Electromagnetic absorption materials: Current progress and new frontiers

Progress in Materials Science, Год журнала: 2022, Номер 127, С. 100946 - 100946

Опубликована: Март 17, 2022

Язык: Английский

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Heterointerface Engineering in Electromagnetic Absorbers: New Insights and Opportunities

Advanced Materials, Год журнала: 2021, Номер 34(4)

Опубликована: Окт. 4, 2021

Electromagnetic (EM) absorbers play an increasingly essential role in the electronic information age, even toward coming "intelligent era". The remarkable merits of heterointerface engineering and its peculiar EM characteristics inject a fresh infinite vitality for designing high-efficiency stimuli-responsive absorbers. However, there still exist huge challenges understanding reinforcing these interface effects from micro macro perspectives. Herein, response mechanisms interfacial are dissected depth, with focus on advanced characterization as well theoretical techniques. Then, representative optimization strategies systematically discussed emphasis component selection structural design. More importantly, most cutting-edge smart functional devices based reported. Finally, current concrete suggestions proposed, future perspectives this promising field also predicted.

Язык: Английский

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Broadband multispectral compatible absorbers for radar, infrared and visible stealth application

Progress in Materials Science, Год журнала: 2023, Номер 135, С. 101088 - 101088

Опубликована: Фев. 4, 2023

Язык: Английский

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Ultrabroad Microwave Absorption Ability and Infrared Stealth Property of Nano-Micro CuS@rGO Lightweight Aerogels

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Авг. 20, 2022

Developing ultrabroad radar-infrared compatible stealth materials has turned into a research hotspot, which is still problem to be solved. Herein, the copper sulfide wrapped by reduced graphene oxide obtain three-dimensional (3D) porous network composite aerogels (CuS@rGO) were synthesized via thermal reduction ways (hydrothermal, ascorbic acid reduction) and freeze-drying strategy. It was discovered that phase components (rGO CuS phases) micro/nano structure (microporous nanosheet) well-modified modulating additive amounts of changing ways, resulted in variation pore structure, defects, complex permittivity, microwave absorption, radar cross section (RCS) value infrared (IR) emissivity. Notably, obtained CuS@rGO with single dielectric loss type can achieve an bandwidth 8.44 GHz at 2.8 mm low filler content 6 wt% hydrothermal method. Besides, aerogel realizes minimum reflection (RLmin) - 60.3 dB lower 2 wt%. The RCS reach 53.3 m2, effectively reduces probability target being detected detector. Furthermore, laminated architecture multicomponent endowed insulation IR versatility. Thus, this work offers facile method design develop rGO-based absorbers radar-IR stealth.

Язык: Английский

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Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Фев. 21, 2022

The development of multifunctional and efficient electromagnetic wave absorbing materials is a challenging research hotspot. Here, the magnetized Ni flower/MXene hybrids are successfully assembled on surface melamine foam (MF) through electrostatic self-assembly dip-coating adsorption process, realizing integration microwave absorption, infrared stealth, flame retardant. Remarkably, Ni/MXene-MF achieves minimum reflection loss (RLmin) - 62.7 dB with corresponding effective absorption bandwidth (EAB) 6.24 GHz at 2 mm an EAB 6.88 1.8 mm. Strong attributed to three-dimensional magnetic/conductive networks, which provided excellent impedance matching, dielectric loss, magnetic interface polarization, multiple attenuations. In addition, endows low density, heat insulation, flame-retardant functions. This work new strategy for design materials.

Язык: Английский

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Lightweight Fe3C@Fe/C nanocomposites derived from wasted cornstalks with high-efficiency microwave absorption and ultrathin thickness

Advanced Composites and Hybrid Materials, Год журнала: 2021, Номер 4(4), С. 1226 - 1238

Опубликована: Окт. 26, 2021

Язык: Английский

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Design of cellular structure of graphene aerogels for electromagnetic wave absorption

Chemical Engineering Journal, Год журнала: 2021, Номер 426, С. 131894 - 131894

Опубликована: Авг. 20, 2021

Язык: Английский

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Remarkable Magnetic Exchange Coupling via Constructing Bi‐Magnetic Interface for Broadband Lower‐Frequency Microwave Absorption

Advanced Functional Materials, Год журнала: 2022, Номер 32(33)

Опубликована: Июнь 8, 2022

Abstract Severe lower‐frequency (2–8 GHz) microwave pollution caused by the rapid development of 5th generation (5G) communication posts significance on cutting‐edge absorbers. However, intensely coupled wave‐impedance and dissipating ability dramatically hinder their performance in exact range. The rationally designed heterostructure hard/soft ferrite composite provides an efficient solution to address issue. In this context, core‐shell structured BaFe (12‐x) Co x O 19 @Fe 3 4 with abundant heterointerface is created using facile spray‐drying subsequent solvothermal approach, where hard magnetic serves as core soft Fe shell, respectively. unique integration contributes sufficient exchange coupling interaction for strong loss beyond Snoek's limitation, which considerably boosts a absorption. Accordingly, minimum reflection (RL min ) typical 11.6 0.4 microcomposite reaches − 48.9 dB at thickness 3.5 mm, its bandwidth < 10 can cover almost all S C bands (2.6–8 GHz). Generally, easy controllable pathway conveyed work encourage improved well decouple composites, widens road advanced

Язык: Английский

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A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

Small Science, Год журнала: 2021, Номер 2(2)

Опубликована: Ноя. 27, 2021

The electromagnetic (EM) devices have been widely used in communication, electrical engineering, and medical care. However, EM device is a double‐edged sword for its convenience followed by signal pollution radiation. Electromagnetic interference (EMI) combat has brought lots of attention to researchers this field. Researchers made great efforts developing wave absorbing shielding (EMAS) materials reduce power density solve the above problem. majority reported EMAS are powders coatings, which possess merely property. Modern practical application abundant multiple scenes, including high temperature, intense light, water flow, etc. Under circumstances, should be functionalized with outstanding tunable absorption bands. Based on field theory physics, multiexternal fields‐responsive an effective method deal urgently unsolved Thus, herein, different external field‐responsive materials, space–time, electrical, wind, density, flow fields, focused on. Various action mechanisms, synthesis methods, macrostructures summarized detail. Meanwhile, trends novel also discussed order. Finally, challenges designing new type mentioned.

Язык: Английский

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Multifunctional MXene/C Aerogels for Enhanced Microwave Absorption and Thermal Insulation

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Авг. 9, 2023

Two-dimensional transition metal carbides and nitrides (MXene) have emerged as promising candidates for microwave absorption (MA) materials. However, they also some drawbacks, such poor impedance matching, high self-stacking tendency, density. To tackle these challenges, MXene nanosheets were incorporated into polyacrylonitrile (PAN) nanofibers subsequently assembled a three-dimensional (3D) network structure through PAN carbonization, yielding MXene/C aerogels. The 3D effectively extends the path of microcurrent transmission, leading to enhanced conductive loss electromagnetic (EM) waves. Moreover, aerogel's rich pore significantly improves matching while reducing density MXene-based absorbers. EM parameter analysis shows that aerogels exhibit minimum reflection (RLmin) value - 53.02 dB (f = 4.44 GHz, t 3.8 mm), an effective bandwidth (EAB) 5.3 GHz (t 2.4 mm, 7.44-12.72 GHz). Radar cross-sectional (RCS) simulations employed assess radar stealth effect aerogels, revealing maximum RCS reduction perfect electric conductor covered by aerogel reaches 12.02 m2. In addition MA performance, demonstrates good thermal insulation 5-mm-thick can generate temperature gradient over 30 °C at 82 °C. This study provides feasible design approach creating lightweight, efficient, multifunctional

Язык: Английский

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