Simultaneous DSC-TGA-MS analyses of RE.sub.2./sub.O.sub.3./sub. compounds for growth multicomponent oxides

0581882 - FZÚ 2024 CZ eng A - Abstrakt
Král, Robert - Zemenová, Petra - Falvey, Alexandra - Vaněček, Vojtěch - Bystřický, Aleš - Pejchal, Jan - Nikl, Martin
Simultaneous DSC-TGA-MS analyses of RE₂O₃ compounds for growth multicomponent oxides.
Book of Abstracts of the 32st Joint Seminar Development of Materials Science in Research and Education (DMSRE). Praha: Institute of Physics of the Czech Academy of Sciences, 2023 - (Kožíšek, Z.; Král, R.; Zemanová, P.). s. 42-42. ISBN 978-80-907237-4-0.
[DMSRE seminar: Development of Materials Science in Research and Education (DMSRE) /32./. 04.09.2023-08.09.2023, Pavlov]
Institucionální podpora: RVO:68378271
Klíčová slova: thermal analysis * mass spectrometry * rare earth sesquioxides, * crystal growth * scintillators
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
https://dms.fzu.cz/32/downloads/DMSRE2023_absbook.pdf

This contribution is focused on the study of the thermal properties of rare earth oxides, e.g. lanthanum oxide (La2O3), scandium oxide (Sc2O3), gadolinium oxide (Gd2O3), etc., which are often used as raw materials in the preparation of crystals of multicomponent oxides based on garnets and perovskites. The aim of this work is to study the purity of the starting materials and to determine the optimal conditions for their treatment and storage. Such goals were achieved using simultaneous thermoanalytical methods consisting of differential scanning calorimetry (DSC), thermogravimetry (TGA), and mass spectrometry (MS). In this way one can record changes in sample(s) regarding: (i) heat flow e.g. exo- and endo-thermic effects (e.g. phase transitions, reactions, etc.), (ii) mass change (decomposition, reactions, etc.), and (iii) detection of evolved gases and their fragments. Obtained results will be presented and discussed.

Trvalý link: https://hdl.handle.net/11104/0350018