Enhancing electromagnetic wave absorption performance through construction of three-dimensional multilayered SiCw/Y3Si2C2/Ni0.5Zn0.5Fe2O4 composites

Abstract

In this study, three-dimensional (3D) multilayer electromagnetic wave absorbing (EMWA) materials SiCw/Y3Si2C2/Ni0.5Zn0.5Fe2O4 were fabricated for the first time. A two-dimensional (2D) Y3Si2C2 coating was synthesized onto the one-dimensional (1D) SiCw surface by the molten salt method. Subsequently, one layer of zero-dimensional (0D) Ni0.5Zn0.5Fe2O4 nanoparticles was deposited onto the Y3Si2C2 coating surface via hydrothermal reaction. The microstructure and electromagnetic wave absorption mechanism of SiCw/Y3Si2C2/Ni0.5Zn0.5Fe2O4 were systematically investigated. The introduction of 2D Y3Si2C2 and 0D Ni0.5Zn0.5Fe2O4 enhanced impedance matching and provided abundant heterogeneous interfaces, thus leading to interface polarization loss. Owing to the promoted impedance matching and superb attenuation capacity, 3D multilayered SiCw/Y3Si2C2/Ni0.5Zn0.5Fe2O4 composites exhibit superior EMWA performance in comparison with origin SiCw. For the SiCw/Y3Si2C2/Ni0.5Zn0.5Fe2O4 composites, their minimum reflection loss (RLmin) can be achieved −43.95 dB and the effective absorption bandwidth (EAB) is 4.08 GHz when the thickness is 2.12 mm. This study could pave a reference for the investigation of multi-dimensional hybrid structure EMWA material.