Development of an efficient bi-layer absorber based on WSe2 and LaCoO3 nanopowders for X-band frequency: Computational and experimental validation

Abstract

Herein, monolayer and bilayer absorbers were designed to investigate the microwave absorption characteristics of LaCoO3 and WSe2 nanomaterials. WSe2 monolayer sample showed better absorption capabilities as compared to LaCoO3 single-layer sample. The microwave absorption effectiveness of bilayer absorbents was scrutinized using a simulation approach. The simulation results demonstrated that a bilayer absorber composed of LaCoO3 as the bottom layer (0.5 mm thickness) and WSe2 on the top layer (1.5 mm thickness) can obtain a minimum reflection loss (RLmini) of −42.5 dB with an effective absorption bandwidth (EAB) of 2.8 GHz (12.4 GHz–9.6 GHz) at 10.8 GHz. Simulation predictions and experimental findings were juxtaposed; which accord with one another quite well. The findings demonstrate that the exceptional microwave absorption performance of the bilayer absorber may be attributed to its layered architecture. Our study presents a simple synthetic method and new perspectives on engineering a bilayer absorber with simulation and experimental justification.