Dielectric properties of nanopowder emulsions in paraffin oil

Mergos, JA; Athanassopoulou, MD; Argyropoulos, TG; Dervos, CT

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	https://dspace.lib.ntua.gr/xmlui/handle/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