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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F11%3A00438028%21RIV15-AV0-68081723
rdf:type
n8:Vysledek skos:Concept
dcterms: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
dcterms:title
Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties
skos:prefLabel
Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties
skos:notation
RIV/68081723:_____/11:00438028!RIV15-AV0-68081723
n3:aktivita
n18:Z
n3:aktivity
Z(AV0Z20410507)
n3:cisloPeriodika
11
n3:dodaniDat
n11:2015
n3:domaciTvurceVysledku
n6:6329446 n6:4343883
n3:druhVysledku
n13:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
205846
n3:idVysledku
RIV/68081723:_____/11:00438028
n3:jazykVysledku
n5:eng
n3:klicovaSlova
Iron nanoparticles; Ferrihydrite; Reduction; Hydrogen; Magnetic moment; Activation enthalpy
n3:klicoveSlovo
n10:Hydrogen n10:Ferrihydrite n10:Iron%20nanoparticles n10:Reduction n10:Activation%20enthalpy n10:Magnetic%20moment
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[25692578EEF8]
n3:nazevZdroje
Journal of Nanoparticle Research
n3:obor
n14:BM
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
5
n3:rokUplatneniVysledku
n11:2011
n3:svazekPeriodika
13
n3:tvurceVysledku
Schneeweiss, Oldřich Filip, J. Zbořil, R. David, Bohumil Mašláň, M.
n3:wos
000297351600012
n3:zamer
n16:AV0Z20410507
s:issn
1388-0764
s:numberOfPages
8
n17:doi
10.1007/s11051-011-0383-2