Electromagnetic wave absorption properties of Fe3C/carbon nanocomposites prepared by a CVD method

Dendrite-shaped iron nanowires with 50-200 nm in diameter and 10-20 μm in length were prepared by the CVD method from Fe(CO)₅ as a starting source. Ethanol was cracked on the surface of the resultant iron nanowires to form the Fe₃C/carbon nanocomposites, in which nanosized carbon beads covered the surface of Fe₃C. Resin compact of the resultant Fe₃C/carbon nanocomposites had excellent electromagnetic wave absorption ability in the range of 0.9-9.0 GHz, and such available absorption range more enhanced compared to that observed on the resin compact prepared from the original iron nanowires by the hybridization of magnetic (Fe₃C) and dielectric (carbon) materials.