Preparation and Properties of Magnetic Carbon Fiber Composite Wave-Absorbing Materials Modified by Carbon/Magnetic Heterogeneous Coating

Abstract

In order to improve the wave-absorbing property of carbon fiber composite, a kind of magnetic carbon fiber/epoxy resin composite wave-absorbing material modified by carbon/magnetic heterogeneous coating was prepared.The surface morphology of magnetic carbon fiber was observed by scanning electron microscope, and its electromagnetic parameters, wave impedance, loss factor and wave-absorbing property were characterized. The results show that the carbon/magnetic heterogeneous coating constructed on the surface of carbon fiber with stable structure. The real part and imaginary part of the complex permittivity of magnetic carbon fiber is 2.19-22.32 and 4.2-32.3, respectively.The real part and imaginary part of the complex permeability is 0.98-1.15 and 0.39-0.44, respectively. The wave impedance is 83.6-260.7 Ω, and the loss factors of electric and magnetic is 1.17-2.05 and 0.34-0.43, respectively.The minimum reflection loss is-23.1 dB, and the effective bandwidth is 4.14 GHz.

Keywords

• carbon fiber
• magnetic particles
• wave absorption