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- Title
X-ray photoelectron study on Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>x</sub>Fe<sub>1-x</sub>O<sub>3-δ</sub> (BSCF: x = 0.2 and 0.8) ceramics annealed at different temperature and pO<sub>2</sub>.
- Authors
Jae-Il Jung; Edwards, Doreen D.
- Abstract
X-ray diffraction (XRD) and the X-ray photoelectron spectroscopy (XPS) were measured for the sintered BSCF ceramics (Ba0.5Sr0.5CoxFe1-xO3-δ, x = 0.2 and 0.8: BSCF5528 and BSCF5582, respectively), which were annealed at different temperatures (700 and 950 °C) and gases (O2 and Ar). The unit cell of the annealed BSCF5528 at 950 °C under Ar expanded by 0.8%, while contracting by 0.45% under O2. The cubic and rhombohedral phases coexist in the BSCF5582 annealed at 700 °C under O2. The XPS peak areas of lattice oxygen (O2-) in O1s, ∼528 eV, and the shoulder peak of Co2p/Ba3d in BSCF5582 (∼778 eV) increased significantly after being annealed in O2. The areas of the peaks for BaCO3 (87.9/ 90.2 eV) in Ba4d preferentially were shown to decrease in Ar and increase in O2.
- Subjects
X-ray photoelectron spectroscopy; CERAMICS; ANNEALING of metals; OXYGEN; GASES
- Publication
Journal of Materials Science, 2011, Vol 46, Issue 23, p7415
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-011-5704-4