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Novel three-dimensional TiO2-Fe3O4@polypyrrole composites with tunable microwave absorption in the 2–40 GHz frequency range
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 TiO 2 -Fe 3 O 4 @Polypyrrole (T-F-P) composites with...
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Published in: | Journal of materials science 2020-11, Vol.55 (32), p.15493-15509 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | 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 TiO
2
-Fe
3
O
4
@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 (RL
min
) 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. |
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ISSN: | 0022-2461 1573-4803 |
DOI: | 10.1007/s10853-020-05114-3 |