Enhanced electromagnetic wave absorption properties of ZIF-67 modified polymer-derived SiCN ceramics by in situ construction of multiple heterointerfaces

Geng, Tao-Bo; Yu, Gaoyuan; Shao, Gaofeng; Huang, Xiaogu

doi:10.1007/s12598-023-02270-8

Cited by 32 publications

(6 citation statements)

References 42 publications

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“…Only good impedance matching can bring desired absorbing performance. 27 In order to explore the impedance matching effect of the MAMs prepared in this work, the impedance matching characteristics of the samples are studied, as illustrated in Fig. 6.…”

Section: Resultsmentioning

confidence: 99%

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Bi,

Dai,

et al. 2024

ECS J. Solid State Sci. Technol.

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High-performance and cost-effective microwave absorbing materials are of vital importance in not only military but also civil fields. Here, an in-situ generation-carbonization one-step method is proposed to synthesize excellent absorbents based on a common solid waste, willow catkins. The results demonstrate that the microwave absorption performance has been successfully improved owing to the magnetic particles, the core-shell nanoparticles, and the hierarchical porous structure, which results in strong conductivity loss, dielectric loss, magnetic loss, interface polarization, and multiple scattering. The maximum reflection loss (RLmax) reaches up to -50.66 dB and -49.09 dB, respectively, at 16.6 and 17.1 GHz with the thickness of 1.65 mm, resulting in double-peak absorption. What’s more, the effective absorption bandwidth (EAB, RL<−10 dB) can get up to 5.7 GHz (from 12.4 to 18 GHz) with the thickness of 1.84 mm. Great absorption performance can be obtained simply through impregnation and carbonization, which constructs a fruitful and cost-effective paradigm for resource utilization of solid waste such as willow catkins.

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Section: Resultsmentioning

confidence: 99%

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Bi,

Dai,

et al. 2024

ECS J. Solid State Sci. Technol.

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“…With the continuous development of information technology, wireless equipment, such as mobile phones and laptops, has been greatly convenient for people's lives. However, it has also been accompanied by serious electromagnetic interference and pollution issues, which may affect the stability of communication signals, as well as impair human health [1][2][3][4][5][6][7]. Therefore, it is of great significance to study efficient electromagnetic (EM) wave absorption materials.…”

Section: Introductionmentioning

confidence: 99%

Design of broadband metamaterial absorber utilized by flower-shaped unit loaded with lumped-resistor

Tian,

Zhang,

Zhao

et al. 2024

EPJ Appl. Metamat.

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A metamaterial broadband absorber is designed by means of metal pattern and lumped resistance. The optimal structural parameters and resistance are scanned in certain steps to determine. The maximum absorbing bandwidth can achieve up to 8.2 GHz with 3 mm thickness. Subsequently, the angle stability of the absorber can be improved by adding vertical metal through holes. After optimization, the maximum absorbing bandwidth can be further increased to 9.1 GHz (8.3–17.4 GHz), and the effective absorption bandwidth of 3.7 GHz (9.53–13.25 GHz) can still be achieved when the incident angle is 60°. Further analysis reveals that the dissipation of the electromagnetic wave is achieved by ohmic loss caused by the resistive element and magnetic resonance caused by the induced circular current, rather than by temperature or other factors. Finally, to verify the real performance of the designed metamaterial absorber, a 30 cm × 30 cm sample was fabricated, and the reflection coefficient was tested by the NRL arch test method. The results showed that the measured return loss of the absorber was consistent with the simulation results.

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“…Fortunately, compared to candidate EMW absorbers such as MXene, carbon materials, MOFs, etc., the Fe–Ni alloys have been extensively used due to affordability and ease of preparation. , Moreover, it also benefits from its relatively high saturation magnetization and strength, high Snoek limit, and easy adjustment of the magnetic resonance frequency by shape anisotropy. , For instance, Shen et al conducted a comparative research on the EMW absorption performance of Fe 20 Ni 80 particles with various shapes. The results showed that the wormlike particles significantly outperformed the others.…”

Section: Introductionmentioning

confidence: 99%

“…Fortunately, compared to candidate EMW absorbers such as MXene, 15 carbon materials, 16 MOFs, 17 etc., the Fe−Ni alloys have been extensively used due to affordability and ease of preparation. 18,19 Moreover, it also benefits from its relatively high saturation magnetization and strength, high Snoek limit, and easy adjustment of the magnetic resonance frequency by shape anisotropy.…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis of Heterostructured Fe–Ni Nanowires with Tunable Electromagnetic Wave Absorption Capabilities

Yang

Cai

Ruan

et al. 2023

ACS Appl. Nano Mater.

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One-dimensional iron–nickel (Fe–Ni) heterogeneous nanowires with superior electromagnetic wave (EMW) absorption were successfully prepared by a magnetic-field-assisted liquid-phase reduction method. The electromagnetic properties of the absorber were controllably tuned by changing the atomic molar ratio of Fe to Ni. The composite with an Fe:Ni atomic molar ratio of 1:1.5 exhibited the finest EMW absorption characteristics. With a matched thickness of 2.175 mm, the minimum reflection loss (RLmin) at 18 GHz can be as high as 26.106 dB. Also, the majority of the Ku-band is covered by the effective absorption bandwidth (EAB, RL ≤ −10 dB), which is up to 6.08 GHz at 2.6 mm with a filler content of 25%. The excellent absorber performance is due to one’s own rich heterogeneous interface to conciliate the dielectric and magnetic losses. The successful exploration of the one-dimensional heterogeneous structure EMW absorber provides important insights for the future sensible fabrication of absorbers with excellent EMW absorption capability.

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Enhanced electromagnetic wave absorption properties of ZIF-67 modified polymer-derived SiCN ceramics by in situ construction of multiple heterointerfaces

Cited by 32 publications

References 42 publications

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Design of broadband metamaterial absorber utilized by flower-shaped unit loaded with lumped-resistor

In Situ Synthesis of Heterostructured Fe–Ni Nanowires with Tunable Electromagnetic Wave Absorption Capabilities

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