Preparation of FeSiAl–Fe3O4 reinforced graphene/polylactic acid composites and their microwave absorption properties

Fabrication of Multifunctional Silylated GO/FeSiAl Epoxy Composites: A Heat Conducting Microwave Absorber for 5G Base Station Packaging

“…These peaks can be ascribed to the interfacial polarization resonance, indicating more GO-FeSiAl interface in the system as well as defects and functional groups on the surface of GO resulting in higher interfacial polarization. This contributes to higher microwave absorption at higher frequencies [39,40]. As the frequency rises, µ ′ shows a collectively decreasing trend (Figure 6c).…”

“…However, epoxy compounds with pure magnetic particles or a low GO amount show fairly narrow effective bandwidths, and strong absorption peaks only fall in a very low frequency band. As shown in Figure 7c for the GF-3 sample with 1% of GO, the maximum reflection loss increases to −48.29 dB at 1.6 GHz and the effective bandwidth increases to 3.8 GHz, which exhibits a wider bandwidth (3.8 GHz vs. 3.12 GHz [42] and 3.52 GHz [43]) and a higher refection loss (−48.29 dB vs. −47 dB [44], −44.47 dB [42] and −48.08 dB [39]) in the most recent relevant literature, using FeSiAl as a microwave absorber. This provides a perfect match for 5G station application, as the effective bandwidth just falls in the range of the 5G antennas' operating frequency band in the 2.575-2.645 GHz range [45], as shown in Figure 8.…”

Fabrication and investigation of graphene‐loaded triiron tetraoxide/silicone‐rubber electromagnetic shielding composites based on static magnetic‐field–induced orientation

“…Conductivity, dielectric properties, and mechanical properties are strongly influenced by the content of magnetite nanoparticles. However, the widespread application and promotion of single‐component Fe 3 O 4 composites are constrained by their susceptibility to agglomeration, 18 eddy currents, 19 high Fe 3 O 4 density, 1 and impedance mismatches 20 …”