In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption
Source abstract
Abstract
Carbon materials have aroused extensive interests for their remarkable electrical properties as electromagnetic wave (EMW) absorption. However, the synthesis of the wide-band electromagnetic wave absorbent is an insuperable challenge for attaining effective refection loss and electromagnetic matching. Herein, a facile method for large-scale synthesis of monodispersed Fe/Fe3O4/C composite microspheres is proposed. The carbon microspheres (1–2 µm in diameter) imbedded with nanosized Fe/Fe3O4 particles (10–20 nm) are uniformly produced by polymerization and carbothermic reduction processes. The products exhibit the minimum refection loss −45.5 dB at 9.4 GHz and a broad bandwidth of 4.1 GHz below −10 dB from 7.8 GHz to 11.9 GHz with a thickness of 3.0 mm. The absorption mechanism indicates a unique deviated Debye dipolar relaxation effect in the absorbing bandwidth.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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