Heterodimensional structure with enhanced interface loss for microwave absorption and EMI shielding

The study of high-performance multifunctional electromagnetic materials is one of the inevitable challenges in the field of electromagnetic wave (EMW) absorption. In order to improve the attenuation ability of EMW and broaden the frequency range of absorbing materials, rational design of material st...

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Bibliographic Details
Published in:Science China materials 2024, Vol.67 (12), p.4021-4030
Main Authors: Guan, Hong-Zhou, Wang, Zhan-Zhan, Wang, Meng-Qi, Zhai, Hua-Zhang, Cao, Mao-Sheng
Format: Article
Language:English
Subjects:
Broadband
Chemistry and Materials Science
Chemistry/Food Science
Copper sulfides
Design optimization
Dipoles
Electromagnetic interference
Electromagnetic radiation
Electromagnetic shielding
Frequency ranges
Lamellar structure
Materials Science
Microwave absorption
Particulate composites
Polarization
Wave attenuation
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Summary:The study of high-performance multifunctional electromagnetic materials is one of the inevitable challenges in the field of electromagnetic wave (EMW) absorption. In order to improve the attenuation ability of EMW and broaden the frequency range of absorbing materials, rational design of material structure and interface is an important way to optimize the effective absorption bandwidth (EAB). Therefore, enhanced-interface and strongly polarized CuS/Ti 3 C 2 T X composites were successfully synthesized by in-situ etching, sacrificial template and freeze-drying techniques. Its EMW absorption performance was improved by optimizing the hybridization ratio and loading content. The maximum reflection loss of CuS@Ti 3 C 2 T X (mass ratio = 5:5) is −54.6 dB and the maximum EAB covering the major of Ku band is 4.72 GHz due to the interface polarization, multiple scattering and dipole polarization. In addition, the electromagnetic interference shielding performance of CuS@Ti 3 C 2 T X (mass ratio = 3:7) is up to 23.9 dB. A new heterodimensional structure was developed by the spherical structure and lamellar, which realizes the broadband EMW absorption and electromagnetic protection.
ISSN:2095-8226
2199-4501
DOI:10.1007/s40843-024-3164-1