论文部分内容阅读
用铁做催化剂,乙炔做原料气体,在碳纤维表面上长出二级增强相——碳晶须初步考察了生长温度、铁盐溶液浓度对碳晶须生长的影响结果表明,碳晶须生长的最佳温度在1000℃左右,在催化剂溶液浓度适当时,碳晶须均匀分布在母体纤维上,并把相邻的碳纤维连结起来;温度过高或催化剂溶液浓度过高,都会在碳纤维表面上形成大块碳沉积团碳晶须的生长是气相中的碳原子溶解于纤维表面上的催化剂液滴后,在液滴底部的碳纤维表面上析出固体碳的动态过程
The effect of growth temperature and concentration of iron salt solution on the growth of carbon whiskers was investigated by using iron as catalyst and acetylene as raw material gas to grow secondary enhanced phase - carbon whiskers on the surface of carbon fibers. The results show that the growth of carbon whiskers The optimum temperature is about 1000 ℃. When the concentration of catalyst solution is appropriate, the carbon whiskers should be evenly distributed on the parent fiber and the adjacent carbon fibers should be connected. When the temperature is too high or the concentration of the catalyst solution is too high, carbon whiskers will form on the surface of the carbon fiber The growth of large carbon-deposited carbon whiskers is the dynamic process of precipitating solid carbon on the surface of the carbon fibers at the bottom of the droplets after the carbon atoms in the gas phase have dissolved in the catalyst droplets on the surface of the fibers