title: A carbonyl iron/carbon fiber material for electromagnetic wave absorption.
abstract: A carbonyl iron/carbon fiber material consisting of carbon fibers grown on micrometer-sized carbonyl iron sphere, was synthesized by chemical vapor deposition using a mixture of C2H2 and H2. The hollow-core carbon fibers (outer diameter: 140 nm and inner diameter: 40 nm) were composed of well-ordered graphene layers which were almost parallel to the long axis of the fibers. A composite (2 mm thick) consisting of the carbonyl iron/carbon fibers and epoxy resin demonstrated excellent electromagnetic (EM) wave absorption. Minimum reflection losses of -36 dB (99.95% of EM wave absorption) at 7.6 GHz and -32 dB (99.92% of EM wave absorption) at 34.1 GHz were achieved. The well-dispersed and network-like carbon fibers in the resin matrix affected the dielectric loss of the EM wave while the carbonyl iron affected the magnetic loss.
authors: Department of Information Technology, Hsing Wu College, Taipei County, 244 Taiwan, ROC.
authors: Meng-Jey
authors: MJ
authors: Youh
authors: Hung-Chih
authors: HC
authors: Wu
authors: Wang-Hua
authors: WH
authors: Lin
authors: Sheng-Cheng
authors: SC
authors: Chiu
authors: Chien-Fa
authors: CF
authors: Huang
authors: Hsin-Chih
authors: HC
authors: Yu
authors: Jen-Sung
authors: JS
authors: Hsu
authors: Yuan-Yao
authors: YY
authors: Li
mesh_terms: D000042:Absorption; D003460:Crystallization / Q000379:methods; D004574:Electromagnetic Fields; D007501:Iron / Q000737:chemistry*; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012031:Refractometry; D012542:Scattering, Radiation
chemical_list: D037742:Nanotubes, Carbon; D007501:Iron