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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F14%3A00429198%21RIV15-GA0-61388980
rdf:type
skos:Concept n12:Vysledek
dcterms:description
Thermal behavior of highly crystalline ε-Fe2O3 nanoparticles of different apparent crystallite sizes was characterized using thermogravimetry, differential thermal analysis, and analysis of evolved gas by mass spectrometry. Phase composition of the samples was monitored ex situ by X-ray powder diffraction. The results show that the thermal stability of this metastable iron oxide polymorph decreases with increasing particle size. For the particle diameter of 19(2) nm, the transformation temperature was equal to 794(5) °C, while for 28(2) nm only 755(10) °C. Surface of the nanoparticles contained adsorbed water and carbon dioxide. Elimination of these species proceeds in two steps. Water is removed at temperatures below 200 °C and CO2 in the temperature range between 200 and 450 °C. Thermal behavior of highly crystalline ε-Fe2O3 nanoparticles of different apparent crystallite sizes was characterized using thermogravimetry, differential thermal analysis, and analysis of evolved gas by mass spectrometry. Phase composition of the samples was monitored ex situ by X-ray powder diffraction. The results show that the thermal stability of this metastable iron oxide polymorph decreases with increasing particle size. For the particle diameter of 19(2) nm, the transformation temperature was equal to 794(5) °C, while for 28(2) nm only 755(10) °C. Surface of the nanoparticles contained adsorbed water and carbon dioxide. Elimination of these species proceeds in two steps. Water is removed at temperatures below 200 °C and CO2 in the temperature range between 200 and 450 °C.
dcterms:title
Thermal stability of nanocrystalline ε-Fe2O3 Thermal stability of nanocrystalline ε-Fe2O3
skos:prefLabel
Thermal stability of nanocrystalline ε-Fe2O3 Thermal stability of nanocrystalline ε-Fe2O3
skos:notation
RIV/61388980:_____/14:00429198!RIV15-GA0-61388980
n3:aktivita
n10:I n10:P
n3:aktivity
I, P(GAP204/10/0035)
n3:cisloPeriodika
1
n3:dodaniDat
n11:2015
n3:domaciTvurceVysledku
n5:2049937 n5:2445115 n5:4725328 n5:2204606
n3:druhVysledku
n9:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
50350
n3:idVysledku
RIV/61388980:_____/14:00429198
n3:jazykVysledku
n15:eng
n3:klicovaSlova
ε-Fe2O3; Differential thermal analysis; Evolved gas analysis; Infrared spectroscopy; Thermogravimetry; X-ray powder diffraction
n3:klicoveSlovo
n4:%CE%B5-Fe2O3 n4:X-ray%20powder%20diffraction n4:Evolved%20gas%20analysis n4:Thermogravimetry n4:Differential%20thermal%20analysis n4:Infrared%20spectroscopy
n3:kodStatuVydavatele
HU - Maďarsko
n3:kontrolniKodProRIV
[3B0F9DF7C2CA]
n3:nazevZdroje
Journal of Thermal Analysis and Calorimetry
n3:obor
n17:CA
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
5
n3:projekt
n16:GAP204%2F10%2F0035
n3:rokUplatneniVysledku
n11:2014
n3:svazekPeriodika
117
n3:tvurceVysledku
Nižňanský, D. Brázda, Petr Večerníková, Eva Pližingrová, Eva Lančok, Adriana
n3:wos
000338120100010
s:issn
1388-6150
s:numberOfPages
7
n18:doi
10.1007/s10973-014-3711-9