Mechanical and electromagnetic wave dissipation features of bilayer absorber filled with hierarchical porous CoNi magnetic alloy and BiVO4/ VOOH nanocomposite

Designing absorbers with efficient critical parameters is required to address the problems caused by electromagnetic pollution. In this context, this study focuses on the chemical synthesis of hierarchical mesoporous microspheres CoNi magnetic alloy particles, and BiVO4/VOOH nanocomposite as a source of dielectric dissipation for constructing bilayer absorbers that are optimized in their absorption properties using MATLAB simulation. Single layer and constructed bilayer absorber sample's mechanical and X band microwave absorption performance were investigated, compared, and optimized. It is found that the prepared bilayer absorber sample's mechanical characteristics are comparable to those of the two bulk single-layer samples of CN and BVH, indicating that the interface in the double-layer sample not only has little to no effect on the majority of BVH or CN samples but also enhances the dissipation feature. Bilayer absorber sample with reasonable design and layer thickness optimization outperform single layer samples in terms of absorption efficiency, with the ideal sample having a minimum reflection loss (RLmini) of -37.5 dB and an effective absorption bandwidth (EAB) of 3.6 GHz with only a total thickness of 1.6 mm. The exceptional microwave absorption capabilities of the bilayer absorber sample are the consequence of the beneficial impacts of interfacial polarization between layers.