Three-dimensional macroscopic absorbents: From synergistic effects to advanced multifunctionalities

Zhang, Shijie; Lan, Di; Chen, Xingliang; Gu, Yueyuan; Ren, Junwen; Du, Suxuan; Cai, Shichang; Zhao, Xiaomiao; Zhao, Zhiwei; Wu, Guanglei

doi:10.1007/s12274-023-6120-1

Cited by 38 publications

(3 citation statements)

References 360 publications

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“…The RL min values steadily move to lower frequencies as the thickness rises, as seen in Figure S20 (Supporting Information). Equation () can be used to describe it: [ 80,81 ]

\begin{equation}{t}_m = \frac{{n\lambda }}{4} = \frac{{nc}}{{4{f}_m\sqrt {\left| {{u}_r} \right|\left| {{\varepsilon }_r} \right|} }}\left( {n = 1,3,5\ldots} \right)\end{equation}

…”

Section: Resultsmentioning

confidence: 99%

“…Metal organic frameworks (MOFs) can serve as ideal templates for promising EMA materials because of their abundant interfaces and defects, high porosity, and highly regular topology. [19][20][21] However, the poor electrical conductivity of single MOF-based materials restricts the free electron transfer in free space, resulting in less widespread applications. [22] Therefore, how to adjust the EMA performance of MOF materials and derivatives to obtain satisfactory absorbers has become a hot issue.…”

Section: Introductionmentioning

confidence: 99%

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Modulation Engineering of Electromagnetic Wave Absorption Performance of Layered Double Hydroxides Derived Hollow Metal Carbides Integrating Corrosion Protection

Zhou,

Lan

et al. 2023

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Layered double hydroxides (LDHs) with unique layered structure and atomic composition are limited in the field of electromagnetic wave absorption (EMA) due to their poor electrical conductivity and lack of dielectric properties. In this study, the EMA performance and anticorrosion of hollow derived LDH composites are improved by temperature control and composition design using ZIF‐8 as a sacrifice template. Diverse regulation modes result in different mechanisms for EMA. In the temperature control process, chemical reactions tune the composition of the products and construct a refined structure to optimize the LDHs conductivity loss. Additionally, the different phase interfaces generated by the control components optimize the impedance matching and enhance the interfacial polarization. The results show that the prepared NCZ (Ni3ZnC0.7/Co3ZnC@C) has a minimum reflection loss (RLmin) of ‐58.92 dB with a thickness of 2.4 mm and a maximum effective absorption bandwidth (EABmax) of 7.36 GHz with a thickness of 2.4 mm. Finally, due to its special structure and composition, the sample exhibits excellent anticorrosion properties. This work offers essential knowledge for designing engineering materials derived from metal organic framework (MOF) with cutting‐edge components and nanostructures.

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“…The RL min values steadily move to lower frequencies as the thickness rises, as seen in Figure S20 (Supporting Information). Equation () can be used to describe it: [ 80,81 ]

\begin{equation}{t}_m = \frac{{n\lambda }}{4} = \frac{{nc}}{{4{f}_m\sqrt {\left| {{u}_r} \right|\left| {{\varepsilon }_r} \right|} }}\left( {n = 1,3,5\ldots} \right)\end{equation}

…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modulation Engineering of Electromagnetic Wave Absorption Performance of Layered Double Hydroxides Derived Hollow Metal Carbides Integrating Corrosion Protection

Zhou,

Lan

et al. 2023

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“…2 SiC has low density, high melting point, oxidation resistance, and adjustable dielectric properties, making it the most widely studied ceramic-based absorbing material in recent years. 3 Researchers have conducted numerous studies on the dielectric loss and absorption mechanism of SiC, including doping modification, 4,5 morphology modification, 6,7 structural design, 8,9 and component optimization. 10 However, there is a problem with the small complex permittivity and poor dielectric loss of SiC-based absorbing materials, 11 which pose challenges in achieving broadband and strong absorption.…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical and wave‐absorption properties of SiC–Si₃N₄–FeSi porous ceramics by introducing Al

Zhang,

Ma,

et al. 2024

J Am Ceram Soc.

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SiC‐based porous ceramic wave‐absorbing materials have attracted much attention due to their excellent properties such as low density, high‐temperature resistance, and oxidation resistance. In this work, the impedance matching of SiC ceramics is improved by introducing Si3N4 wave‐transparent phase, and the dielectric loss capability of SiC ceramics is enhanced by introducing FeSi wave loss phase. To achieve a balance between impedance matching and absorption loss in porous ceramics, different molar contents of Al were introduced into FeSi to tailor electromagnetic parameters. The effects of introducing FeAlxSi1−x on the phase composition, microstructure, dielectric loss, and microwave absorption mechanism of SiC–Si3N4 porous ceramics were systematically investigated. When FeAl0.25Si0.75 is added, the minimum reflection loss of the porous ceramics is as low as −58.02 dB, and the flexural strength is as high as 87.23 MPa. The presence of Al promotes the transformation of the Si3N4 crystal and the generation of Al2O3. The introduction of FeAl0.25Si0.75 into SiC–Si3N4 has constructed “inductor–capacitor–resistance” microcircuit, which enhances polarization loss, conductivity loss, and magnetic loss, and realized the double enhancement of the mechanical and wave‐absorbing properties of porous ceramics.

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Hierarchical Engineering on Built‐In Electric Field of Bimetallic Zeolitic Imidazolate Derivatives Towards Amplified Dielectric Loss

Zhang,

Zheng,

Lan

et al. 2024

Adv Funct Materials

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Construction of built‐in electric field (BIEF) in nanohybrids has been demonstrated as an efficacious strategy to boost the dielectric loss by facilitating oriented transfer and transition of charges, thus optimizing the electromagnetic wave absorption property. However, the specific influence of BIEF on interface polarization needs to explore thoroughly and the BIEF strength should be further augmented. Herein, several dielectric systems incorporated Mott–Schottky heterojunctions and hollow structures are designed and constructed, where bimetallic zeolitic imidazolate framework are employed to derive Cu‐ZnO Mott–Schottky heterojunctions, and hierarchical structures and BIEF are further enriched by introducing hollow structure and reduced graphene oxide. The well‐established “double” BIEF verified by theoretical calculation and hollow engineering can regulate the conductivity, and enhance the polarization relaxation effectively. Especially, there always coexisted both enhanced charge separation and reversed charge distribution in this “double” BIEF, boosting the interface polarization. Attributing to the synergy of well‐matched impedance and amplified dielectric loss, the obtained hybrids exhibited superior absorption (reflection loss of −46.29 dB and an ultra‐wide effective absorption bandwidth of 7.6 GHz at only 1.6 mm). This work proves an innovative model for dissecting dielectric loss mechanisms and pioneers a novel strategy to explore advanced absorbers through enhancing BIEF.

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Three-dimensional macroscopic absorbents: From synergistic effects to advanced multifunctionalities

Cited by 38 publications

References 360 publications

Modulation Engineering of Electromagnetic Wave Absorption Performance of Layered Double Hydroxides Derived Hollow Metal Carbides Integrating Corrosion Protection

Modulation Engineering of Electromagnetic Wave Absorption Performance of Layered Double Hydroxides Derived Hollow Metal Carbides Integrating Corrosion Protection

Enhanced mechanical and wave‐absorption properties of SiC–Si₃N₄–FeSi porous ceramics by introducing Al

Hierarchical Engineering on Built‐In Electric Field of Bimetallic Zeolitic Imidazolate Derivatives Towards Amplified Dielectric Loss

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Three-dimensional macroscopic absorbents: From synergistic effects to advanced multifunctionalities

Cited by 38 publications

References 360 publications

Modulation Engineering of Electromagnetic Wave Absorption Performance of Layered Double Hydroxides Derived Hollow Metal Carbides Integrating Corrosion Protection

Modulation Engineering of Electromagnetic Wave Absorption Performance of Layered Double Hydroxides Derived Hollow Metal Carbides Integrating Corrosion Protection

Enhanced mechanical and wave‐absorption properties of SiC–Si3N4–FeSi porous ceramics by introducing Al

Hierarchical Engineering on Built‐In Electric Field of Bimetallic Zeolitic Imidazolate Derivatives Towards Amplified Dielectric Loss

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Product

Resources

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Enhanced mechanical and wave‐absorption properties of SiC–Si₃N₄–FeSi porous ceramics by introducing Al