FeOx Nanoparticle/Coal Gasification Fine Slag Hybrids for Electromagnetic Wave Absorbers
Source abstract
Abstract
Electromagnetic-wave (EMW) absorbers with strong reflection loss (RL) and a wide absorption frequency band under extremely thin thicknesses are highly desirable. Heterostructured multi-interface Fe3O4/FeO/Fe (FeOx) nanoparticle/coal gasification fine slag (CGFS) hybrids were successfully synthesized by coating highly graphitized CGFS with FeOx nanoparticles. The crystal structure, morphology, composition, magnetic performance, and electromagnetic (EM) parameters of FeOx/CGFS hybrids were tested using modern analysis and testing technology. Given their heterostructured multi-interface structural design, appropriate impedance matching, and synergy of dielectric and magnetic losses, the as-prepared FeOx/CGFS hybrids show adjustable and outstanding EMW absorption performances. The minimal RL (RLmin) of FeOx/CGFS hybrids is −61.6 dB at a thickness of 1.8 mm, and the widest effective absorption bandwidth (RL ≤ −10.0 dB) can cover 5.0 GHz (13.0–18.0 GHz) with a thickness of 1.7 mm. Furthermore, the results of the radar cross-section (RCS) simulation testify that FeOx/CGFS hybrids can effectively reduce EMW scattering in the X band by varying the thicknesses of the FeOx/CGFS hybrid coatings. These heterostructured multi-interface magnetic carbon-based EMW absorbers with high-performance EMW absorption and good reduction ability of the RCS can promote the resource utilization of CGFS.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Metamaterials and Metasurfaces Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China
University of Science and Technology of China, Hefei 230026, P. R. China
Anhui University of Science and Technology, Huainan 232001, P. R. China
State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia 750021, P. R. China
Funding
State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University · National Natural Science Foundation of China · Key Research Plan of Ningxia
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