| 摘要 |
The present invention relates to a method for preparing high-density carbon nanotubes without soot by a chemical vapor deposition process using stainless steel foil coated with manganese ferrite. Particularly, the method uses manganese ferrite coated on a stainless steel substrate as a catalyst and carries out chemical vapor deposition under inert atmosphere while introducing a carbon source gas to obtain high-density carbon nanotubes with little generation of carbonaceous byproducts other than carbon nanotubes. According to the present invention, it is possible to obtain carbon nanotubes with little soot, i.e., carbon byproducts. Thus, it is possible to significantly reduce generation of undesired foreign materials as compared to the existing methods for preparing carbon nanotubes. The method according to the present invention requires no additional purification process for providing high-purity carbon nanotubes, thereby reducing costs, human labor and time through the simplification of the process. It is expected that the carbon nanotubes obtained by the method according to the present invention shows excellent performance in the precision engineering field requiring high purity. |
