Improved microwave absorption performance with negative permittivity of polyaniline in the Ku-band region

Sutar, R.B.; Kulkarni, Gopal; Jamadar, A.S.; Kandesar, Priyanka; Puri, Vijaya; Yadav, J.B.

doi:10.1016/j.cjph.2021.10.036

Cited by 4 publications

(1 citation statement)

References 52 publications

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“…Therefore, no obvious resonance peaks were observed in T04 with higher Ti contents. For all three samples, the values of ε″ were negative in the high-frequency range (14–18 GHz), which might stem from that the conductive path was formed in HEA/paraffin samples. , The complex permeability decreased as the frequency increased in the range 1–18 GHz (Figure d,e). In detail, the imaginary part of permeability varied in ranges of 1.00–0.13 (T00), 0.80–0.21 (T02), and 0.66–0.07 (T04).…”

Section: Results and Discussionmentioning

confidence: 88%

Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTi_x High-Entropy Alloys

Yang

Liu

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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Efficient and stable electromagnetic-wave (EMW) absorption materials have attracted great attention in the field of reducing microwave pollution. Herein, FeCoNiCuTi x high-entropy alloys (HEAs) as electromagneticwave absorbing materials were prepared by a high-energy ball-milling method. The as-milled HEA powders presented a flaky shape with a high aspect ratio. Impedance matching was efficiently optimized by severe lattice distortion, which was caused by Ti incorporation. The introduced plentiful defects in FeCoNiCuTi x HEAs provided abundant polarization sites for dielectric loss. By tuning Ti contents, FeCoNiCuTi 0.2 HEAs delivered excellent EMW absorption performances. The maximal reflection loss (RL max ) values reached −47.8 dB at 10.86 GHz as thin as 2.16 mm, and the widest bandwidth was 4.76 . Furthermore, the introduction of Ti enhanced corrosion resistance via increasing the charge transfer resistance of a passivated film. Those characteristics of FeCoNiCuTi x HEAs made these materials a practical gigahertz-range EMW absorber. Additionally, our findings provided a facile and tunable strategy for designing EMW absorbing materials, which was aimed at lightweight, highly efficient absorption, and resistance to harsh environments.

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Section: Results and Discussionmentioning

confidence: 88%

Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTi_x High-Entropy Alloys

Yang

Liu

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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Progress in percolative composites with negative permittivity for applications in electromagnetic interference shielding and capacitors

Leng,

Yang,

Tang

et al. 2023

Adv Compos Hybrid Mater

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Tunable negative permittivity performance of carbon/silicon dioxide ceramic metacomposites under external DC bias voltage

Wang,

Cheng,

Liu

et al. 2024

Ceramics International

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Improved microwave absorption performance with negative permittivity of polyaniline in the Ku-band region

Cited by 4 publications

References 52 publications

Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTi_x High-Entropy Alloys

Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTi_x High-Entropy Alloys

Progress in percolative composites with negative permittivity for applications in electromagnetic interference shielding and capacitors

Tunable negative permittivity performance of carbon/silicon dioxide ceramic metacomposites under external DC bias voltage

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Improved microwave absorption performance with negative permittivity of polyaniline in the Ku-band region

Cited by 4 publications

References 52 publications

Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTix High-Entropy Alloys

Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTix High-Entropy Alloys

Progress in percolative composites with negative permittivity for applications in electromagnetic interference shielding and capacitors

Tunable negative permittivity performance of carbon/silicon dioxide ceramic metacomposites under external DC bias voltage

Contact Info

Product

Resources

About

Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTi_x High-Entropy Alloys

Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTi_x High-Entropy Alloys