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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In situ growth of the Y₃Si₂C₂ interphase in SiC_f‐reinforced mullite ceramics for enhanced electromagnetic wave absorption

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 22, 2025

Abstract To meet the rigorous demands placed on electromagnetic (EM) wave absorbing (EWA) materials by harsh service conditions and to reduce EM power density, development of ceramic‐based EWA with high reliability stability has become a subject significant focus. In this study, yttrium silicide carbide interphase was in situ synthesized silicon fibers fabricate Y₃Si₂C₂–SiC f composite molten salt method. These were then incorporated into mullite ceramic matrix, /mullite composites prepared gel injection molding, aiming at enhancing properties. The exhibited reflection loss −28.97 dB 2.44 mm thickness an effective absorption bandwidth 3.066 GHz, outperforming pure SiC due addition . A modified Drude–Lorentz model developed capture multi‐peak permittivity behavior composites. results showed that dipole relaxation hopping migration localized electrons played key roles overall microwave energy attenuation, which closely matched experimental data. Furthermore, simulations electric field distribution radar cross‐section confirmed superior capability practical application potential This study offers valuable theoretical insights design ‐reinforced materials.

Language: Английский

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Low-Frequency microwave absorption and favorable thermal conductivity in epoxy-based composite endowed by boron nitride@cobalt ferrite heterostructure fillers

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180373 - 180373

Published: April 1, 2025

Language: Английский

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Simple Synthesis of Low-Load γ-Fe2O3/C/CNT for Efficient Building Absorber

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112529 - 112529

Published: April 1, 2025

Language: Английский

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Fabrication of 3D Fe0.64Ni0.36-CNTs/Carbon foam hybrid composites for strong wideband electromagnetic wave absorption at thin thickness

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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