FeSiCr@ZnFe2O4 core-shell nanostructure and properties enhancement on microwave absorption

Abstract In this paper, ZnFe2O4-coated FeSiCr (FeSiCr@ZnFe2O4) nanocomposites were fabricated by plasma arc discharging and hydrothermal methods. The polarization strength of composite materials is weakened and the complex permittivity and conductivity are reduced by ZnFe2O4 coating on the FeSiCr surface. The impedance matching of the microwave absorbing materials is optimized. The reflection loss of FeSiCr@ZnFe2O4 nanocomposites is calculated to be -44.2 dB at 15.9 GHz (d = 1.5 mm), and the effective bandwidth (