Effect of water on permittivity of nanodielectrics exposed to the atmosphere

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dc.contributor.author Dervos, CT en
dc.contributor.author Mergos, JA en
dc.contributor.author Skafidas, PD en
dc.contributor.author Athanassopoulou, MD en
dc.contributor.author Vassiliou, P en
dc.date.accessioned 2014-03-01T02:46:07Z
dc.date.available 2014-03-01T02:46:07Z
dc.date.issued 2009 en
dc.identifier.issn 1070-9878 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/32561
dc.subject Dielectric polarization en
dc.subject Interface en
dc.subject Nano-dielectric en
dc.subject Permittivity measurement en
dc.subject Surface en
dc.subject Water en
dc.subject.classification Engineering, Electrical & Electronic en
dc.subject.classification Physics, Applied en
dc.subject.other Crystalline powder en
dc.subject.other Dehydration process en
dc.subject.other Dielectric permittivities en
dc.subject.other Dielectric polarization en
dc.subject.other Dissipation factors en
dc.subject.other Effect of water en
dc.subject.other Function of frequency en
dc.subject.other High vacuum en
dc.subject.other Humidity levels en
dc.subject.other Induced polarization en
dc.subject.other Interface en
dc.subject.other Nano powders en
dc.subject.other Nanodielectrics en
dc.subject.other Powdered materials en
dc.subject.other Relative dielectric constant en
dc.subject.other TiO en
dc.subject.other Vacuum dehydration en
dc.subject.other Water types en
dc.subject.other XRD en
dc.subject.other Alumina en
dc.subject.other Calcination en
dc.subject.other Carbonate minerals en
dc.subject.other Dehydration en
dc.subject.other Dewatering en
dc.subject.other Dielectric materials en
dc.subject.other Oxide minerals en
dc.subject.other Particle size en
dc.subject.other Permittivity en
dc.subject.other Permittivity measurement en
dc.subject.other Polarization en
dc.subject.other Titanium dioxide en
dc.subject.other Vacuum en
dc.subject.other Vacuum applications en
dc.subject.other Water absorption en
dc.subject.other Phase interfaces en
dc.title Effect of water on permittivity of nanodielectrics exposed to the atmosphere en
heal.type conferenceItem en
heal.identifier.primary 10.1109/TDEI.2009.5361575 en
heal.identifier.secondary http://dx.doi.org/10.1109/TDEI.2009.5361575 en
heal.identifier.secondary 5361575 en
heal.language English en
heal.publicationDate 2009 en
heal.abstract Relative dielectric constant and dissipation factor (tan delta) values as a function of frequency have been measured for a variety of water types. The effect of water absorption on the permittivity properties of crystalline powders or nanopowders when exposed to various humidity levels is also examined. Powdered materials were characterized by XRD and were consisting of calcite (CaCO3), anatase, rutile (TiO2), gamma- and delta-alumina (Al2O3). The induced polarization changes in the materials by the applied dehydration process, i.e. either high vacuum of 10(-4) Pa (10(-6) mbar) drying, or calcination in air at temperatures of up to 600 degrees C, were investigated. The advantage offered by vacuum dehydration is that nano-dielectrics maintain their particle size and crystal integrity. en
heal.journalName IEEE Transactions on Dielectrics and Electrical Insulation en
dc.identifier.doi 10.1109/TDEI.2009.5361575 en
dc.identifier.isi ISI:000272796500009 en
dc.identifier.volume 16 en
dc.identifier.issue 6 en
dc.identifier.spage 1558 en
dc.identifier.epage 1565 en

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