Recent Advances on the Electromagnetic Wave Absorption Properties of Ni Based Materials

Zhao, Biao; Deng, Jiushuai; Zhang, Rui; Liang, Linyun; Fan, Bingbing; Bai, Zhongyi; Shao, Gang; Park, Chul

doi:10.30919/es8d735

Cited by 67 publications

(55 citation statements)

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“…This model establishes the relationship between (ε and ε"), which is termed the Cole-Cole semicircle. It implies that the plot of ε" against ε will exist as a semicircle indicating a polarization process [25]. Figure 8a-d [13].…”

Section: Em Wave Absorption Propertiesmentioning

confidence: 96%

“…where f, σ, ε o are the frequency, conductivity, and the dielectric constant of vacuum, respectively. It can be deduced that increase in conductivity (σ) will increase the ε", and thus favors the absorption of the EM wave [25]. It can be observed that the samples show several resonance peaks, particularly at Ku-band frequency.…”

Section: Em Wave Absorption Propertiesmentioning

confidence: 99%

“…semicircle. It implies that the plot of ‫׳׳‪ε‬‬ against ε‫׳‬ will exist as a semicircle indicating a polarization process [25]. Figure 8a-d presents the Cole-Cole plots of all samples in the frequency range of 8.2-18 GHz.…”

Section: Em Wave Absorption Propertiesmentioning

confidence: 99%

“…The composite reported in this work displayed enhanced MAP as compared with those reported works. The magnitude of EM wave absorption represented by reflection loss (RL) of all samples were calculated from Equations (16)-(18) below based on the transmission line theory [25], using the FEM formulation.…”

Section: Em Wave Absorption Propertiesmentioning

confidence: 99%

“…This finding reveal that combined moderate attenuation and good impedance matching promotes the EM wave absorption reported in this study. The EM wave attenuation coefficient which describes the capability of the absorptive material to rapidly attenuate and dissipate EM wave via its inherent magnetic and dielectric loss power can be measured by the attenuation constant (∝) [25].…”

Section: Em Wave Absorption Propertiesmentioning

confidence: 99%

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Investigation of the Broadband Microwave Absorption of Citric Acid Coated Fe3O4/PVDF Composite Using Finite Element Method

et al. 2019

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Magnetite (Fe 3 O 4 ) have been thoroughly investigated as microwave absorbing material due to its excellent electromagnetic properties (permittivity and permeability) and favorable saturation magnetization. However, large density and impedance mismatch are some of the limiting factors that hinder its microwave absorption performance (MAP). Herein, Fe 3 O 4 nanoparticles prepared by facile co-precipitation method have been coated with citric acid and embedded in a polyvinylidene fluoride (PVDF) matrix. The coated Fe 3 O 4 nanoparticles were characterized by X-ray diffraction spectrometer (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), and vibrating sample magnetometer (VSM). COMSOL Multiphysics based on the finite element method was used to simulate the rectangular waveguide at X-band and Ku-band frequency range in three-dimensional geometry. The citric acid coated Fe 3 O 4 /PVDF composite with 40 wt.% filler loading displayed good microwave absorption ability over the studied frequency range (8.2-18 GHz). A minimum reflection loss of −47.3 dB occurs at 17.9 GHz with 2.5 mm absorber thickness. The composite of citric acid coated Fe 3 O 4 and PVDF was thus verified as a potential absorptive material with improved MAP. These enhanced absorption coefficients can be ascribed to favorable impedance match and moderate attenuation. Appl. Sci. 2019, 9, 3877 2 of 17 attracted much interest in the field of EM wave absorption. However, Fe 3 O 4 as an absorptive material have some limitations such as the rapid decrease in permeability value at microwave frequency, large density, ease of oxidation and mismatch of impedance which impedes its performance as an ideal MAM [6,7].Recently, several research efforts have been geared towards improving the microwave absorption performance (MAP) of Fe 3 O 4 . For example, Mingxu et al. [8] fabricated hollow Fe 3 O 4 nanoparticles via solvothermal route, with the aim of reducing its density while retaining good magnetic properties for efficient MAP. They established improved EM wave absorption with increasing particle size and change in morphology. Maximum EM absorption with RL value of −55.14 dB at 11.76 GHz was achieved with an absorber thickness of 2.07 mm. Guiquig et al. [9] synthesized nano-Fe 3 O 4 by an innovative wet chemical route, employing hydrazine hydrate as anti-oxidation agent. The synthesized Fe 3 O 4 nanoparticle of average diameter of 77 nm possessed high magnetization saturation and coercivity value of 72.36 emu/g and 95 Oe, respectively. The minimum RL value of −21.2 dB was achieved with 6 mm thickness. Similarly, optimization of the MAP of Fe 3 O 4 via design and fabrication of hierarchical nanostructure have also been explored. Chaomie et al. [10] exploit one-step and template-free synthesis method to prepare octahedral Fe 3 O 4 nanostructure by direct decomposition of an iron organic compound with molten salt. The sample annealed at 800 • C displayed maximum EM absorption of −23.67 dB at 15.24 GHz at a ...

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Section: Em Wave Absorption Propertiesmentioning

confidence: 96%

Section: Em Wave Absorption Propertiesmentioning

confidence: 99%

Section: Em Wave Absorption Propertiesmentioning

confidence: 99%

Section: Em Wave Absorption Propertiesmentioning

confidence: 99%

Section: Em Wave Absorption Propertiesmentioning

confidence: 99%

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Investigation of the Broadband Microwave Absorption of Citric Acid Coated Fe3O4/PVDF Composite Using Finite Element Method

et al. 2019

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Hierarchical Carbon Fiber@MXene@MoS₂ Core‐sheath Synergistic Microstructure for Tunable and Efficient Microwave Absorption

Wang

Liu

Jiao

et al. 2020

Adv Funct Materials

337

184

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Microcosmic 3D hierarchical structural design has proved to be an effective strategy to obtain high-performance microwave absorbers, although the treatments to low-dimensional cells in monolithic framework are usually based on semiempirical rules. In this work, a hierarchical carbon fiber (CF)@MXene@MoS 2 (CMM) core-sheath synergistic structure with tunable and efficient microwave absorption (MA) properties is fabricated by introducing self-assembled Ti 3 C 2 T x MXene on the surface of CF and subsequent anchoring of MoS 2. By the synergistic effects from the MXene sheath increasing the conductive loss and MoS 2 at the outermost layer improving the impedance matching, the MA performance of CMM can be effectively regulated and optimized: the optimal reflection loss is −61.51 dB with a thickness of 3.5 mm and the maximum effective absorption bandwidth covers the whole Ku-band with 7.6 GHz at 2.1 mm. Meanwhile, the whole X-band absorption can also be achieved with specific MoS 2 loading at an optimized thickness.

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Achieving Super Broadband Electromagnetic Absorption by Optimizing Impedance Match of rGO Sponge Metamaterials

Sun

Huang

et al. 2021

Adv Funct Materials

119

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The reduced graphene oxide (rGO) sponges exhibit exciting electromagnetic absorption (MA) performance in high-frequency range. However, it is still a great challenge to realize desirable MA property at low frequency (2-4 GHz) due to the great difficulty in balancing the good interfacial impedance matching and strong dielectric loss. Herein, the MA metamaterials based on rGO sponge with different unit shapes are reported. The relationship between the unit shape and MA performance is explored by experiment and simulation. The results show that frustum pyramid metamaterial exhibits ultrabroad band MA; the qualified absorption (the reflection loss lower than −10 dB) of electromagnetic wave can be achieved at 2.4-40 GHz. The average absorption intensity is −22.9 dB in the band of 2-40 GHz. Moreover, the bandwidth for strong absorption with an absorption rate of 99% (−20 dB) is up to 32 GHz. It is significant that the reflection loss has ignorant change even though the incident angle is increased from 5° to 40°. These are contributed to the excellent impedance matching and strong dielectric loss. These lightweight frustum pyramid metamaterials are very promising in the application for broadband electromagnetic protection.

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Recent Advances on the Electromagnetic Wave Absorption Properties of Ni Based Materials

Cited by 67 publications

References 0 publications

Investigation of the Broadband Microwave Absorption of Citric Acid Coated Fe3O4/PVDF Composite Using Finite Element Method

Investigation of the Broadband Microwave Absorption of Citric Acid Coated Fe3O4/PVDF Composite Using Finite Element Method

Hierarchical Carbon Fiber@MXene@MoS₂ Core‐sheath Synergistic Microstructure for Tunable and Efficient Microwave Absorption

Achieving Super Broadband Electromagnetic Absorption by Optimizing Impedance Match of rGO Sponge Metamaterials

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Recent Advances on the Electromagnetic Wave Absorption Properties of Ni Based Materials

Cited by 67 publications

References 0 publications

Investigation of the Broadband Microwave Absorption of Citric Acid Coated Fe3O4/PVDF Composite Using Finite Element Method

Investigation of the Broadband Microwave Absorption of Citric Acid Coated Fe3O4/PVDF Composite Using Finite Element Method

Hierarchical Carbon Fiber@MXene@MoS2 Core‐sheath Synergistic Microstructure for Tunable and Efficient Microwave Absorption

Achieving Super Broadband Electromagnetic Absorption by Optimizing Impedance Match of rGO Sponge Metamaterials

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Product

Resources

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Hierarchical Carbon Fiber@MXene@MoS₂ Core‐sheath Synergistic Microstructure for Tunable and Efficient Microwave Absorption