Homogeneity Region of Strontium- and Magnesium-Containing LaGaO3at Temperatures between 1100° and 1500°C in Air

Autor:	Michael Rozumek, Fritz Aldinger, Linda Sauter, Peter Majewski
Rok vydání:	2003
Předmět:	Strontium chemistry Magnesium Scanning electron microscope Crystal chemistry Inorganic chemistry Homogeneity (physics) Materials Chemistry Ceramics and Composites chemistry.chemical_element Isothermal process Perovskite (structure) Solid solution
Zdroj:	Journal of the American Ceramic Society. 86:1940-1946
ISSN:	1551-2916 0002-7820
Popis:	Phase stability studies were performed within the quasi-ternary system LaGaO3-SrGaO2.5-“LaMgO2.5”. Emphasis was cast on the temperature dependence of the homogeneity region of La1−xSrxGa1−yMgyO3−δ perovskite solid solutions. Isothermal sections were determined at 1100°, 1250°, 1400°, and 1500°C in a static air atmosphere. The single-phase homogeneity region was found to considerably diminish with decreasing temperature, indicating a reduction of the solid solubility of Sr and Mg, and below 1100°C the doped perovskite becomes unstable. Consequently, the cubic perovskite phase was found to exist only at elevated temperatures and for high Sr and Mg amounts. Sample preparation was performed by the mixed-oxide process as well as by a modified combustion synthesis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4ec4dae8459ac50d112ad138e6d80208 https://doi.org/10.1111/j.1151-2916.2003.tb03585.x Zobrazit plný text záznamu