Improved microwave absorbing properties of core-shell FeCo@C nanoparticles

Tan, Qiulan; Li, Tao; Rehman, Sajjad Ur; Zhong, Minlin; Wang, Lei; Chen, Changcai; Xiong, Houdong; Xie, Weicheng; Zhong, Zhenchen

doi:10.1088/2053-1591/ab1561

Cited by 14 publications

(2 citation statements)

References 30 publications

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“…According to the EMW absorption mechanism, EMW absorbing materials can be divided into two types of dielectric loss and magnetic loss. [ 13,14 ] The former such as carbon nanotubes (CNT), [ 15 ] reduced graphene oxide (rGO), [ 16 ] bio‐carbon materials, [ 17 ] etc., is mainly caused by the material's own resistance loss or multi‐polarization effect. [ 18,19 ] The latter such as magnetic oxides, magnetic metals, and their alloys, for example, CoNi, [ 20 ] NiFe 2 O 4 , [ 21 ] CoFe 2 O 4 , [ 22 ] etc.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Wang

et al. 2022

Macro Materials & Eng

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The preparation of the electromagnetic wave (EMW) absorbing materials with 3D porous structural, light weight, and high mechanical strength has been receiving greater attention for a long time. A series of light‐weight polyetheretherketone/graphite/FeCo ternary heterogeneous composite foams (PEEK/C/FeCo) with high mechanical strength are prepared via thermally induced phase separation. Based on the high compressive strength of PEEK resin and its stable skeleton formed by thermally induced phase separation, the composite foam has high compressive strength and low density. In addition, during the thermally induced phase separation process, porous structures are formed inside the PEEK, and graphite and FeCo particles are uniformly dispersed between the pore structures, the composite foams possess excellent porous structure, moderate dielectric loss, and magnetic loss, exhibiting good absorbing properties. With the low density of 0.49 g cm−3 and high compressive strength of 6.40 MPa, the as‐synthesized optimal sample (PEEK‐50/C‐40/FeCo‐10) achieves a minimum reflection loss up to −35.9 dB covering a bandwidth of 3.6 GHz for a thickness of 1.5 mm. In a word, this study provides a novel, economical, and efficient way to obtain a light foam with high mechanical strength and good EMW absorbing property.

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Section: Introductionmentioning

confidence: 99%

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Wang

et al. 2022

Macro Materials & Eng

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“…To take an example, some have concentrated on creating insulate shells on the metallic particles in the form of core-shell structures. To know more on this strategy, the interacted reader can refer to FeCo@SnO 2 [15], FeCo@C [16][17][18], Fe@SiO 2 [19][20][21] and Ni@(SiO 2 , TiO 2 ) [22]. There are numerous works on the microwave absorption properties of metallic/(carbon based) composites.…”

Section: Introductionmentioning

confidence: 99%

Tailoring complex permittivity and permeability to enhance microwave absorption properties of FeCo alloy particles through adjusting hydrazine reduction process parameters

Zare

Shams

Jazirehpour

2020

Mater. Res. Express

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Owing to their high permeability, metallic soft magnetic materials exhibit high potential as microwave absorbers. The great challenge in designing desirable absorption properties from these materials is their large electrical permittivity at microwave frequencies. So, decreasing their permittivity within acceptable limits while keeping permeability at sufficiently high or improved levels is considered an important requirement for matching impedance and obtaining excellent electromagnetic (EM) absorption properties. In the present research, FeCo alloy particles produced employing by a simple wet chemical reduction process with the intention of investigating dependence of their EM properties on synthesis parameters. The characterizations were done with the help of x-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The intrinsic EM properties (ε r , μ r ) in a frequency range of 2-18 GHz were measured by a vector network analyzer (VNA) for the paraffin composites containing obtained products. The results indicated that the concentration of NaOH and metallic salts as the synthesis precursors can tune the permittivity and permeability. Under optimum conditions, bandwidths of 7.3 and 5.5 GHz with thicknesses of only 1.2 and 1.5 mm were obtained respectively. Also, Reflection loss (RL) of −45 dB was attained. The excellent EM absorption properties demonstrated that the synthesized FeCo alloy may be an ideal absorber having both a wide absorption bandwidth and a low thickness.

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Mössbauer and magnetic properties of graphene oxides coatings on Fe and FeCo powders for high frequency applications

2023

J Radioanal Nucl Chem

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Improved microwave absorbing properties of core-shell FeCo@C nanoparticles

Cited by 14 publications

References 30 publications

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Tailoring complex permittivity and permeability to enhance microwave absorption properties of FeCo alloy particles through adjusting hydrazine reduction process parameters

Mössbauer and magnetic properties of graphene oxides coatings on Fe and FeCo powders for high frequency applications

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