Design and Fabrication of Flexible double layer Magneto-dielectric nanocomposite for electromagnetic and infrared wave stealth application.

There is an urgent need for multifunctional materials that possess high absorption and infrared stealth capabilities to address the increasingly complex and severe electromagnetic pollution. This research explores how the microstructure of components and the design of the absorber impact the stealth performance of electromagnetic and infrared waves. This research involved designing and fabricating a bi-layer sample with a hierarchical structure consisting of FeCoNi magnetic particles as the absorbing layer and Cu 2 O micro-cube/ h -BN nanocomposite as the matching layer. The particular design of the absorber was instrumental in intensifying the synergistic relationship between dielectric and magnetic loss, thereby achieving a superior level of impedance matching and absorption efficacy. The optimized microwave absorption performance was achieved by tuning thickness and arrangement of each layer. It shows that the minimum reflection loss for bilayer sample reaches −38 dB with a total thickness of only 1.2 mm, and effective absorption bandwidth of 4.4 GHz which covers 75 % of the entire ku frequency band. Its excellent electromagnetic and infrared wave stealth performance may be attributed to enhanced heterogeneous interfaces and consequently polarization relaxation along with magnetic loss, which result from multi-component synergy and the unique 3D hierarchical microstructure and interconnection between particles. [ABSTRACT FROM AUTHOR]