Investigations of physicochemical and microwave absorption performance of NiCo₂S₄/AgBr nanocomposite in X-band frequency

The advantages of the microwave materials' low weight and exceptional absorbing power are crucial for addressing the EM problems in stealth technology. The structure and absorber thickness optimization is suggested by the current work. Herein, we increased the absorption properties of the NiCo2S4/AgBr (NCAG) nanocomposite by modifying the filler loading in the composite matrix. XRD, VSM, Raman, and FESEM were employed to find the structural and morphological properties of the NCAG composites. At 9.7 GHz, the thinnest layer of 1.4 mm was reported to have a -24 dB minimum reflection loss. The improved absorption bandwidth, however, is 3.8 GHz. The H-plane radiation patterns of an NCAG sample with a 25 wt.% filler loading were determined using the free-space approach (thickness of 1.4 mm). The RL resonance peaks at 10.9 GHz and 11.4 GHz demonstrate the 25 wt% and 35 wt% samples' strong high-frequency absorption responses. The key factors in the improvement of the reflection loss and absorption efficiency were excellent conductive response, better matching properties, and electromagnetic losses.