Effect of water on permittivity of nanodielectrics exposed to the atmosphere

Dervos, CT; Mergos, JA; Skafidas, PD; Athanassopoulou, MD; Vassiliou, P

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.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	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