Design of Bi-Layered Strong Microwave Absorber Based on Polymer-Fly Ash Cenosphere Composite With A Data-Driven Approach

In this work, a strong microwave absorption characteristic viz., minimum reflection loss (RL) -69.5 dB (8.2-12.4 GHz absorption bandwidth i.e., RL< -10 dB) is evaluated for the bi-layered polyvinyl butyral (PVB)-polyaniline (PANI) coated fly ash cenosphere (FAC) composite. Materials data-driven approach is used to model and optimize the associated parameters (based on an experimental evaluation), and hence to realize the best RL. The outstanding RL performance is achieved for the 10 wt% PANI-FAC loaded PVB (top layer, thickness 1.5 mm) and 6 wt% PANI-FAC loaded PVB (a bottom layer, thickness 2 mm).