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  • Thermal behavior of highly crystalline epsilon-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) A oC, while for 28(2) nm only 755(10) A oC. 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 A oC and CO2 in the temperature range between 200 and 450 A oC.
  • Thermal behavior of highly crystalline epsilon-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) A oC, while for 28(2) nm only 755(10) A oC. 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 A oC and CO2 in the temperature range between 200 and 450 A oC. (en)
Title
  • Thermal stability of nanocrystalline epsilon-Fe2O3
  • Thermal stability of nanocrystalline epsilon-Fe2O3 (en)
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  • Thermal stability of nanocrystalline epsilon-Fe2O3
  • Thermal stability of nanocrystalline epsilon-Fe2O3 (en)
skos:notation
  • RIV/00216208:11310/14:10272018!RIV15-MSM-11310___
http://linked.open...avai/riv/aktivita
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  • I, P(GAP204/10/0035), Z(MSM0021620857)
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  • 1
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  • 50349
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  • RIV/00216208:11310/14:10272018
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  • infrared spectroscopy; evolved gas analysis; differential thermal analysis; thermogravimetry; X-ray powder diffraction; epsilon-Fe2O3 (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • HU - Maďarsko
http://linked.open...ontrolniKodProRIV
  • [20BBE3327141]
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  • Journal of Thermal Analysis and Calorimetry
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  • 117
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  • Nižňanský, Daniel
  • Lančok, Adriana
  • Brázda, Petr
  • Večerníková, Eva
  • Pližingrová, Eva
http://linked.open...ain/vavai/riv/wos
  • 000338120100010
http://linked.open...n/vavai/riv/zamer
issn
  • 1388-6150
number of pages
http://bibframe.org/vocab/doi
  • 10.1007/s10973-014-3711-9
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  • 11310
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