Enhanced broadband microwave absorption of Fe/C core-shell nanofibers in X and Ku bands

Dong, Shixiang; Li, Jing; Li, Ning; Zhang, Shuai; Li, Bo; Zhang, Qianli; Ge, Liqin

doi:10.1016/j.ceramint.2022.10.342

Cited by 11 publications

(2 citation statements)

References 42 publications

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“…(a–c) Cole–Cole curves of MC–CNFs; (d) C 0 ; (e) dependence of the matching thickness on the matching frequency at the quarter wavelength of MC–CNFs-1:1–900; (f) SRL l ; (g) SRL lt ; ,,− and microwave-absorbing properties under (h) immersion in different solutions and (i) thermal process.…”

Section: Results and Discussionmentioning

confidence: 99%

Biologically Inspired Nanoporous PAN/PMMA/β-CD Carbon Fibers for Efficient Microwave Absorption

Deng,

Yang,

Liu

et al. 2024

ACS Appl. Nano Mater.

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One-dimensional carbon nanofibers (CNFs) have great potential as lightweight wave absorbers due to their excellent plasticity and stability. However, a high electrical conductivity tends to generate massive reflected waves on the surface of these absorbers. Therefore, the microwave absorption properties need to be modulated by rational microstructural design and heterogeneous interface construction. In this paper, lotus-rootlike multichannel CNFs (polyacrylonitrile/poly(methyl methacrylate)/β-cyclodextrin (PAN/PMMA/β-CD)) were prepared by sacrificial templateassisted electrospinning, followed by a traditional stabilization and carbonization process. The introduction of a multichannel structure together with the overlapping conductive network formed in CNFs not only greatly improves the dielectric loss ability of the material but also provides more pathways for electron transfer. Effective tuning of the channel structure and conductivity of the material can be easily achieved by adjusting the sacrificial agent content and the carbonization temperature. The sample (MC− CNFs-1:1−900) shows good impedance matching characteristics and microwave attenuation when the content of the sacrificial agent in the precursor filament is 50 wt % with the carbonization temperature set at 900 °C. Hence, a minimum reflection loss (RL min ) of −45.19 dB at 2.8 mm and an effective absorption bandwidth (EAB) of 3.825 GHz were achieved for CNFs by a simple method of preparation, providing a solid foundation for the development of high-performance lightweight microwave-absorbing materials (MAMs).

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Section: Results and Discussionmentioning

confidence: 99%

Biologically Inspired Nanoporous PAN/PMMA/β-CD Carbon Fibers for Efficient Microwave Absorption

Deng,

Yang,

Liu

et al. 2024

ACS Appl. Nano Mater.

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“…13 Przybył et al used carbonyl iron for the manufacture of radar-absorbing paints reducing the radar signature of the objects that they cover. 14,15 Bahri-Laleh et al used carbonyl iron (CI) as a magnetic filler and polyaniline (PANI) as a polymeric filler via in-situ polymerization to produce a core-shell composite material with multidisciplinary properties. 16 Wang et al 17 and Ruiz-Perez et al 18 studied various types of carbon fillers according to the electrical features of the carbon materials to reach suitable EM wave shielding.…”

Section: Introductionmentioning

confidence: 99%

A novel three-layer woven fabric composite reinforced by (polyaniline + carbonyl iron) core-shell/carbonyl iron/polyaniline fillers for high-performance broadband radar absorbing structure

Danesh,

Beheshti,

Heidari-Rarani

2023

Journal of Composite Materials

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One of the most important applications of electromagnetic wave absorption is in stealth aircrafts and electromagnetic protection of avionic systems. The main limitations in the design of these structures are aerodynamics, thickness or weight, mechanical strength, manufacturing process, and reasonable cost. In this study, a novel three-layer woven fabric composite laminate (with a total thickness of about 3 mm) is proposed which each layer is reinforced by individual polyaniline, carbonyl iron, or (PANI + CI) core-shell fillers. The developed Non-dominated Sorting Genetic Algorithm II optimization algorithm suggests the stacking sequence of layers, the appropriate thickness of each layer, and the filler weight fraction in each layer to achieve a broadband absorption. Due to using both dielectric and magnetic absorbing fillers, this structure shows well-impedance matching and approximately absorbs 80% of the X-band (8-12 GHz) electromagnetic waves. The maximum reflection loss is about −14dB. Finally, the effect of the addition of absorbent particles on the mechanical properties has been investigated. Experimental results showed that the tensile modulus and strength decrease by about 21.5% and 20.6%, respectively, and the flexural modulus and strength reduce by 21.7% and 19.7%, respectively. However, the (PANI + CI) core-shell filler can be introduced as a high performance absorber filler because it suggests maximum reflection loss with low weight fraction compared to other fillers and consequently the minimum reduction in mechanical properties.

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One-dimensional N-doped Co@C nanowires via a dual-control strategy for excellent electromagnetic absorption at ultralow filler loading

Xu,

Liao,

Zhu

et al. 2024

Applied Surface Science

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Enhanced broadband microwave absorption of Fe/C core-shell nanofibers in X and Ku bands

Cited by 11 publications

References 42 publications

Biologically Inspired Nanoporous PAN/PMMA/β-CD Carbon Fibers for Efficient Microwave Absorption

Biologically Inspired Nanoporous PAN/PMMA/β-CD Carbon Fibers for Efficient Microwave Absorption

A novel three-layer woven fabric composite reinforced by (polyaniline + carbonyl iron) core-shell/carbonyl iron/polyaniline fillers for high-performance broadband radar absorbing structure

One-dimensional N-doped Co@C nanowires via a dual-control strategy for excellent electromagnetic absorption at ultralow filler loading

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