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OPRAVIL, T. PTÁČEK, P. ŠOUKAL, F. BARTONÍČKOVÁ, E. WASSERBAUER, J.
Original Title
Solid-state synthesis of SrY2O4 and SrSm2O4
Type
journal article in Web of Science
Language
English
Original Abstract
The course of solid-state synthesis of SrY2O4 and SrSm2O4 is described in this work. The processes during the thermal treatment, the mechanism and kinetics, the reactivity with water and the thermal stability of products were investigated by thermal analysis, isothermal calorimetry, infrared spectroscopy and scanning electron microscopy. Since solid-state synthesis does not show any significant effect on DTA, the course of synthesis was observed by the expansion of specimen. The kinetics of formation of SrY2O4 and SrSm2O4 is driven by the rate of reaction of 2nd order (g(alpha) = (1 - alpha)(-1) - 1) and requires the E (a) of 450 and 918 kJ mol(-1), respectively. The heat released by the reaction of SrSm2O4 with water is significantly higher than that of SrY2O4. The introduction of Al2O3 to SrY2O4 led to the formation of monoclinic phase of Sr6Y2Al4O15. The hydraulic activity of these phases can be applied for the preparation of special inorganic cements.
Keywords
SrY2O4; SrSm2O4; Sr6Y2Al4O15; Kinetics; Hydrolysis; Thermal stability
Authors
OPRAVIL, T.; PTÁČEK, P.; ŠOUKAL, F.; BARTONÍČKOVÁ, E.; WASSERBAUER, J.
Released
1. 1. 2016
Publisher
SPRINGER
Location
VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISBN
1388-6150
Periodical
Journal of Thermal Analysis and Calorimetry
Year of study
123
Number
1
State
Hungary
Pages from
181
Pages to
194
Pages count
14
URL
https://link.springer.com/content/pdf/10.1007%2Fs10973.015-4950-0.pdf
BibTex
@article{BUT124264, author="Tomáš {Opravil} and Petr {Ptáček} and František {Šoukal} and Eva {Bartoníčková} and Jaromír {Wasserbauer}", title="Solid-state synthesis of SrY2O4 and SrSm2O4", journal="Journal of Thermal Analysis and Calorimetry", year="2016", volume="123", number="1", pages="181--194", doi="10.1007/s10973-015-4950-0", issn="1388-6150", url="https://link.springer.com/content/pdf/10.1007%2Fs10973.015-4950-0.pdf" }