Interface states and MWS polarization contributions to the dielectric response of low voltage ZnO varistor

Tsonos, C; Kanapitsas, A; Triantis, D; Anastasiadis, C; Stavrakas, I; Pissis, P; Neagu, E

dc.contributor.author	Tsonos, C	en
dc.contributor.author	Kanapitsas, A	en
dc.contributor.author	Triantis, D	en
dc.contributor.author	Anastasiadis, C	en
dc.contributor.author	Stavrakas, I	en
dc.contributor.author	Pissis, P	en
dc.contributor.author	Neagu, E	en
dc.date.accessioned	2014-03-01T01:35:53Z
dc.date.available	2014-03-01T01:35:53Z
dc.date.issued	2011	en
dc.identifier.issn	02728842	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21235
dc.subject	B. Grain boundaries	en
dc.subject	B. Interfaces	en
dc.subject	C. Dielectric properties	en
dc.subject	D. ZnO	en
dc.subject.other	B. Grain boundaries	en
dc.subject.other	B. Interfaces	en
dc.subject.other	Block models	en
dc.subject.other	Bulk traps	en
dc.subject.other	C. Dielectric properties	en
dc.subject.other	Davidson	en
dc.subject.other	Dielectric relaxation spectroscopy	en
dc.subject.other	Dielectric response	en
dc.subject.other	Interface state	en
dc.subject.other	Interface states density	en
dc.subject.other	Intergranular	en
dc.subject.other	Low voltages	en
dc.subject.other	Microregions	en
dc.subject.other	Relaxation mechanism	en
dc.subject.other	Temperature range	en
dc.subject.other	Temperature regions	en
dc.subject.other	Thermally stimulated depolarization currents	en
dc.subject.other	ZnO	en
dc.subject.other	ZnO varistors	en
dc.subject.other	Dielectric properties	en
dc.subject.other	Grain boundaries	en
dc.subject.other	Grain size and shape	en
dc.subject.other	Polarization	en
dc.subject.other	Spectroscopy	en
dc.subject.other	Varistors	en
dc.subject.other	Zinc oxide	en
dc.title	Interface states and MWS polarization contributions to the dielectric response of low voltage ZnO varistor	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ceramint.2010.08.036	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ceramint.2010.08.036	en
heal.publicationDate	2011	en
heal.abstract	The main purpose of this work is to study the dielectric response of commercial low voltage ZnO varistors by means of dielectric relaxation spectroscopy (DRS) and thermally stimulated depolarization currents (TSDC) in a wide temperature range. Four relaxation processes have been studied here and all of them demonstrate Cole-Davidson behaviour. The first two faster relaxation mechanisms are known processes in ZnO varistors and those are related to the ZnO bulk traps. The next one faster relaxation mechanism attributed to the MWS polarization which should be related to the intergranular Bi-rich microregions. The remaining slower relaxation mechanism is associated to the grain boundaries interfaces. Based on the block model for the ZnO varistor a gradual reduction in the total depletion width is observed at a temperature about 330 K, which can be considered that is due to the gradual decrease of the interface states density at this temperature region. © 2010 Elsevier Ltd and Techna Group S.r.l.	en
heal.journalName	Ceramics International	en
dc.identifier.doi	10.1016/j.ceramint.2010.08.036	en
dc.identifier.volume	37	en
dc.identifier.issue	1	en
dc.identifier.spage	207	en
dc.identifier.epage	214	en