Novel three-dimensional TiO2-Fe3O4@polypyrrole composites with tunable microwave absorption in the 2–40 GHz frequency range
Source abstract
Abstract
Enormous research effort is currently being directed toward the development of low-cost electromagnetic wave absorbing (EMWA) materials that operate at microwave frequencies. Herein, we report the successful fabrication of novel three-dimensional TiO2-Fe3O4@Polypyrrole (T-F-P) composites with excellent microwave absorption properties between 2 and 40 GHz. By varying the thickness of the T-F-P absorber from 1.5 to 2.5 mm, an effective absorption bandwidth (EAB, reflection loss (RL) ≤ − 10 dB) of 28.12 GHz (11.88–40 GHz) was realized. At a thickness of 2.5 mm, the minimum reflection loss (RLmin) was − 37.49 dB (13.84 GHz) in the frequency range 2–18 GHz; − 41.30 dB (25.30 GHz) in the frequency range 18–26.5 GHz and − 42.65 dB (34.1 GHz) in the frequency range 26.5–40 GHz. Multiple reflections, interfacial polarization, conductive losses and magnetic losses all contribute to the excellent EMWA properties of the T-F-P composites.
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.
References (52)
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