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- Title
Preparation and high electromagnetic shielding effectiveness of Cu/FeSiBCuNb/Cu sandwich structural composites.
- Authors
Qi, Jingtao; Xu, Wenjie; Zhang, Yuyang; Fu, Peixin; Shi, Ruichen; Yang, Yuanzheng
- Abstract
The sandwich structure of Cu/FeSiBCuNb/Cu composites was prepared by depositing Cu films on the surface of FeSiBCuNb amorphous alloy strips by magnetron sputtering. In different communication systems, the frequency of electromagnetic waves needs to be diverse to meet specific needs. The combination of iron-based amorphous alloy strips with high magnetic permeability for low frequencies and Cu with high electrical conductivity for high frequencies allows for greater flexibility in handling electromagnetic radiation at different frequencies. As the thickness of Cu films increases, the conductivity of composites increases. The conductivity of composites with Cu films thicknesses of 320 nm, 566 and 934 nm is 1.56 × 106 S/m, 1.62 × 106 S/m and 1.65 × 106 S/m, respectively. The best electromagnetic shielding effectiveness of sandwich composites with Cu films thicknesses of 320 nm, 566 and 934 nm is − 100.3 dB at 7.3 GHz, − 104.1 dB at 6.8 GHz and − 92.0 dB at 7.2 GHz, respectively. The composite with 566 nm Cu films after relaxation annealing is 1.52 × 106 S/m. Composite also has the best electromagnetic shielding efficiency of − 102.4dB at 7.2 GHz. Compared to double-layer FeSiBCuNb/Cu composites, the conductivity of the sandwich Cu/FeSiBCuNb/Cu composites has not changed obviously before and after relaxation annealing, which will make them suitable for more commercial applications.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 1, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-11717-8