Negative permittivity and permeability of polyethylene-based composites with segregated filler network in microwave range

Negative permittivity and permeability of polyethylene-based composites with segregated filler network in microwave range | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Negative permittivity and permeability of polyethylene-based composites with segregated filler network in microwave range Ludmila Yu. Matzui, Ludmila L. Vovchenko, Volodymyr V. Zagorodnii, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6956628/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 17 Dec, 2025 Read the published version in Scientific Reports → Version 1 posted 11 You are reading this latest preprint version Abstract In this paper, the microwave permittivity and permeability were investigated in the frequency range 26–40 GHz in percolative three-phase graphite nanoplatelets (GNPs)/magnetic particles (Fe, Co 3 O 4 )-polyethylene composites with segregated filler network. When GNP content increases up to 5wt.% GNP particles are in close contact, and a 3D segregated highly conductive network is formed and generates metal-like conductivity. For this case, the Drude type negative permittivity behavior is obtained due to plasma oscillation of free electrons within the conductive filler network. The observed relatively high dielectric loss in the composites was mainly induced by the high leakage current through GNP and magnetic particles. In addition, the negative imaginary part of magnetic permeability was observed for developed three-phase composites. Higher GNP content leads to an increase in absolute values of negative imaginary permeability. The comparative analysis of microwave shielding properties of polyethylene composites filled with GNPs and various additional magnetic particles, micron-sized Fe or nanosized Co 3 O 4 showed the higher shielding ability of GNP-Fe-filled composites compared with GNP/Co 3 O 4 ones. The increase of GNP content promotes the enhancement of electromagnetic shielding due to both reflection SE R and absorption SE A although the electromagnetic reflection index R is much higher compared with absorption index A . Physical sciences/Materials science Physical sciences/Nanoscience and technology Physical sciences/Physics graphite nanoplatelets carbonyl iron cobalt oxide permittivity permeability microwave shielding Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 17 Dec, 2025 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 25 Aug, 2025 Reviews received at journal 13 Aug, 2025 Reviews received at journal 06 Aug, 2025 Reviewers agreed at journal 06 Aug, 2025 Reviewers agreed at journal 06 Aug, 2025 Reviewers agreed at journal 03 Aug, 2025 Reviewers invited by journal 02 Aug, 2025 Editor assigned by journal 28 Jul, 2025 Editor invited by journal 23 Jul, 2025 Submission checks completed at journal 17 Jul, 2025 First submitted to journal 17 Jul, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6956628","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":496509749,"identity":"2ee299eb-df2d-4e02-a25f-9b01778429da","order_by":0,"name":"Ludmila Yu. 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When GNP content increases up to 5wt.% GNP particles are in close contact, and a 3D segregated highly conductive network is formed and generates metal-like conductivity. For this case, the Drude type negative permittivity behavior is obtained due to plasma oscillation of free electrons within the conductive filler network. The observed relatively high dielectric loss in the composites was mainly induced by the high leakage current through GNP and magnetic particles. In addition, the negative imaginary part of magnetic permeability was observed for developed three-phase composites. Higher GNP content leads to an increase in absolute values of negative imaginary permeability. The comparative analysis of microwave shielding properties of polyethylene composites filled with GNPs and various additional magnetic particles, micron-sized Fe or nanosized Co\u003csub\u003e3\u003c/sub\u003eO\u003csub\u003e4\u003c/sub\u003e showed the higher shielding ability of GNP-Fe-filled composites compared with GNP/Co\u003csub\u003e3\u003c/sub\u003eO\u003csub\u003e4\u003c/sub\u003e ones. 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