；并指出制约生长速率，微观尺寸形态的关键因素为催化剂的组成及颗粒尺寸，温度和碳氢化合物的流量。

Research on Catalysis Model for Vapor Grown Helical Carbon Fiber

Based on the growth-tip morphology in early vapor grown carbon fiber' growth,by using the diffusion theory for mass transfer process,we set up correlative models to explain the mechanism of catalysis.These models explain the phenomenon that the cross section of helical carbon fiber becomes tabular as the growth time increases,and also explain the carbon fiber cross section's microstructure.The result indicates that the key factors that control the growing rate,microscopic dimensions and morphologies are constitutes and grain size of catalysts,temperature and hydrocarbon's flow rate-