Study of Polycrystalline Iron Fibers/ Barium Titanate Nanocomposite Absorbing Materials

摘要

Polycrystalline iron fibers (PIF) had been prepared by using the pyrolysis of carbonyl by introducing magnetic field method. Surface modification of iron fibers was carried out using barium titanate. The diameter of polycrystalline iron fiber was from 3.5 μm to 8 μm, and the surface was modified by BaTiO_3 particle. The complex permeability and complex permittivity of iron fiber-epoxy resin composites had been measured in 8～18GHz frequency band. The results showed that iron fibers present magnetic loss at microwave frequency, and the permittivity of iron fibers was decreased after surface modification. In 8～18GHz frequency band, the reflectivity of composites materials was calculated and was in better agreement with the testing data.