Investigation on microwave absorption characteristics of ternary MWCNTs/CoFe2O4/FeCo nanocomposite coated with conductive PEDOT-Polyaniline Co-polymers

Cao, Yan; Farouk, Naeim; Mortezaei, Nasser; Yumashev, Alexei Valerievich; Akhtar, Majid Niaz; Arabmarkadeh, Arash

doi:10.1016/j.ceramint.2021.01.073

Cited by 39 publications

(10 citation statements)

References 25 publications

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“…For the high-resolution Co 2p XPS spectrum, two fitting peaks located at 780.7 and 796.0 eV are consistent with Co 2p 3/2 and Co 2p 1/2 of the Co(II) state, respectively (Figure e). , Furthermore, other binding energies of 785.1 and 803.3 eV were assigned to the satellite peaks. The iron centers of the +3 oxidation state can be demonstrated by special binding energies of 711.1 and 724.5 eV, which are consistent with Fe 2p 3/2 and Fe 2p 1/2 , respectively (Figure f); in addition, the peaks at 714.4 and 720.0 eV are associated with the satellite peaks. , Therefore, the composite materials are composed of FeCo, CoFe 2 O 4 particles, and carbon. In detail, due to the reducibility of the carbon material, part of the ferrite is reduced to an iron-cobalt alloy.…”

Section: Results and Discussionsupporting

confidence: 61%

“…The iron centers of the +3 oxidation state can be demonstrated by special binding energies of 711.1 and 724.5 eV, which are consistent with Fe 2p 3/2 and Fe 2p 1/2 , respectively (Figure 2f); in addition, the peaks at 714.4 and 720.0 eV are associated with the satellite peaks. 32,33 Therefore, the composite materials are composed of FeCo, CoFe 2 O 4 particles, and carbon. In detail, due to the reducibility of the carbon material, part of the ferrite is reduced to an iron-cobalt alloy.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Microwave Absorbing Ability of Carbon Fibers with Embedded FeCo/CoFe₂O₄ Nanoparticles

Chen

Zheng

Huang

et al. 2021

ACS Appl. Mater. Interfaces

118

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In the face of increasingly severe electromagnetic (EM) wave pollution, the research of EM wave absorbing materials is an effective solution. To reduce the density of traditional absorbing materials, in this work, FeCo/CoFe2O4/carbon nanofiber composites were successfully prepared by electrospinning for the EM wave attenuation application. Benefiting from the loss ability of interface polarization, dipole polarization, and magnetic loss, the composites obtained a bandwidth of 5.0 GHz at a 1.95 mm thickness and an absorption peak of −52.3 dB. More importantly, the radar cross section (RCS) reduction of composite coatings calculated by ANSYS Electronics Desktop 2018 (HFSS) can reach 34.5 dBm2, and the RCS value is almost less than −10 dBm2 when the incident angle is greater than 20°, demonstrating great scattering ability of the material coating to EM waves. This work, combined with the exploration of the mechanism and the simulation analysis of the absorbing coating, will be of significance for the development of absorbing materials.

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Section: Results and Discussionsupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Enhanced Microwave Absorbing Ability of Carbon Fibers with Embedded FeCo/CoFe₂O₄ Nanoparticles

Chen

Zheng

Huang

et al. 2021

ACS Appl. Mater. Interfaces

118

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show abstract

“…Interface engineering strategy has played a positive role in the permeability value via the magnetic coupling effect. Particularly, the construction of hard/soft magnetic hetero interface towards the complimentary magnetic property has attracted the most attention owing to the flexible tailoring of exchange coupling interaction, for example, MWCNTs/ [20][21][22][23][24][25] However, current hard/soft magnetic composites generally accomplish the simple combi nation of magnetic components but lack the finetailoring of exchange coupling intensity, which results in the insufficient coupling and limited MA performance, as it's arduously chal lenging to increase the utilization rate of contact interface due to the absence of robust microstructure. Thereby, to harness the potential advantages of magnetic interfacial effect and sup port MA application, structural optimization for the unit in the magnetic material is significantly indispensable.…”

Section: Introductionmentioning

confidence: 99%

Remarkable Magnetic Exchange Coupling via Constructing Bi‐Magnetic Interface for Broadband Lower‐Frequency Microwave Absorption

Yuan

Zhao

Yang

et al. 2022

Adv Funct Materials

126

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Severe lower‐frequency (2–8 GHz) microwave pollution caused by the rapid development of 5th generation (5G) communication posts significance on cutting‐edge microwave absorbers. However, the intensely coupled wave‐impedance and microwave dissipating ability dramatically hinder their performance in the exact lower‐frequency range. The rationally designed heterostructure of hard/soft ferrite composite provides an efficient solution to address the issue. In this context, core‐shell structured hard/soft BaFe(12‐x)CoxO19@Fe3O4 with abundant heterointerface is created using facile spray‐drying and subsequent solvothermal approach, where hard magnetic BaFe(12‐x)CoxO19 serves as the core and soft magnetic Fe3O4 serves as the shell, respectively. The unique core‐shell integration contributes sufficient magnetic exchange coupling interaction for strong magnetic loss beyond Snoek's limitation, which considerably boosts a lower‐frequency microwave absorption. Accordingly, the minimum reflection loss (RLmin) of typical BaFe11.6Co0.4O19@Fe3O4 microcomposite reaches −48.9 dB at the thickness of 3.5 mm, its bandwidth of reflection loss < −10 dB can cover almost all the S and C bands (2.6–8 GHz). Generally, an easy and controllable pathway is conveyed in this work to encourage improved magnetic loss ability as well as decouple the wave‐impedance and microwave dissipating ability in magnetic composites, which widens the road to the development of advanced lower‐frequency magnetic absorbers.

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“…Cao et al [ 87 ] prepared MWCNTs/CoFe 2 O 4 /FeCo ternary nanocomposites coated with conductive polyaniline (PA@MW/F/C) by sol–gel in situ polymerization ( Figure a). The minimum RL of the 1.5 mm sample at 13.8 GHz was −90 dB, and the effective bandwidth was 4 GHz.…”

Section: Ternary Ferrite Composite Absorbing Materialsmentioning

confidence: 99%

“…Reproduced with permission. [ 87 ] Copyright 2021, Elsevier Ltd. b) Schematic illustration of the fabrication of ferrite/Co/porous carbon microwave absorbing material and calculated results of the RL versus frequency for FC500. Reproduced with permission.…”

Section: Ternary Ferrite Composite Absorbing Materialsmentioning

confidence: 99%

Recent Research Progress of Ferrite Multielement Microwave Absorbing Composites

et al. 2022

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With the extensive application of electrical and wireless equipment, several electromagnetic pollution‐related issues have emerged. Therefore, the manufacturing of absorbing materials has become important to electromagnetic pollution. Ferrite is a common absorbing material; its single absorbing mechanism and narrow absorbing frequency band resist the wider usage as an ideal absorbing material. Adding different materials to ferrite has become a popular way to enhance its microwave absorption properties. Herein, the recent research on ferrite multicomponent microwave absorbing composites is summarized. For ferrite binary composite absorbing materials, the research progress of ferrite and graphene, carbon nanotubes, carbon fiber and other carbon materials, ferrite and polypyrrole, polyaniline and other polymer materials, and ferrite and MXene composites is introduced. In addition, the advancement of ferrite ternary absorbent materials research is also discussed. The growing development trend of ferrite composite absorbing materials is finally summed up, and the prospects of fabricating the “thin, light, wide, and strong” ferrite absorbing materials are put forward.

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Investigation on microwave absorption characteristics of ternary MWCNTs/CoFe2O4/FeCo nanocomposite coated with conductive PEDOT-Polyaniline Co-polymers

Cited by 39 publications

References 25 publications

Enhanced Microwave Absorbing Ability of Carbon Fibers with Embedded FeCo/CoFe₂O₄ Nanoparticles

Enhanced Microwave Absorbing Ability of Carbon Fibers with Embedded FeCo/CoFe₂O₄ Nanoparticles

Remarkable Magnetic Exchange Coupling via Constructing Bi‐Magnetic Interface for Broadband Lower‐Frequency Microwave Absorption

Recent Research Progress of Ferrite Multielement Microwave Absorbing Composites

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Investigation on microwave absorption characteristics of ternary MWCNTs/CoFe2O4/FeCo nanocomposite coated with conductive PEDOT-Polyaniline Co-polymers

Cited by 39 publications

References 25 publications

Enhanced Microwave Absorbing Ability of Carbon Fibers with Embedded FeCo/CoFe2O4 Nanoparticles

Enhanced Microwave Absorbing Ability of Carbon Fibers with Embedded FeCo/CoFe2O4 Nanoparticles

Remarkable Magnetic Exchange Coupling via Constructing Bi‐Magnetic Interface for Broadband Lower‐Frequency Microwave Absorption

Recent Research Progress of Ferrite Multielement Microwave Absorbing Composites

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Product

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Enhanced Microwave Absorbing Ability of Carbon Fibers with Embedded FeCo/CoFe₂O₄ Nanoparticles

Enhanced Microwave Absorbing Ability of Carbon Fibers with Embedded FeCo/CoFe₂O₄ Nanoparticles