Magnetic, Thermal And Dielectric Properties Of Ferrite-Filled Epoxy Thin Film Composites

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dc.contributor.authorBoon, Moon See
dc.date.accessioned2019-12-03T09:01:19Z
dc.date.available2019-12-03T09:01:19Z
dc.date.issued2014-01
dc.description.abstractThe aim of this research is to study the magnetic, thermal and dielectric properties of ferrite filled epoxy thin film composites for electromagnetic applications. Spin coating technique was used to prepare the thin film composites. The properties of different ferrite filler particles (NiZn ferrite, Ni ferrite and magnetite) filled epoxy thin film composites were investigated in the first stage of the study. It was found that NiZn ferrite filled composite exhibited higher magnetic and thermal properties than Ni ferrite and magnetite filled composite. However, magnetite was chosen as filler to be used in the second stage since it is much cheaper than NiZn ferrite and it also presented the highest dielectric properties among three ferrite filled composites. In the second stage, the effect of surface treatment of magnetite by 3-aminopropyl triethoxysilane coupling agent (3APTES) was determined. In order to observe the relationship between concentration of coupling agent and treatment time towards the properties of magnetite filled epoxy thin film composite, different percentage of 3APTES (5, 10 and 20 wt. %) with variable time (3, 5 and 7 hours) were carried out. The increased of 3APTES amount associated with increasing treatment time enhanced interfacial adhesion of magnetite-matrix, which subsequently resulted an improvement in magnetic, dielectric and thermal properties of the treated composites. However, at fixed treatment time, system treated at 20 wt. % exhibited lower saturation magnetization and thermal conductivity than system treated at 10 wt. %. This phenomenon could be typical due to thick silane coating layer on magnetite filler surface. The relationships between these two factors to the responses (magnetic and dielectric) were determined using Design of Experiment (DOE). Solution 1 of 16.66 wt. % 3APTES and 7 hours treatment time to achieve optimum desired response was selected. Confirmation of the testing result showed that the predicted values of responses match with those of the experimental results.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/9266
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectMagnetic, Thermal And Dielectricen_US
dc.subjectFerrite-Filled Epoxy Thin Filmen_US
dc.titleMagnetic, Thermal And Dielectric Properties Of Ferrite-Filled Epoxy Thin Film Compositesen_US
dc.typeThesisen_US
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