Investigation of the Dielectric Properties of Graphite and Carbon Black-Filled Composites as Electromagnetic Interference Shielding Coatings

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dc.authoridGumus, Emre/0000-0002-9446-6420
dc.authoridYagimli, Mustafa/0000-0003-4113-8308
dc.contributor.authorGumus, Emre
dc.contributor.authorYagimli, Mustafa
dc.contributor.authorArca, Emin
dc.date.accessioned2024-06-13T20:18:32Z
dc.date.available2024-06-13T20:18:32Z
dc.date.issued2023
dc.departmentİstanbul Gedik Üniversitesi
dc.description.abstractThe main purpose of electromagnetic interference (EMI) shielding coatings is the insulation of sensitive devices and protect people from electromagnetic field exposure due to its effects on the human body. This paper investigates the dielectric properties, and electromagnetic shielding performances of graphite and carbon black (CB) filled epoxy matrix composites produced by the mechanical mixing method. The sample compositions were created at rates ranging from 1 to 7 wt%. Samples were analyzed by Vector Network Analyzer (VNA) using the coaxial method in the range of 1-14 GHz, including L band, S band, C band, X band and partially Ku band. After determining the scattering parameters with VNA, AC conductivity, absorption, reflection and total shielding efficiency values were calculated. At high frequencies, almost all the samples showed higher AC conductivity. CB-filled samples show higher AC conductivity than graphite-filled samples. The total shielding efficiency (SET) of the graphite-added samples (19-21 dB) is slightly higher than the carbon black-added samples (8-17 dB). Distinct filling ratios in graphite-added samples result in closer shielding behavior in contrast to carbon black-added samples. However, higher shielding efficiency is observed as the CB filler ratio increases. The shielding efficiencies of the samples with both types of filling materials vary little depending on the frequency. Reflection is the main mechanism of the shielding efficiency, which constitutes the majority of total efficiency for all types of samples.
dc.description.sponsorshipScientific Research Projects Coordination Unit of Istanbul Gedik University [GDK202006-05]
dc.description.sponsorshipThis research was funded by the Scientific Research Projects Coordination Unit of Istanbul Gedik University, project number GDK202006-05.
dc.identifier.doi10.3390/app13158893
dc.identifier.issn2076-3417
dc.identifier.issue15
dc.identifier.scopus2-s2.0-85167881309
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.3390/app13158893
dc.identifier.urihttps://hdl.handle.net/11501/1427
dc.identifier.volume13
dc.identifier.wosWOS:001045376800001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofApplied Sciences-Basel
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectCoating
dc.subjectElectromagnetic Interference Shielding
dc.subjectComposites
dc.subjectCarbon Black
dc.subjectGraphite
dc.subjectMicrowave-Absorption
dc.subjectAc Conductivity
dc.subjectNanocomposites
dc.subjectMechanisms
dc.subjectFields
dc.titleInvestigation of the Dielectric Properties of Graphite and Carbon Black-Filled Composites as Electromagnetic Interference Shielding Coatings
dc.typeArticle

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