{"title":"Magnetic/ceramic/conductive nanocomposite with a broadband microwave absorption and an effective RCS and far field reduction","authors":"Hoda Hekmatara, Mahdieh Dehghani-Dashtabi, Seyyed Mahdy Baizaee, Masoud Mohebbi, Shabnam Nouradini","doi":"10.1016/j.diamond.2025.112145","DOIUrl":null,"url":null,"abstract":"<div><div>Designing light weight and thin radar absorber composites with a broad absorption bandwidth which cover the whole frequency bands can be crucial to overcome the serious problem of electromagnetic pollution. FeNi-NiO/SiO<sub>2</sub>/GO magnetic/ceramic/conductive nanocomposites which were prepared by decorating FeNi-NiO/SiO<sub>2</sub> magnetic/ceramic NPs on the GO sheets with the certain weight ratios of 1:1, 1:2 and 1:3 show broad absorption bandwidth at low thickness. The lowest reflection loss (RL<sub>min</sub> = −49.12 dB) was observed for FeNi-NiO/SiO<sub>2</sub>/GO 1:3 at 1.7 mm thick, with an effective bandwidth of 8.2GHz (8.23-18GHz). However, the broadest bandwidth was observed for the FeNi-NiO/SiO<sub>2</sub>/GO 1:1 at 1.7 mm, which covers the entire band in the range of 8-18GHz with RL<sub>min</sub> = −38.53 dB. An excellent microwave absorption performance of FeNi-NiO/SiO<sub>2</sub>/GO nanocomposites originated from dielectric/magnetic/conduction loss synergy. The radar cross section (RCS) and far field calculation showed that by covering a typical perfect electrical conductor (PEC) sphere with nanocomposites, the RCS and far field reduced 30-48 dB and 20-30 dB, respectively, in comparison with uncovered PEC.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112145"},"PeriodicalIF":5.1000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Diamond and Related Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S092596352500202X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/27 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}
引用次数: 0
Abstract
Designing light weight and thin radar absorber composites with a broad absorption bandwidth which cover the whole frequency bands can be crucial to overcome the serious problem of electromagnetic pollution. FeNi-NiO/SiO2/GO magnetic/ceramic/conductive nanocomposites which were prepared by decorating FeNi-NiO/SiO2 magnetic/ceramic NPs on the GO sheets with the certain weight ratios of 1:1, 1:2 and 1:3 show broad absorption bandwidth at low thickness. The lowest reflection loss (RLmin = −49.12 dB) was observed for FeNi-NiO/SiO2/GO 1:3 at 1.7 mm thick, with an effective bandwidth of 8.2GHz (8.23-18GHz). However, the broadest bandwidth was observed for the FeNi-NiO/SiO2/GO 1:1 at 1.7 mm, which covers the entire band in the range of 8-18GHz with RLmin = −38.53 dB. An excellent microwave absorption performance of FeNi-NiO/SiO2/GO nanocomposites originated from dielectric/magnetic/conduction loss synergy. The radar cross section (RCS) and far field calculation showed that by covering a typical perfect electrical conductor (PEC) sphere with nanocomposites, the RCS and far field reduced 30-48 dB and 20-30 dB, respectively, in comparison with uncovered PEC.
期刊介绍：
DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices.
The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.
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