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Phase relations in the Ba–Sr–Co–Fe–O system at 1273 K in air
Author(s) -
Yáng Zhèn,
Harvey Ashley S.,
Infortuna Anna,
Gauckler Ludwig J.
Publication year - 2009
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889809002040
Subject(s) - perovskite (structure) , phase (matter) , hexagonal crystal system , crystallography , diffraction , materials science , solid state , analytical chemistry (journal) , x ray crystallography , mineralogy , chemistry , physics , organic chemistry , chromatography , optics
Selected compositions of the Ba–Sr–Co–Fe–O system were synthesized from powders by the solid‐state reaction method. Samples were equilibrated at 1273 K for 36 000 s in air. The resulting powders were characterized by X‐ray diffraction (XRD) at room temperature and by high‐temperature in situ XRD. The phases present in the Ba x Sr 1− x Co y Fe 1− y O 3−δ system are outlined for 1273 K in air. For most of the quaternary compositions, the cubic perovskite is formed, except for the compositions with x = 1 (excluding y = 0.4), y = 1 and x , y = 0.8, where the phases mainly show hexagonal distortions, and x, y = 0, for which a predominant cubic phase is mixed with other phases.