Electromagnetic wave absorption properties of the FeSiAl/PLA and FeSiAl-MoS2-Graphene/PLA double-layer absorber formed by fused deposition modeling

The FeSiAl/PLA and FeSiAl-MoS2-Graphene (GR)/PLA composite filaments were prepared through mechanical mixing and melt extrusion process, and the double-layer absorbers while the material of layer 1 is FeSiAl/PLA and the material of layer 2 is FeSiAl-MoS2-GR/PLA were prepared by fused deposition modeling (FDM) 3D printing technology. The results show that the FeSiAl/PLA and FeSiAl-MoS2-GR/PLA double-layer absorber can effectively improve impedance matching. The electromagnetic wave absorption performance is improved under the synergistic effect of multi-loss mechanisms. The minimum reflection loss (RLmin) value of the double-layer absorber is-52.50 dB at 17.76 GHz with the thickness of FeSiAl/PLA layer is 0.6 mm and the total thickness of 1.7 mm. The effective absorption bandwidth (EAB) of the double-layer absorber reaches 5.92 GHz (12.08 similar to 18 GHz) with the thickness of the two layers is 0.8 mm and 1.2 mm, respectively. It is 29.8 % wider than the EAB (4.56 GHz) of the single-layer FeSiAl-MoS2-GR/PLA composite with the same thickness.

Automated summary

The FeSiAl/PLA and FeSiAl-MoS2-GR/PLA composite filaments were prepared through mechanical mixing and melt extrusion process, and double-layer absorbers were prepared using FDM 3D printing technology. The results demonstrate that the double-layer absorber made of FeSiAl/PLA and FeSiAl-MoS2-GR/PLA can significantly improve impedance matching and enhance electromagnetic wave absorption performance. The double-layer absorber achieves a minimum reflection loss (RLmin) of -52.50 dB at 17.76 GHz, with a FeSiAl/PLA layer thickness of 0.6 mm and a total thickness of 1.7 mm. The effective absorption bandwidth (EAB) of the double-layer absorber is 5.92 GHz (12.08 to 18 GHz) with layer thicknesses of 0.8 mm and 1.2 mm, respectively. This is 29.8% wider than the EAB (4.56 GHz) of the single-layer FeSiAl-MoS2-GR/PLA composite with the same thickness.