Heterointerface engineering of polymer-based electromagnetic wave absorbing materials

Soft Science, Journal Year: 2025, Volume and Issue: 5(1)

Published: Jan. 18, 2025

Heterointerface engineering has drawn considerable interest in tuning interfacial polarization and promoting impedance matching. Therefore, it become a key strategy for optimizing electromagnetic wave (EMW) absorption. This comprehensive review primarily focused on the EMW absorbing strategies of polymer-based materials, emphasizing critical developments heterointerface engineering. A possible mechanism materials was proposed, synergism multi-components, microstructure design, Key innovations structural design such as porous structure, multilayered segregated structure are explored, highlighting their contributions to enhancing Also, highlights latest research progress advanced conductive insulating with desirable absorption performance; fabrication methods, structures, properties, mechanisms were elucidated detail. challenges presented followed by some future perspectives.

Language: Английский

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Lattice distortion boosted exceptional electromagnetic wave absorption in high-entropy diborides

Matter, Journal Year: 2025, Volume and Issue: 8(3), P. 102004 - 102004

Published: Feb. 18, 2025

Language: Английский

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Enhanced low‐frequency microwave absorption via polarization loss in nanodomain‐rich SiCN

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

Published: March 28, 2025

Abstract Polymer‐derived ceramics (PDCs), known for their exceptional thermal stability and adjustable dielectric characteristics, show great promise in electromagnetic wave absorption applications under extreme temperature conditions. Their multiphase multi‐heterointerface structures also enable effective low‐frequency 5G applications, a crucial yet underexplored capability. In this study, nickel‐modified SiCN (SiCN/Ni) were synthesized through coordination crosslinking of trace amounts nickel‐based metal‐organic framework (Ni‐MOF) with polysilazane precursor, followed by high‐temperature pyrolysis. The investigation reveals that Ni‐MOF enables the formation both magnetic loss components, specifically SiC nanocrystals, free carbon, Ni 2 Si during synthesis process at reduced coexistence electromagnetic‐transparent absorbing phases enhances impedance matching. heterogeneous nanodomains create multiple interfaces, induce significant lattice strain, produce abundant structural defects, which together enhance interfacial dipole polarization effects. Notably, optimized SiCN/Ni ceramic exhibits microwave performance low frequency, achieving minimum reflection –46.1 dB 5.28 GHz. bandwidths reach 0.76 1.0 GHz thicknesses 4.0 5.0 mm, fully covering n 78 band (3.3–3.8 GHz) 79 (4.4–5.0 used communications. These findings present new opportunities developing advanced lower‐frequency absorbers based on PDCs.

Language: Английский

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Obtaining Low‐Frequency and Broadband Absorbing Ferrite@C Microspheres through the High Entropy Engineering and Construction of Opened‐Hollow Multi‐Shell Architecture

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

Published: April 10, 2025

Abstract The flexible manipulation of the position and type metal cations in spinel ferrites gives possibility tuning its dielectric magnetic properties, thus opening up broad design space for broadband low‐frequency absorption. However, there are still challenges how to ensure that diverse designs can be effectively introduced into ferrite lattice form homogeneous entropy‐stable compounds, further engender stable compounds with special multi‐interface hollow micro‐nano structures achieve lightweight efficient performance. In this paper, opened‐hollow multi‐shell high‐entropy (FeCoNiZnMg)Fe 2 O 4 @C microspheres a controllable carbon‐coated triple‐shell composition constructed. designed structure enhances interactions between shells regulates domain effective fields. an incredibly high absorption strengths (−60.5 dB) wide (9.3 GHz). Meanwhile, entropy effect adjusts anisotropic field size, significantly improving 4–8 GH band, far exceeding performance ferrite@C materials without forming phase. This unique composite based on strategy offers exciting prospects rational accurate construction polarization design.

Language: Английский

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Facial synthesis of MCeO_x/porous carbon (M=Fe, Ni, and Co) composites with dielectric/magnetic properties for microwave absorption

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The transition metal ion-doped CeO 2 produces abundant oxygen vacancies, leading to excellent MA performance and radar stealth effect.

Language: Английский

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