Facile Fabrication of Bilayer Electromagnetic Wave Absorber via Hierarchical Mo2C/La0.6Sr0.4MnO3 Nanocomposite with Multi-Heterointerfaces for Efficient Low-Frequency Absorption

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 1.2mm, –39dB dissipation intensity, and 3GHz bandwidth at 5.4GHz frequency. This performance was obtained by manipulating the order and layer thickness of the components, as well as modifying their morphology and microstructure.