About: Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Natural ferrihydrite was used as the precursors for the preparation of the nanocrystalline alpha-Fe powder using heat treatment in hydrogen atmosphere. Transformation temperatures were estimated from the temperature dependences of magnetic moment. Structure and phase composition of the precursors and the final powders were characterized by X-ray diffraction and Mossbauer spectroscopy. Magnetic properties were characterized according to hysteresis loop parameters. The kinetics of the transformation was described using Avrami relation applied on the data of the isothermal time dependence of magnetic moment measurements and subsequently the activation enthalpy of transformation was estimated using Arrhenius plots of their parameters. Comparison of the changes of activation enthalpies derived from a different temperature ranges indicates effects of different processes on formation of alpha-Fe nanoparticles Natural ferrihydrite was used as the precursors for the preparation of the nanocrystalline alpha-Fe powder using heat treatment in hydrogen atmosphere. Transformation temperatures were estimated from the temperature dependences of magnetic moment. Structure and phase composition of the precursors and the final powders were characterized by X-ray diffraction and Mossbauer spectroscopy. Magnetic properties were characterized according to hysteresis loop parameters. The kinetics of the transformation was described using Avrami relation applied on the data of the isothermal time dependence of magnetic moment measurements and subsequently the activation enthalpy of transformation was estimated using Arrhenius plots of their parameters. Comparison of the changes of activation enthalpies derived from a different temperature ranges indicates effects of different processes on formation of alpha-Fe nanoparticles (en)
Title	Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties (en)
skos:prefLabel	Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties (en)
skos:notation	RIV/68081723:_____/11:00438028!RIV15-AV0-68081723
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z20410507)
http://linked.open...iv/cisloPeriodika	11
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	David, Bohumil Schneeweiss, Oldřich
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 fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	205846
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/11:00438028
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Iron nanoparticles; Ferrihydrite; Reduction; Hydrogen; Magnetic moment; Activation enthalpy (en)
http://linked.open.../riv/klicoveSlovo	Activation enthalpy Magnetic moment Ferrihydrite Iron nanoparticles Hydrogen Reduction
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[25692578EEF8]
http://linked.open...i/riv/nazevZdroje	Journal of Nanoparticle Research
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	13
http://linked.open...iv/tvurceVysledku	David, Bohumil Filip, J. Schneeweiss, Oldřich Mašláň, M. Zbořil, R.
http://linked.open...ain/vavai/riv/wos	000297351600012
http://linked.open...n/vavai/riv/zamer	Physical properties of advanced materials in relation to their microstructure and processing
issn	1388-0764
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s11051-011-0383-2

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