Electron microscopy study of the cubic perovskite phase SrFe/sub 1-x/V/sub x/O/sub 2. 5+x/ (0. 05 less than or equal to x less than or equal to 0. 1)

Journal Article · Tue Dec 01 00:00:00 EST 1987 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(87)90249-0· OSTI ID:5421390

Nakayama, N; Takano, M; Inamura, S; Nakanishi, N; Kosuge, K

The oxygen-deficient cubic perovskite phase SrFe/sub 1-2/V/sub x/O/sub 2.5+x/ (0.05 less than or equal to x less than or equal to 0.10) quenched from 1473 K has been investigated by electron microscopy. Samples show a microdomain structure composed of ordered grains less than 20 nm. Oxygen vacancies from a brownmillerite-type superlattice in each microdomain, while six orientation variants have been observed within a particle; the oxygen vacancies in one domain are stringed along one of the six possible <110>/sub c/ directions of the cubic host lattice. The domain size decreases as x or oxygen content increases. Vacancy arrangements within the domains observed in high-resolution lattice images indicate that good structural coherence exists between microdomains and that a basic cubic perovskite skeleton is framed throughout a particle; they also suggest that vacancy content decreases in the boundary regions.

• Research Organization: Kyoto Univ., Japan
• OSTI ID: 5421390
• Journal Information: J. Solid State Chem.; (United States), Vol. 71:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON OXIDES
CRYSTAL STRUCTURE
PHASE STUDIES
STRONTIUM OXIDES
VANADIUM OXIDES
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
LATTICE PARAMETERS
POWDERS
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
DATA
DIFFRACTION
INFORMATION
IRON COMPOUNDS
MICROSCOPY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SCATTERING
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
360202* - Ceramics
Cermets
&amp; Refractories- Structure &amp; Phase Studies