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

In this paper, ZnFe2O4-coated FeSiCr ([email protected]2O4) 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 [email protected]2O4 nanocomposites is calculated to be −44.2 dB at 15.9 GHz (d = 1.5 mm), and the effective bandwidth (<−10 dB) is between 12.2 and 18 GHz. Economical and abundant raw materials, simple synthesis method, thin coating thickness and strong microwave absorption ability make the [email protected]2O4 nanocomposite attractive candidate as microwave absorbing materials.