In situ high temperature XRD study of Sr-doped ceramics La0.95Sr0.05MnO3+δ
| Autor: | Moulay Tahar Sougrati, Oxana Rybchenko, Bernard Fraisse, V. D. Sedykh, D. I. Pchelina |
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| Přispěvatelé: | Lomonosov Moscow State University (MSU), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
In situ
Phase transition Materials science Analytical chemistry chemistry.chemical_element 02 engineering and technology 01 natural sciences Oxygen chemistry.chemical_compound Lanthanum manganite Lattice (order) 0103 physical sciences Materials Chemistry [CHIM]Chemical Sciences Thermal stability Ceramic 010306 general physics ComputingMilieux_MISCELLANEOUS Doping General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics chemistry visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Solid State Communications Solid State Communications, Elsevier, 2021, 336, pp.114401. ⟨10.1016/j.ssc.2021.114401⟩ |
| ISSN: | 0038-1098 |
| Popis: | Sr-doped lanthanum manganite La0.95Sr0.05MnO3+δ powder was obtained by sol-gel method. The effect of heating behavior and the effect of interstitial oxygen on structural properties of the LSMO ceramics were studied by XRD, including high-temperature in situ measurements (150–6500С). The as prepared powder is single-phase and has a rhombohedral structure (R-3c space group). In situ XRD results showed that heating under vacuum does not lead to a structure change; which remains rhombohedral. However, with an increase of temperature, the lattice parameters increase, reflecting a decrease of interstitial oxygen fraction. In addition, rhombohedral angle α decreases, which indicates that the lattice tends to cubic. Comparison of the studied sample with the La0.95Sr0.05MnO3 annealed in vacuum under special conditions has been carried out. Thermal stability of the material under heating and vacuum, which did not lead to the expected phase transition, was revealed. The necessary conditions for obtaining oxygen stoichiometry are given in work. |
| Databáze: | OpenAIRE |
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