A Study of the Microstructure of La1 – xCaxMnO3 (x = 0.5, 0.8) Solid Solutions Full article
| Journal |
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques
ISSN: 1027-4510 , E-ISSN: 1819-7094 |
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| Output data | Year: 2009, Volume: 3, Number: 5, Pages: 756-760 Pages count : 5 DOI: 10.1134/S1027451009050164 | ||||
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Funding (1)
| 1 | The Ministry of Education and Science of the Russian Federation | 2.1.1/729 |
Abstract:
HREM and XPD methods are used to study the microstructure of La1- xCaxMnO3 perovskite-like oxides synthesized by pyrolysis of polymer-salt compositions. The XPD data show that the samples studied are single-phase solid solutions. Morphological transitions are observed in series of samples depending on the substitution parameter x. At 0 ≤ x ≤ 0.4 the samples can be characterized by rhombic symmetry (space group Pnmb); at 0.5 ≤ x ≤ 0.8 the symmetry increases to the tetragonal space group I4/mmm; at 0.9 ≤ x ≤ 1 the symmetry lowers to the monoclinic space group P1121. Heating of samples with x = 0.5 and 0.8 up to 1200°C in air does not lead to noticeable changes in the sample structure, which indicates their high thermal stability. When the La0.2Ca0.8MnO3 sample is heated to 1100°C in vacuum nanocrystalline states with particle disintegration into microphases of different structures form because of a partial decomposition of the solid solution. As a result, a system of Mn3O4 nanoparticles appears, which is coherently bound with the perovskite phase of a defective structure.
Cite:
Gerasimov E.Y.
, Zaikovskii V.I.
, Tsybulya S.V.
, Isupova L.A.
A Study of the Microstructure of La1 – xCaxMnO3 (x = 0.5, 0.8) Solid Solutions
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques. 2009. V.3. N5. P.756-760. DOI: 10.1134/S1027451009050164 WOS Scopus РИНЦ OpenAlex
A Study of the Microstructure of La1 – xCaxMnO3 (x = 0.5, 0.8) Solid Solutions
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques. 2009. V.3. N5. P.756-760. DOI: 10.1134/S1027451009050164 WOS Scopus РИНЦ OpenAlex
Original:
Герасимов Е.Ю.
, Зайковский В.И.
, Цыбуля С.В.
, Исупова Л.А.
Исследование микроструктуры твердых растворов La1 - xCaxMnO3 (x = 0.5, 0.8)
Поверхность. Рентгеновские, синхротронные и нейтронные исследования. 2009. №10. С.10-15. РИНЦ ANCAN
Исследование микроструктуры твердых растворов La1 - xCaxMnO3 (x = 0.5, 0.8)
Поверхность. Рентгеновские, синхротронные и нейтронные исследования. 2009. №10. С.10-15. РИНЦ ANCAN
Dates:
| Submitted: | Nov 27, 2008 |
| Published print: | Oct 1, 2009 |
| Published online: | Oct 13, 2009 |
Identifiers:
| Web of science: | WOS:000270744900016 |
| Scopus: | 2-s2.0-76349100249 |
| Elibrary: | 15300805 |
| OpenAlex: | W2003888236 |