Multiple Charge Carriers Manipulation Toward Semiconductive Ceramic Nanocomposites for Corrosion‐Resistant Electromagnetic Wave Absorption

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

Published: April 1, 2025

Abstract The modulation of transport properties in ceramic‐based semiconductors can be used to optimize the electromagnetic response mechanism and performance. A semiconductor ceramic foam interlayer wall (SCFW) is designed by a physical vapor deposition method. structural SCFW composed semiconductor‐insulator‐semiconductor layers, incorporating composite system SiC, Al 4.8 Si 1.2 O 9.6 , 2 3 . Moreover, hierarchical network structure controlled pyrolysis‐deposition kinetic process. Electrons holes are transported through heterojunctions between SiC achieving effective charge relaxation. matrix provides lightweight (density 0.967 g cm −3 ), while determines excellent wave (EMW) absorption performance SCFW, with an bandwidth up 14.8 GHz under (minimum reflection loss RL min = −50.6 dB). has been proven exhibit corrosion resistance thermal insulation properties, conductivity 0.025 W m −1 K This study valuable insights into design dielectric property optimization nanocomposites, which leads strong polarization loss, opening new avenues for application EMW absorbers, ceramics.

Language: Английский

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Ultralight 3D cross-linked reinforced graphene@Fe3O4 composite aerogels for electromagnetic wave absorption

Materials Research Bulletin, Journal Year: 2024, Volume and Issue: 173, P. 112696 - 112696

Published: Jan. 15, 2024

Language: Английский

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Anion Doping as a “Trigger” to Modulate Defect‐Tailored Dielectric Coupling for Ultrathin Microwave Absorber

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Abstract Anion doping engineering is recognized as a prospective strategy to adjust the electronic configuration and transport capacity of carbon‐based magnetoelectric hybrids optimize defects for modulation electromagnetic (EM) properties. This study effectively accomplishes an overwhelming enhancement in dielectric coupling between conduction polarization CuCo bimetallic/carbon system by employing situ (N, O)/ex (S, Se) defect strategies. The well‐designed lattice distortions are facilitated large atomic radii (Se) intercalated carbon skeleton bimetallic CuCo, which activate reinforcement dipole high‐frequency region. Interestingly, appropriate number vacancies acts “electron traps” accelerate local charge redistribution, endowing with extremely strong interactions interface‐induced polarization. It remarkable that ultra‐thin feature (1.8 mm) able achieve extraordinary microwave attenuation (‒56.1 dB). Additionally, specific upgrading anionic Se beneficially hinders development phonon transmission, conferring Cu 2 Se/CoSe /NC‐Se aerogel outstanding infrared stealth capabilities along inheriting advantages traditional (lightness, compressive/structural stability, hydrophobicity/anti‐corrosive properties). research offers distinctive perspectives on advanced design multifunctional absorbers complex environments.

Language: Английский

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3D-Printed (CoCrFeMnNi)3O4@C-GR dual core–shell composites: Multilevel control and mechanisms of microwave absorption performance

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154777 - 154777

Published: Aug. 12, 2024

Language: Английский

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Construction of ZnFe2O4/C/CG composites with low-frequency and broadband electromagnetic wave absorption

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

Published: Feb. 1, 2025

Language: Английский

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