Hollow carbon spheres in microwaves: Bio inspired absorbing coating

Bychanok, D.; Li, Sijin; Sánchez-Sánchez, Á.; Gorokhov, Gleb; Kuzhir, P.; Ogrin, F. Y.; Pasc, Andreea; Ballweg, Thomas; Mandel, Karl; Szczurek, Andrzej; Fierro, Vanessa; Celzard, Alain

doi:10.1063/1.4938537

Cited by 46 publications

(43 citation statements)

References 17 publications

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“…The simplest way to obtain dispersive materials is to use the conductive inclusions inside the composite [17][18][19]. Typically, composites with conductive filler above percolation threshold have pronounced ε ∼ 1/ω dispersion in microwave frequency range.…”

Section: The Advantage Of Using Dispersive Materialsmentioning

confidence: 99%

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Design of Carbon Nanotube-Based Broadband Radar Absorber for Ka-Band Frequency Range

Bychanok¹,

Gorokhov²,

Meisak³

et al. 2017

PIER M

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Abstract-The general principles of design and development of microwave absorbing materials are discussed and analysed in respect to 26-37 GHz frequency range (Ka-band). Dispersive composite materials based on carbon nanotubes in epoxy resin matrix are produced, and their electromagnetic responses are investigated in Ka-band. Both theoretical and experimental results demonstrate that presented composites may be used as compact effective absorbers in 26-37 GHz range.

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Section: The Advantage Of Using Dispersive Materialsmentioning

confidence: 99%

“…The first-principle equations describing the electromagnetic response of such a system in free space are well known [15,16]. The amplitude of the reflected signal in the waveguide is defined as [7,17]:…”

Section: Maximum Od Absorptionmentioning

confidence: 99%

Design of Carbon Nanotube-Based Broadband Radar Absorber for Ka-Band Frequency Range

Bychanok¹,

Gorokhov²,

Meisak³

et al. 2017

PIER M

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“…Whereas the size of the final carbon spheres did not significantly depend on the experimental conditions, their density could be tuned through the concentration of the reactants. Given the carbon precursor used here, i.e., resorcinol-formaldehyde resin, the spheres were made of glassy carbon, a material rather similar to the one with which hollow spheres were prepared from another non-graphitizing precursor and reported recently for EM applications 12 .…”

Section: A Preparation Of Materialsmentioning

confidence: 99%

“…In turn, the materials considered here are formed by highly lossy glassy carbon spheres ordered in a close-packed array. In our recent report 12 we considered a similar structure but based on hollow carbon spheres (HCSs). Compared to the latter, the GCSs are much more mechanically resistant, which is especially important for further practical use.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers worldwide are concentrated on the design of broadband absorbers. Generally, the following mechanisms of EM absorption are used for practical a) dzmitrybychanok@ya.ru; www.nano.bsu.by applications: ferromagnetic resonance 10,11 , Ohmic losses 12,13 , dipole relaxation 14 and lossy scattering in metamaterials 15 . At present, many groups focus on the investigation of carbon-based polymer composites for developing effective microwave absorbers [16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

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Fully carbon metasurface: Absorbing coating in microwaves

Bychanok

Gorokhov

et al. 2017

Journal of Applied Physics

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The microwave-absorbing properties of a heterostructure consisting of an ordered monolayer of porous glassy carbon spheres were experimentally and theoretically investigated in the Ka-band (26-37 GHz) frequency range. The electromagnetic response of such "moth-eye"-like all-carbon metasurface at a normal incidence angle was modelled on the basis of long-wave approximation. Modelling parameters in the Ka-band were used to estimate and predict the absorption properties of monolayers in free space in the range 1-40 GHz. Experimental and theoretical results demonstrate that a metasurface based on porous glassy carbon spheres is an inert, lightweight, compact and perfectly absorbing material for designing new effective microwave absorbers in various practically used frequency ranges.

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Data‐driven methodology to realize strong and broadband microwave absorption properties of polymer‐fly ash cenosphere composite

Bora

Mahanta

Kishore

et al. 2021

J of Applied Polymer Sci

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A very efficient microwave absorption characteristic of conducting polymer (polyaniline or PANI) incorporated fly ash cenosphere (FAC), which is a waste of thermal power plant, is revealed in this work with materials data‐driven approach. The different loading (wt%) of PANI‐FAC hybrids to a polymer such as polyvinyl butyral (PVB) results in different reflection loss (RL). However, RL performances do not improve by simply increasing the PANI‐FAC hybrid loading (wt%) to PVB. Herein, PANI‐FAC loading to PVB is optimized through the electromagnetic data‐driven methodology. A remarkable RL ≤ − 40 dB with entire X‐band (8.2–12.4 GHz) absorption bandwidth (RL ≤ −10 dB, RL value −10 dB corresponds to 90% absorption) is predicted for 8.5 wt% PANI‐FAC hybrid loaded PVB‐PANI‐FAC composite. The predicted RL matched with experimental data (minimum RL value −44.5 dB with X‐band absorption bandwidth), confirming the proposed proof of concept of data‐driven methodology to obtain broadband and robust microwave absorption characteristics of polymer‐FAC composites.

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Hollow carbon spheres in microwaves: Bio inspired absorbing coating

Abstract: Articles you may be interested inDesign of grid-type microwave absorbers with high-permittivity composites of Ag-coated Ni-Zn ferrite particles J. Appl. Phys. 117, 17A311 (2015) Microwave absorbing properties of hollow microspheres plated with magnetic metal films

Cited by 46 publications

References 17 publications

Design of Carbon Nanotube-Based Broadband Radar Absorber for Ka-Band Frequency Range

Design of Carbon Nanotube-Based Broadband Radar Absorber for Ka-Band Frequency Range

Fully carbon metasurface: Absorbing coating in microwaves

Data‐driven methodology to realize strong and broadband microwave absorption properties of polymer‐fly ash cenosphere composite

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