Drawing advanced electromagnetic functional composites with ultra-low filler loading

Wu, Zhihua; Qian, Xiang; Pei, Ke; You, Wenbing; Xiao, Li; Jin, Chen; Che, Renchao

doi:10.1016/j.cej.2020.125720

Cited by 13 publications

(10 citation statements)

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“…Reproduced with permission. [ 93 ] Copyright 2021, Elsevier. d,e) Scanning electron microscopy (SEM) images of two stack‐aligned CNTs with intersectional angles of 45° (d) and 90° (e) and f,g) the dependence of their ε′ (f) and ε″ (g) values on intersectional angles.…”

Section: Dimensional Design Of Em Wave Absorption Materialsmentioning

confidence: 99%

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Dimensional Design and Core–Shell Engineering of Nanomaterials for Electromagnetic Wave Absorption

et al. 2022

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Herein, the advances in low-dimensional core-shell EM wave absorption materials are outlined and a selection of the most remarkable examples is discussed. The derived key information regarding dimensional design, structural engineering, performance, and structure-function relationship are comprehensively summarized. Moreover, the investigation of the cuttingedge mechanisms is given particular attention. Additional applications, such as oxidation resistance and self-cleaning functions, are also introduced. Finally, insight into what may be expected from this rapidly expanding field and future challenges are presented.

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Section: Dimensional Design Of Em Wave Absorption Materialsmentioning

confidence: 99%

mentioning

confidence: 99%

Dimensional Design and Core–Shell Engineering of Nanomaterials for Electromagnetic Wave Absorption

et al. 2022

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“…Therefore, as the filling mass fraction increases, the effect on the magnetic permeability is small. In short, the real (µ ) and imaginary (µ ) parts of the samples for the three fill ratios are close to 1 and 0, respectively, which indicates relatively weak magnetic losses due to the natural magnetic resonance [46,47].…”

Section: Electromagnetic Characteristics and Microwave Absorption Pro...mentioning

confidence: 85%

Microstructure, Electromagnetic Properties, and Microwave Absorption Mechanism of SiO2-MnO-Al2O3 Based Manganese Ore Powder for Electromagnetic Protection

et al. 2022

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Considering the electromagnetic protection needs of important ground buildings, exploring the electromagnetic wave (EMW) absorption performance of manganese ore powder (MOP) building materials is an effective way to overcome its low added value and difficulty in popularizing. Here, choosing filling ratios commonly used in building materials such as autoclaved bricks, MOP/paraffin samples with 20%, 40%, and 60% mass fraction of MOP were prepared, and electromagnetic properties were analyzed at 2–18 GHz using the coaxial method. The results show that 60 wt% sample has the best absorption performance, with a minimum reflection loss (RLmin) value of −22.06 dB at 15.04 GHz, and the effective absorption bandwidth (EAB, RL < −10 dB) reaches 4.16 GHz at a 7.65 mm absorber thickness, covering most of the Ku-band region. The excellent microwave absorption performance of MOP is due to its multi-oxide forming multi-interface structure and rough surface, which can not only form abundant dipole and interfacial polarization under the action of EMW, but also reflect and scatter the incident EMW, prolong the transmission path, and enhanced the absorption of microwaves. This study demonstrates that MOP building materials can have excellent microwave absorption properties, thus becoming a new way to address harmful manganese residue; for example, autoclaved bricks, which can not only improve the added value of manganese residue building materials but also can be consumed on a large scale. It provides a new idea to solve the harm of manganese residue.

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“…Although they have many advantages such as cheap, easily available and simple preparation, the mismatched impedance caused by single component severely limited their practical application. The combination of conductive materials and magnetic materials has been proved as an effective method to solve above issue [ 19 ], whereas the traditional preparation methods such as electrochemical plating [ 20 ], ball-milling [ 21 , 22 ] and impregnation [ 23 ] are only processed at molecular level, which cannot get the MAMs with uniformly component distribution and high porosity. Therefore, designing MAMs with excellent microwave absorption (MA) performance using the effective method is highly desired.…”

Section: Introductionmentioning

confidence: 99%

State of the Art and Prospects in Metal-Organic Framework-Derived Microwave Absorption Materials

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Microwave has been widely used in many fields, including communication, medical treatment and military industry; however, the corresponding generated radiations have been novel hazardous sources of pollution threating human’s daily life. Therefore, designing high-performance microwave absorption materials (MAMs) has become an indispensable requirement. Recently, metal–organic frameworks (MOFs) have been considered as one of the most ideal precursor candidates of MAMs because of their tunable structure, high porosity and large specific surface area. Usually, MOF-derived MAMs exhibit excellent electrical conductivity, good magnetism and sufficient defects and interfaces, providing obvious merits in both impedance matching and microwave loss. In this review, the recent research progresses on MOF-derived MAMs were profoundly reviewed, including the categories of MOFs and MOF composites precursors, design principles, preparation methods and the relationship between mechanisms of microwave absorption and microstructures of MAMs. Finally, the current challenges and prospects for future opportunities of MOF-derived MAMs are also discussed."Image missing"

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Drawing advanced electromagnetic functional composites with ultra-low filler loading

Cited by 13 publications

References 50 publications

Dimensional Design and Core–Shell Engineering of Nanomaterials for Electromagnetic Wave Absorption

Dimensional Design and Core–Shell Engineering of Nanomaterials for Electromagnetic Wave Absorption

Microstructure, Electromagnetic Properties, and Microwave Absorption Mechanism of SiO2-MnO-Al2O3 Based Manganese Ore Powder for Electromagnetic Protection

State of the Art and Prospects in Metal-Organic Framework-Derived Microwave Absorption Materials

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