Interfacial relaxation phenomena in particulate composites of epoxy resin with copper or iron particles

Tsangaris, GM; Kouloumbi, N; Kyvelidis, S

dc.contributor.author	Tsangaris, GM	en
dc.contributor.author	Kouloumbi, N	en
dc.contributor.author	Kyvelidis, S	en
dc.date.accessioned	2014-03-01T01:12:01Z
dc.date.available	2014-03-01T01:12:01Z
dc.date.issued	1996	en
dc.identifier.issn	0254-0584	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11921
dc.subject	Composites	en
dc.subject	Dielectrics	en
dc.subject	Interfacial phenomena	en
dc.subject	Metal fillers	en
dc.subject	Relaxation	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Activation energy	en
dc.subject.other	Copper	en
dc.subject.other	Dielectric materials	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Electric losses	en
dc.subject.other	Epoxy resins	en
dc.subject.other	Frequencies	en
dc.subject.other	Interfaces (materials)	en
dc.subject.other	Iron	en
dc.subject.other	Polarization	en
dc.subject.other	Powder metals	en
dc.subject.other	Thermal effects	en
dc.subject.other	Debye type relaxation	en
dc.subject.other	Maxwell-Wagner-Sillars polarization	en
dc.subject.other	Metal fillers	en
dc.subject.other	Relaxation frequency	en
dc.subject.other	Composite materials	en
dc.title	Interfacial relaxation phenomena in particulate composites of epoxy resin with copper or iron particles	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0254-0584(96)80063-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0254-0584(96)80063-0	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	Interfacial dielectric relaxations have been studied in composites made with epoxy resin and copper or iron particles. Over the temperature range reported (20-160 degrees C) relaxation peaks are formed in the 10-10(3) Hz frequency range. They are attributed to the Maxwell-Wagner-Sillars (MWS), or interfacial, polarization effect, created in heterogeneous dielectrics. The observed MWS loss peaks shift to lower frequencies if the content of the composites in the metal particles is increased. From the temperature dependence of relaxation frequency, the activation energy for the process is estimated to be 45 kJ mol(-1) (0.4 eV). Dielectric losses of the composites in the 10-10(3) Hz frequency range can be regarded as the sum of losses from a Debye-type relaxation and of the conductivity term sigma/omega. Interfacial dielectric losses are insignificant at high frequencies.	en
heal.publisher	ELSEVIER SCIENCE SA LAUSANNE	en
heal.journalName	Materials Chemistry and Physics	en
dc.identifier.doi	10.1016/0254-0584(96)80063-0	en
dc.identifier.isi	ISI:A1996UU37200007	en
dc.identifier.volume	44	en
dc.identifier.issue	3	en
dc.identifier.spage	245	en
dc.identifier.epage	250	en