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Dielectric properties of nanopowder emulsions in paraffin oil

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dc.contributor.author Mergos, JA en
dc.contributor.author Athanassopoulou, MD en
dc.contributor.author Argyropoulos, TG en
dc.contributor.author Dervos, CT en
dc.date.accessioned 2014-03-01T02:47:20Z
dc.date.available 2014-03-01T02:47:20Z
dc.date.issued 2011 en
dc.identifier.issn 21533725 en
dc.identifier.uri http://hdl.handle.net/123456789/33082
dc.subject adsorption en
dc.subject aluminium en
dc.subject cupric en
dc.subject cuprous en
dc.subject ferric en
dc.subject humidity en
dc.subject interfacial polarization en
dc.subject mineral oils en
dc.subject oxide en
dc.subject relaxation en
dc.subject titanium en
dc.subject.other cupric en
dc.subject.other cuprous en
dc.subject.other ferric en
dc.subject.other Interfacial polarization en
dc.subject.other relaxation en
dc.subject.other Adsorption en
dc.subject.other Copper oxides en
dc.subject.other Dielectric properties of liquids en
dc.subject.other Emulsification en
dc.subject.other Insulating oil en
dc.subject.other Iron oxides en
dc.subject.other Metallic compounds en
dc.subject.other Mineral oils en
dc.subject.other Nanoparticles en
dc.subject.other Nanostructured materials en
dc.subject.other Paraffin oils en
dc.subject.other Paraffin waxes en
dc.subject.other Paraffins en
dc.subject.other Polarization en
dc.subject.other Titanium en
dc.subject.other Titanium dioxide en
dc.subject.other Dielectric liquids en
dc.title Dielectric properties of nanopowder emulsions in paraffin oil en
heal.type conferenceItem en
heal.identifier.primary 10.1109/ICDL.2011.6015449 en
heal.identifier.secondary http://dx.doi.org/10.1109/ICDL.2011.6015449 en
heal.identifier.secondary 6015449 en
heal.publicationDate 2011 en
heal.abstract This work investigates polarization phenomena induced by nanoparticle inclusions in paraffin oil, an insulating organic liquid. Fine metal oxide powders and nanopowders of Al2O3, TiO2, CuO, Cu2O and Fe2O3 were tested at concentrations up to 5% w/v in the liquid matrix. Emulsification was attained by ultrasound treatment. The relative dielectric constant and loss tangent (tand) of both pure oil and emulsions were recorded in the 20 Hz-1 MHz frequency range. Results depend both on grain size and on the specific compound. In the case of alumina nanoparticles, dielectric behavior is dominated by grain surface polarization phenomena induced by adsorbed water. This effect can be partially cancelled out by the addition of titania nanoparticles. Titanium and (to a lesser extent) ferric oxide increased the dielectric constant at middle and high frequencies. Copper (I) and (II) oxides exhibit a distinct relaxation mechanism at the high end of the frequency range. © 2011 IEEE. en
heal.journalName Proceedings - IEEE International Conference on Dielectric Liquids en
dc.identifier.doi 10.1109/ICDL.2011.6015449 en


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