Heterogeneous nanospheres comprising FeCo core encapsulated in double-shelled carbon for high-efficiency electromagnetic wave absorption

Journal of Materials Science Materials in Electronics, Journal Year: 2025, Volume and Issue: 36(1)

Published: Jan. 1, 2025

Language: Английский

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Self-Compensating strategy of electronic Structure-Modulated selenide @ carbon nanotube / carbon nanofiber for High-Efficiency electromagnetic wave absorption and corrosion resistance

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160372 - 160372

Published: Feb. 1, 2025

Language: Английский

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Heterointerfaces engineering in MOFs derivatives for superior electromagnetic absorption and thermal management

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160806 - 160806

Published: Feb. 1, 2025

Language: Английский

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Ultra‐Bandwidth Microwave Absorption and Low Angle Sensitivity in Dual‐Network Aerogels with Dual‐Scale Pores

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Aerogels with porous structures offer an attractive approach to modulating electromagnetic parameters and enhancing wave (EMW) absorption performance. However, conventional aerogels are limited by their single-scale pore size fixed orientation, which constrain EMW capabilities. This study introduces dual-scale pores dual-network structure constructed via constant-temperature freezing secondary-infusion method. Multiscale both micrometer- submillimeter-scale when the Ti3C2Tx MXene thermoplastic polyurethane solution is frozen dried at a specific temperature, leading ultra-wide effective bandwidth (EAB) reaching 10.41 GHz in vertical direction. Furthermore, address poor parallel direction, secondary infusion method applied form aerogel structure, forms reflective interfaces perpendicular incident various directions. adjustment enhances EAB direction from 1.58 5.93 GHz, marking 275.32% enhancement, while reaches 8.08 GHz. design strategy overcomes limitations of structural scale arrangement enriching attenuation mechanisms absorber, effectively reducing sensitivity incoming EMW, offering new insights for designing efficient absorbers.

Language: Английский

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Spray-based 3D printed cementitious electromagnetic wave absorption materials: Optimization with structures design

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 470, P. 140615 - 140615

Published: March 3, 2025

Language: Английский

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Designing Lightweight Honeycomb-Structured CB/SiO2 Composites for Exceptional Broadband Microwave Absorption through Nanoscale and Macrostructural Optimization

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120249 - 120249

Published: March 1, 2025

Language: Английский

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Advanced Multiphysics Camouflage Based on Low‐Emissivity Meta‐surface Coupled with Wave‐Absorbing and Thermal‐Insulating Aerogel

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Abstract The irreconcilable camouflage mechanisms of radar and infrared spectroscopy present substantial challenges to integrating multi‐physics field cloaking technology. Although aerogels possess both microwave dissipation thermal insulation, higher emissivity restrict further amelioration in compatible stealth field. Herein, we propose a bilayer configuration comprised aramid nanofiber (ANF) aerogel shielding meta‐surface (ISM). top ISM with low‐pass filtering capabilities is engineered regulate while remaining transparent microwaves. While the bottom quaternary ANF insulation are synthesized by multi‐scale design strategy heterogeneous surface engineering. Through theoretical experimental optimization, assembled composite achieves near‐perfect absorption X‐band, synergy low facilitates concealment windows. Specifically, minimum reflection loss (RL) reaches −32.44 dB, effective bandwidth (EAB) expands 3.69 GHz (8.71–12.40 GHz), integration value ( ΔH ) increases 9.92 dB mm −1 . Additionally, conductivity (0.0288 W (m K) average (0.23 3–5 µm 0.25 8–14 µm) can reduce radiation energy 68.1%. This research provides new thought for multispectral demonstrates enormous potential technologies.

Language: Английский

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Anion Doping Synergistic Strategy Achieving Multi‐Interfaces and Modulated Dielectric Coupling for Efficient Electromagnetic Response

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract Efficient microwave absorbers are needed to address the electromagnetic pollution caused by proliferation of new radio technologies and equipment. Excellent absorption performance can be achieved controlling dielectric constant. Heteroatom‐doped bimetallic materials promising wave (EMA) due their tunable structures low cost. In particular, presence anionic sites significantly affects constant electrical conductivity. Herein, a 1D carbon nanofiber material is prepared encapsulating FeCo nanoparticles in fiber cavity electrostatic spinning. Subsequently, tellurization, vulcanization, selenization processes carried out. FeTe 2 / CoTe @C exhibits stronger conductivity loss lower electronegativity Te. The clever configuration , C heterostructures obtained Te doping generates multi‐heterogeneous interfaces that facilitate charge migration enhance interfacial polarization, obtaining excellent EMA performance. /CoTe an optimum minimum reflection (RL min ) −51.1 dB with matching thickness 2.0 mm, effective bandwidth (EAB) reaches 4.2 GHz. Radar cross‐section (RCS) calculations show great potential for practical military stealth technology. This study offers novel guidance improving properties transition metal matrix composites via coordination modulation.

Language: Английский

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Electrostatic Self-assembled Ceramic Magnetic Ti3C2Tx Nanocomposites Reinforced with Hollow Fe3O4 Particles for Strong and Broadband Absorption of Electromagnetic Waves

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Multidimensional Nanostructures Design of Poly‐Imidazolium Salts Derived N‐Doped Carbon Materials for Electromagnetic Microwave Absorption

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Abstract Poly‐imidazolium salt (PIS) combines the merits of abundant nitrogen sources, excellent chemical and thermal stability adjustable morphology, making it a promising precursor for Nitrogen‐doped (N‐doped) carbon material. Herein, multidimensional PIS are synthesized via facile solvent‐induced strategy. Then, converted into nanofibers, nanoribbons microspheres composed N‐doped carbon. The effects microstructure, N‐doping degree defects on microwave absorption properties investigated in depth. As result, 2D nanoribbon CN‐2‐700 features high specific surface area, significant moderate conductivity, thereby allowing to sustain perfect conductive networks optimal impedance matching at low filler content (8 wt.%). demonstrates minimum reflection loss (RL min ) −50.15 dB an effective bandwidth (EAB) 7.06 GHz (10.44–17.50 GHz). Overall, this work offers novel path developing multi‐dimensional electromagnetic absorbing materials with simple process remarkable performance.

Language: Английский

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