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

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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 Mössbauer spektroskopie. 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 Mössbauer spektroskopie. 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 precursor: kinetics and properties Iron nanoparticles prepared from natural ferrihydrite precursor: kinetics and properties (en)
skos:prefLabel	Iron nanoparticles prepared from natural ferrihydrite precursor: kinetics and properties Iron nanoparticles prepared from natural ferrihydrite precursor: kinetics and properties (en)
skos:notation	RIV/61989592:15310/11:33118136!RIV12-MSM-15310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(1M0512), P(GA106/08/1440)
http://linked.open...iv/cisloPeriodika	11
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Zbořil, Radek Filip, Jan Mašláň, Miroslav
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	Univerzita Palackého v Olomouci / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	205845
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/11:33118136
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 Ferrihydrite Iron nanoparticles Magnetic moment Reduction Hydrogen
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[2BD3E219FAE5]
http://linked.open...i/riv/nazevZdroje	Journal of Nanoparticle Research
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Research center of powdered nanomaterials Iron and iron oxide nanoparticles with applications in the magnetic separation processes
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	13
http://linked.open...iv/tvurceVysledku	David, Bohumil Filip, Jan Schneeweiss, Oldřich Zbořil, Radek Mašláň, Miroslav
http://linked.open...ain/vavai/riv/wos	000297351600012
issn	1388-0764
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s11051-011-0383-2
http://localhost/t...ganizacniJednotka	15310

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