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Thermal stability of nanocrystalline ε-Fe2O3
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SYSNO ASEP 0429198 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Thermal stability of nanocrystalline ε-Fe2O3 Author(s) Brázda, Petr (UACH-T)
Večerníková, Eva (UACH-T) SAI
Pližingrová, Eva (UACH-T) SAI, ORCID
Lančok, Adriana (UACH-T) ORCID, RID, SAI
Nižňanský, D. (CZ)Source Title Journal of Thermal Analysis and Calorimetry. - : Akadémiai Kiadó - ISSN 1388-6150
Roč. 117, č. 1 (2014), s. 85-91Number of pages 7 s. Language eng - English Country HU - Hungary Keywords ε-Fe2O3 ; Differential thermal analysis ; Evolved gas analysis ; Infrared spectroscopy ; Thermogravimetry ; X-ray powder diffraction Subject RIV CA - Inorganic Chemistry R&D Projects GAP204/10/0035 GA ČR - Czech Science Foundation (CSF) Institutional support UACH-T - RVO:61388980 UT WOS 000338120100010 EID SCOPUS 84904512866 DOI 10.1007/s10973-014-3711-9 Annotation 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. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2015
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