首页|Excellent microwave absorption performance of PAN-based Fe/C nanofibers with low loading fillers
Excellent microwave absorption performance of PAN-based Fe/C nanofibers with low loading fillers
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NSTL
Elsevier
Carbon/magnetic metal composites have attracted great interest in the microwave absorption field. Here, polyacrylonitrile (PAN)-based Fe/C nanofibers were fabricated through electrospinning in combination with high-temperature carbonization, which was used as difunctional dielectric and magnetic microwave absorbing materials. The Fe/C nanofibers fabricated were characterized by a high aspect ratio, and magnetic Fe nano -particles had uniform distribution within dielectric carbon fibers. The Fe/C nanofibers had prominent perfor-mance in absorbing microwave because of favorable impedance matching condition, improved capability in attenuating microwave and synergistic influence between dielectric loss of PAN-based carbon materials and magnetic loss of Fe, which was correlated with the carbonization temperature as well as Fe content. The optical Fe content of 5 wt%, carbonization temperature of 1200 celcius, Fe/C/paraffin composites containing 10 wt% fillers had high performance in absorbing microwave, the reflection loss reaching the maximum of |RLmax| = 40.47 dB at 9.36 GHz at 2.5 mm matching thickness, as well as the effective bandwidth (EAB) of 4.64 GHz (13.36-18 GHz), covering 12.88-16.88 GHz at 1.6 mm thin thickness, which nanofibers were easy to obtain and were characterized by strong performance in absorbing microwave, thin thickness and light weight. Thus, the fabri-cated nanofibers can be recognized as a promising microwave absorber.
NSTL
Elsevier
