Synthesis and characterization of brownmillerite SrFeO{sub 2.5} in nanostructured form
Journal Article
·
· AIP Conference Proceedings
- Crystal Growth Centre, Anna University, Chennai-600 025 (India)
Synthesis of bulk polycrystalline and nanocrystalline oxygen-deficient SrFeO{sub 2.5} compounds, with potential applications as oxygen membranes, has been explored by chemical route to optimize an easy and reproducible method for high yield. The structure of the samples was investigated by X-ray powder diffraction followed by structural refinement. Both bulk and nanocrystalline SrFeO{sub 2.5} crystallize in Imma space group. X-ray powder diffraction pattern corresponds to the brownmillerite structure in which the Fe cations exist in an octahedral or tetrahedral configuration in alternate layers along the b axis. Brunauer−Emmett−Teller (BET) surface area is found to be 0.40m{sup 2}/g and 14 m{sup 2}/g for bulk and nanocrystalline SrFeO{sub 2.5} respectively. The morphology of these materials was also investigated by scanning electron microscopy and transmission electron microscopy.
- OSTI ID:
- 22490221
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1665; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATIONS
FERRITES
ION MICROPROBE ANALYSIS
MEMBRANES
MORPHOLOGY
NANOSTRUCTURES
OXYGEN
POLYCRYSTALS
SCANNING ELECTRON MICROSCOPY
STRONTIUM COMPOUNDS
SURFACE AREA
SYNTHESIS
TETRAGONAL LATTICES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATIONS
FERRITES
ION MICROPROBE ANALYSIS
MEMBRANES
MORPHOLOGY
NANOSTRUCTURES
OXYGEN
POLYCRYSTALS
SCANNING ELECTRON MICROSCOPY
STRONTIUM COMPOUNDS
SURFACE AREA
SYNTHESIS
TETRAGONAL LATTICES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION