A Bionic Grooving All‐Cementitious‐Dielectric Metastructure with Unprecedented Wide‐Angle Broadband Electromagnetic Wave Absorption Properties

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Abstract The absorption performance of electromagnetic (EM) wave absorbing materials deteriorates sharply at large incident angles, particularly angles exceeding 50°. To overcome this challenge, study proposes a bionic grooving all‐cementitious‐dielectric metastructure (ACDMS), yielding more than 34.6 GHz effective bandwidth ( EAB ) over 0°–60° without any agent. effects structural design, geometric parameters, and on the EM response are investigated by numerical simulations experimental characterizations. It is found that ACDMS enables multiple mechanisms under various including electric field redistribution, multi‐axis interference, surface excitation, diffraction/scattering pathways. Experimental results demonstrate 60° angle, even exceeds normal incidence, achieving relative 163%, ‐20 dB (99% absorption) 33.4 GHz, mean reflectivity −23.4 in 1–40 range. RCS simulation environmental testing across fluctuating humidity (40%–80%) temperature (10–220 °C) exposures underscore exceptional potential for practical applications harsh conditions. combination innovative mechanisms, adaptability convenient cement‐based manufacturing process establishes as promising candidate next‐generation absorbers.

Language: Английский

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Flexible Metamaterial Absorbers Based on Fe₃O₄-Doped Laser-Induced Graphene with Tunable Absorption Bands

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Due to widespread applications of electromagnetic waves (EMWs) in radar and communication systems, there is an urgent need for developing EMW absorbers capable working efficiently at multiple frequency points. In this work, flexible metamaterial (MAs) based on Fe3O4-doped laser-induced graphene (LIG/Fe3O4) are large-scale fabricated with the absorption bands tunable by regulating ferric chloride concentration laser path LIG/Fe3O4 meta-surface. The as-prepared triple band MA demonstrates superior S11 values -15.0 dB (9.0 GHz), -40.7 (12.2 -23.2 (16.8 respectively, attributed subwavelength units LIG/Fe3O4, synergistically combining dielectric magnetic loss. Moreover, MAs exhibit commendable corrosion resistance cross-section reduction characteristics, showing promising potential protection fields.

Language: Английский

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Enhanced electromagnetic wave absorption performance of LaFeO3 in-situ grown on Co/C with optimized impedance matching

Materials Science and Engineering B, Journal Year: 2025, Volume and Issue: 318, P. 118281 - 118281

Published: April 11, 2025

Language: Английский

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Leveraging counteractive temperature-dependent resistivity among components for temperature-insensitive electromagnetic characteristics in lightweight SiOCN ceramics

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163011 - 163011

Published: April 1, 2025

Language: Английский

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One-Dimensional Multicomponent Nanofibers Engineered as Heterostructures for Electromagnetic Stealth Applications

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180631 - 180631

Published: April 1, 2025

Language: Английский

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