Abstract
•Successfully synthesize of rod like Sr2FeReO6 and polygonal SnS2 powders.•The microwave dissipation performance in bilayer absorber tuned by tuning layer arrangement.•Flexible tuning of the impedance matching by varying the composition and layers thickness.•The synergistic effect of magnetic and dielectric losses was revealed.
Due to their special characteristics, bi-layer absorbers have drawn more attention in the field of microwave absorbers. These characteristics include synergistic effects between layers, the ability to tune absorption by adjusting layer arrangement, composition in each layer, and an improvement in interfacial polarization, which is the most effective feature for dissipating the incident wave. In this study-two distinct magnetic and magneto-dielectric components with SrFeReO6 and SrFeReO6/SnS2 composition were synthesized through solvothermal and polyol methods. The electromagnetic characteristics of paraffin base absorbers with varying filler loading percentages of SnS2 and SrFeReO6/SnS2 contents (20 and 40 wt%) were determined. These findings were used to design a bi-layer absorber with an optimum thickness and layer arrangement for achieving the wideband absorber with high absorption capability. Compared with the single layer absorber, the bi-layer absorber in which 40 wt% of SnS2 is placed at the top layer with 1 mm optimum thickness and 40 wt% of SrFeReO6/SnS2 is placed at the bottom layer with 1 mm thickness, the best absorption reaches −18 dB by covering almost the whole X-band frequency. The synergistic impact of tailoring the particle's shape, composition, and layer arrangement is what gives bi-layer absorbers their exceptional microwave dissipation performance as compared to single layer one. The findings demonstrated the potential of the designed bi-layer absorber in X-band frequency as an absorber with excellent performance and broad bandwidth capability.