Synthesis, magnetic and electromagnetic properties of Al2O3/Fe oxides composite-coated polyhedral Fe core–shell nanoparticles
Source abstract
Abstract
Abstract Polyhedral Fe nanoparticles with amorphous Al 2 O 3 /FeO x composites shells are prepared by the arc discharge method, in which the shape of Fe nanoparticles includes quadrilateral, pentagon, hexagonal and sphere. Magnetic and electromagnetic (EM) properties of Fe nanoparticles have been investigated in detail. Reflection loss (RL) values exceeding −10 dB are calculated in 7–18 GHz for an absorber thickness of 1.6 mm, and RL values exceed −5 dB at 2–18 GHz for any absorber thickness between 3.8 and 10 mm. An optimal RL value of −38.46 dB is observed at 6.2 GHz with a matching thickness of 2.3 mm. The excellent EM properties are ascribed to the dielectric resonance from the special core–shell microstructure and the broad and strong natural resonance from the shape anisotropy of Fe nanoparticles.
Source: openaire · Quality: candidate unverified · Source record ↗
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.
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