About: Magnetic materials based on manganese–zinc ferrite with surface organized polyaniline coating

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Komposity ferritu zinku a manganu s polyanilinem byly připraveny oxidací anilinu peroxydvojsíranem amonným v přítomnosti ferritu. Různé reakční podmínky umožnily řídit tloušťku pokrytí mezi 50–250 nm. Spektra komplexní magnetické permeability ferritu o zůzné velikosti částic, 25–250 .mu.m, a jejich kompositů s polyanilinem byly studovány ve frekvenčním rozsahu 1 MHz–10 GHz. Tvorba polymerní p-polovodivé nanovrstvy na povrchu částic ferritu mění chaarkter frekvenční disperse magnetické permeability. Mezifázové efekty mezi MnZn ferritem a polyanilinovým nanofilmem jsou odpovědné za posuny rezonančního kmitočtu z oblasti MHz do GHz. (cs) Core–shell composites of manganese–zinc ferrite (MnZn) and polyaniline (PANI) have been prepared by the oxidation of aniline with ammonium peroxydisulfate in the presence of ferrite. The various reaction conditions allowed controlling the thickness of PANI coating, 50–250 nm. Complex magnetic permeability spectra of MnZn ferrite of various particles sizes, 25–250 .mu.m, and of their composites with PANI, have been studied in the frequency range 1 MHz–10 GHz. The formation of a polymer p-semiconducting nanolayer on the surface of a MnZn ferrite particle changes the character of the frequency dispersion of the permeability. The interfacial effects between MnZn ferrite and PANI nanofilm are responsible for the shifts of resonance frequency from MHz closer to GHz. Core–shell composites of manganese–zinc ferrite (MnZn) and polyaniline (PANI) have been prepared by the oxidation of aniline with ammonium peroxydisulfate in the presence of ferrite. The various reaction conditions allowed controlling the thickness of PANI coating, 50–250 nm. Complex magnetic permeability spectra of MnZn ferrite of various particles sizes, 25–250 .mu.m, and of their composites with PANI, have been studied in the frequency range 1 MHz–10 GHz. The formation of a polymer p-semiconducting nanolayer on the surface of a MnZn ferrite particle changes the character of the frequency dispersion of the permeability. The interfacial effects between MnZn ferrite and PANI nanofilm are responsible for the shifts of resonance frequency from MHz closer to GHz. (en)
Title	Magnetic materials based on manganese–zinc ferrite with surface organized polyaniline coating Magnetické materiály založené na feritech manganu a zinku s povrchově organizovaným polyanilinovým pokrytím (cs) Magnetic materials based on manganese–zinc ferrite with surface organized polyaniline coating (en)
skos:prefLabel	Magnetic materials based on manganese–zinc ferrite with surface organized polyaniline coating Magnetické materiály založené na feritech manganu a zinku s povrchově organizovaným polyanilinovým pokrytím (cs) Magnetic materials based on manganese–zinc ferrite with surface organized polyaniline coating (en)
skos:notation	RIV/61389013:_____/06:00031340!RIV06-AV0-61389013
http://linked.open.../vavai/riv/strany	155;165
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IAA4050313), Z(MSM7088352101)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2006
http://linked.open...aciTvurceVysledku	Stejskal, Jaroslav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav makromolekulární chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	483866
http://linked.open...ai/riv/idVysledku	RIV/61389013:_____/06:00031340
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	ferrite; coated particles; conducting polymer (en)
http://linked.open.../riv/klicoveSlovo	ferrite coated particles conducting polymer
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[80B1C2767A75]
http://linked.open...i/riv/nazevZdroje	Journal of Magnetism and Magnetic Materials
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Conducting polymer nanofilms
http://linked.open...UplatneniVysledku	2006
http://linked.open...v/svazekPeriodika	301
http://linked.open...iv/tvurceVysledku	Stejskal, Jaroslav Sáha, P. Sapurina, I. Kazantseva, N. E. Vilčáková, J. Bespyatykh, Y.
http://linked.open...n/vavai/riv/zamer	Multifunctional Composite Systems Based on Natural and Synthetic Polymers
issn	0304-8853
number of pages	11 (xsd:int)

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