Electromagnetic wave absorption enhancement of double-layer structural absorbers based on carbon nanofibers and hollow Co2Y hexaferrite microfibers

Guan, Guangguang; Zhang, Kaiyin; Gong, Lei; Chen, Xin; Li, Xiaoqiang; Wang, Qiuling; Wang, Ying; Xiang, Jun

doi:10.1016/j.jallcom.2019.152302

Cited by 35 publications

(8 citation statements)

References 60 publications

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“…where Z in refers to the input impedance and Z 0 is the free space impedance (376.7 Ω), which can be expressed as follows 32 :…”

Section: Microwave Rl Of the Compositesmentioning

confidence: 99%

Construction of multilayer carbon magnetic heterostructures on the surface of carbon fibers to improve the absorption performance

Jia,

He,

Sun

et al. 2024

Polymer Composites

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This study utilizes the strong complexation effect of polydopamine on metal ions and constructs multilayer carbon magnetic heterostructures on the surface of carbon fibers through the in situ reduction method, thereby obtaining a new type of multilayer carbon‐based composite absorbing material. The absorption properties at different layers were analyzed and compared through various characterization methods. Finally, the double‐layer structure demonstrated outstanding electromagnetic wave absorption characteristics, exhibiting a wide effective absorption bandwidth of 7.24 GHz and robust absorption of −44.48 dB, all within a mere thickness of 3.5 mm. Therefore, excellent market prospects for this material are anticipated.Highlights A multilayer carbon magnetic heterostructure absorbing material was constructed on micrometer‐scale carbon fibers. The test results show that a wide effective absorbing bandwidth of 7.24 GHz and a minimum reflection loss of −44.48 dB are obtained when the composite thickness is 3.5 mm. The prepared multilayer absorbing composites can adapt to a variety of application scenarios and have excellent application prospects in the industry. The self‐polymerization of dopamine and complexation of metal ions were used to construct multilayer absorbing materials, and the dielectric loss and magnetic loss capacity of the carbon fibers improved.

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“…where Z in refers to the input impedance and Z 0 is the free space impedance (376.7 Ω), which can be expressed as follows 32 :…”

Section: Microwave Rl Of the Compositesmentioning

confidence: 99%

Construction of multilayer carbon magnetic heterostructures on the surface of carbon fibers to improve the absorption performance

Jia,

He,

Sun

et al. 2024

Polymer Composites

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“…In addition, at a coating thickness of 2.15 mm, the effective bandwidth of the composite with a 90% (10 dB) reflection loss reached 3.53 GHz (84% of the X-band). Guan et al [408] developed double-layer MWA based on carbon nanofibers (CNFs) and Co 2 Y type. When the absorbing layer is 1.15 mm thick CNFs and the matching layer is 0.85 mm thick Co 2 Y, the R L value is 85.5 dB at 16.1 GHz with an EAB of 7.6 GHz.…”

Section: Hexagonal Ferrites and Other Nanomaterials Compositementioning

confidence: 99%

“…Guan et al. [ 408 ] developed double‐layer MWA based on carbon nanofibers (CNFs) and Co 2 Y type. When the absorbing layer is 1.15 mm thick CNFs and the matching layer is 0.85 mm thick Co 2 Y, the R L value is 85.5 dB at 16.1 GHz with an EAB of 7.6 GHz.…”

Section: Microwave Absorption Performancementioning

confidence: 99%

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Mohammed

Mohammed²,

Srivastava

2022

Cryst. Res. Technol.

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With the fast growth of wireless communication technology in high‐frequency ranges, electromagnetic (EM) interference has become a growing concern that has drawn international attention. The development of materials that can absorb EM radiation is a crucial solution. This review provides a detailed overview of ferrites, specifically hexagonal ferrites and their composites for microwave (MW) absorption. It examines hexagonal ferrite classifications based on the stacking order of their fundamental blocks and their synthesis methods and strategies for improving their magnetic properties. On the other hand, this review included a detailed examination of hexagonal ferrites–conducting polymer, hexagonal ferrites–2D materials, and hexagonal ferrite–other nanomaterials composites for MW absorption applications. Enhancing MW absorption in hexagonal ferrites‐based microwave absorption materials (MAMs) regulates their EM characteristics, improves impedance matching, and creates a diversity of loss mechanisms. In addition, the limitations, challenges, and opportunities of hexagonal ferrites‐based MAMs are discussed, which will be helpful to those working in related areas. As a general application potential, it is worth mentioning that, as a result of recent promising findings in the synthesis of hexagonal ferrites‐based composites, hexaferrite‐based composites are suitable devices in the area of microwave absorption.

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“…However, it is generally difficult to get a satisfactory absorbing performance because of the poor impedance matching for an individual dielectric or magnetic absorber. Therefore, tremendous efforts have been made to develop the efficient nanostructured composite absorbers composed of both magnetic and dielectric components, which would benefit the impedance matching and microwave absorption enhancement through the effective complementarities and synergies between dielectric loss and magnetic loss . For instance, Fe@TiO 2 , Ni@SnO 2 , NiFe/N-GCTs, NiZn ferrite/graphene, and CoNi/N-doped graphene have been reported to display excellent microwave absorption properties.…”

Section: Introductionmentioning

confidence: 99%

CoFe₂/BaTiO₃ Hybrid Nanofibers for Microwave Absorption

Guan

Gao

Xiang

et al. 2020

ACS Appl. Nano Mater.

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CoFe 2 /BaTiO 3 hybrid nanofibers (CoFe 2 /BTO HNFs) have been synthesized via a simple single-spinneret electrospinning followed by a calcination and hydrogen-thermal reduction process for microwave absorption. Electromagnetic and microwave absorption properties of CoFe 2 /BTO HNFs with different compositions are compared with those of pure CoFe 2 NFs and BTO NFs. The results reveal that the CoFe 2 /BTO HNFs with a CoFe 2 /BTO molar ratio of 7:3 exhibit superior microwave absorption properties with a higher intensity and a wider bandwidth at a smaller absorber thickness. An optimal reflection loss (RL) of −82.4 dB at 15.2 GHz and an effective absorption bandwidth (RL ≤ −20 dB) of 5.0 GHz (13.0−18 GHz) are obtained for a thin thickness of only 1.2 mm. Moreover, the absorption band with RL values less than −20 dB can be manipulated between 4.6 and 18 GHz through changing the coating thickness in the range 1.0−3.0 mm. The excellent microwave absorbing performance can be mainly attributed to the better balance between impedance matching and electromagnetic attenuation capacity deriving from the good synergistic effect between dielectric BTO and magnetic CoFe 2 nanoparticles within a such one-dimensional hybrid heteronanostructure as well as the significantly improved interfacial polarization relaxation. Furthermore, the three-dimensional network structure interlinked by these HNFs also contribute to microwave absorption through additional dissipation pathways such as microcurrent, multiple reflections, and scattering. The optimized CoFe 2 /BTO HNFs may be a potential candidate for lightweight and highly efficient microwave absorbing materials.

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Electromagnetic wave absorption enhancement of double-layer structural absorbers based on carbon nanofibers and hollow Co2Y hexaferrite microfibers

Cited by 35 publications

References 60 publications

Construction of multilayer carbon magnetic heterostructures on the surface of carbon fibers to improve the absorption performance

Construction of multilayer carbon magnetic heterostructures on the surface of carbon fibers to improve the absorption performance

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

CoFe₂/BaTiO₃ Hybrid Nanofibers for Microwave Absorption

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Electromagnetic wave absorption enhancement of double-layer structural absorbers based on carbon nanofibers and hollow Co2Y hexaferrite microfibers

Cited by 35 publications

References 60 publications

Construction of multilayer carbon magnetic heterostructures on the surface of carbon fibers to improve the absorption performance

Construction of multilayer carbon magnetic heterostructures on the surface of carbon fibers to improve the absorption performance

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

CoFe2/BaTiO3 Hybrid Nanofibers for Microwave Absorption

Contact Info

Product

Resources

About

CoFe₂/BaTiO₃ Hybrid Nanofibers for Microwave Absorption