Abstract
Bi-layer absorbers, which include porous and hierarchical materials, benefit from their slight weight, garnering increased interest in electromagnetic wave dissipation adaptability. However, developing a simple manufacturing process and utilizing such unique structures with particular compounds to achieve rational electromagnetic wave dissipation performance remains a challenge. In this case, a novel hierarchical flower-like Mo2C particle and scraps' firewood-shaped La0.6Sr0.4MnO3 were chemically synthesized and employed as the single component in each layer of a manufactured double-layer absorber. The mechanical and electromagnetic wave dissipation capability of optimized bilayer absorber samples was excellent. The best absorption was found in bilayer samples with a total thickness of just 1.2 mm, –39 dB dissipation intensity, and 3 GHz bandwidth at 5.4 GHz frequency. This performance was obtained by manipulating the order and layer thickness of the components, as well as modifying their morphology and microstructure.
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