Phase diagram studies in the quasi binary systems LaMnO3–SrMnO3 and LaMnO3–CaMnO3

Autor:	Peter Majewski, Fritz Aldinger, Michael Rozumek, Lars Epple, Heike Schluckwerder
Přispěvatelé:	Epple, Lars, Rozumek, Michael, Schluckwerder, Heike, Aldinger, Fritz
Rok vydání:	2000
Předmět:	Materials science Spinodal decomposition Mechanical Engineering Analytical chemistry Binary number Thermodynamics Trigonal crystal system Condensed Matter Physics Decomposition Mechanics of Materials General Materials Science Orthorhombic crystal system Phase diagram Solid solution
Zdroj:	Journal of Materials Research. 15:1161-1166
ISSN:	2044-5326 0884-2914
Popis:	The quasi binary systems LaMnO3–SrMnO3 and LaMnO3–CaMnO3 were studied. Both systems show a miscibility gap at intermediate La:Sr and La:Ca ratios below about 1400 °C in air. This phenomenon causes the decomposition of single-phase (La,Sr)MnO3−x and (La,Ca)MnO3−x solid solution into La-rich SrMnO3−x + Sr-rich LaMnO3−x and La-rich CaMnO3−x + Ca-rich LaMnO3−x at lower temperatures, respectively. At 1400 °C in the system LaMnO3–SrMnO3, a structure transformation of (La,Sr)MnO3 from orthorhombic to rhombohedral with increasing Sr content was not observed, and the structure of La0.7Sr0.3MnO3 was determined to be orthorhombic with a = 0.54927 ± 0.0009 nm, b = 0.54582 ± 0.0009 nm, and c 4 0.76772 ± 0.0034 nm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0a88a67897ac744c1419d3ce4d4b6c0 https://doi.org/10.1557/jmr.2000.0164 Zobrazit plný text záznamu Full text from SpringerLink