Electrical properties of epoxy/graphite flakes microcomposite at the percolation threshold concentration

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dc.contributor.authorAlsoud, Ammar Awadallah Ahmadcs
dc.contributor.authorDaradkeh, Samercs
dc.contributor.authorShaheen, Adel Acs
dc.contributor.authorAl-Hroub, Qasim Amjadcs
dc.contributor.authorKnápek, Alexandrcs
dc.contributor.authorMousa, Marwancs
dc.contributor.authorSobola, Dinaracs
dc.coverage.issue5cs
dc.coverage.volume99cs
dc.date.accessioned2024-05-16T13:46:46Z
dc.date.available2024-05-16T13:46:46Z
dc.date.issued2024-04-17cs
dc.description.abstractThe electrical properties and activation energy of epoxy/graphite flakes (GFs) micro-composite with different content of GFs (0.0625-1 wt%) were studied for electrical properties using Novocontrol Alpha Analyser (10-2 Hz-107 Hz). GFs sizes ranged from (100 nm to 10 mu m). The analysis was performed by scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), visible spectrum reflectance spectra (VIS) spectra, and Fourier Transform Infrared spectra (FTIR) spectroscopy. Increasing GFs content caused multiple changes in electrical characteristics. At 0.0625 wt%, all electrical properties noticeably increased. But at 0.125 to 0.25 wt%, immobilized nanolayers were formed leading to decreased permittivity, dielectric loss (tan(delta)), quality factor (Q-factor), capacitance, conductivity, and figure of merit (F-factor). At 0.25 wt%, the epoxy microcomposite had lower permittivity, tan(delta), conductivity, and capacitance compared with unfilled epoxy. With 0.5 wt% of GFs, signified the percolation threshold, initiating a rise in permittivity, conductivity, capacitance, and tan(delta), accompanied by the closer proximity of grain boundaries, facilitating the formation of conductive channels. At a concentration of 1 wt% of GFs, the establishment of continuous interfacial conductive pathways resulted in a remarkable augmentation of all dielectric properties. The Cole-Cole analysis has been employed to investigate variations in epoxy/GFs microcomposites based on concentration levels.en
dc.formattextcs
dc.format.extent1-15cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPHYSICA SCRIPTA. 2024, vol. 99, issue 5, p. 1-15.en
dc.identifier.doi10.1088/1402-4896/ad3b50cs
dc.identifier.issn1402-4896cs
dc.identifier.orcid0000-0003-0752-8214cs
dc.identifier.orcid0000-0002-0008-5265cs
dc.identifier.other188482cs
dc.identifier.researcheridE-6640-2013cs
dc.identifier.researcheridG-1175-2019cs
dc.identifier.scopus36544102200cs
dc.identifier.scopus57189064262cs
dc.identifier.urihttps://hdl.handle.net/11012/245532
dc.language.isoencs
dc.publisherIOP Publishing Ltdcs
dc.relation.ispartofPHYSICA SCRIPTAcs
dc.relation.urihttps://iopscience.iop.org/article/10.1088/1402-4896/ad3b50/pdfcs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1402-4896/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectgraphite flakesen
dc.subjectepoxy resinen
dc.subjectepoxy nanocomositeen
dc.subjectepoxy microcomositeen
dc.subjectdielectric propertiesen
dc.titleElectrical properties of epoxy/graphite flakes microcomposite at the percolation threshold concentrationen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-188482en
sync.item.dbtypeVAVen
sync.item.insts2024.05.16 15:46:46en
sync.item.modts2024.05.16 15:16:23en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav fyzikycs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé keramické materiálycs
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav mikroelektronikycs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav fyzikálního inženýrstvícs
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