Anion ordering in aged stabilized bismuth oxide

Neutron diffraction was performed on samples of the oxygen ion conductor (Bi 2O 3) 0.80(Er 2O 3) 0.20. Results revealed a structural change in an “aged” sample, which had been annealed at 500 °C with resulting oxygen ion conductivity degradation. The essential change is the displacement of nearly al...

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Bibliographic Details
Published inMaterials letters Vol. 22; no. 5; pp. 215 - 219
Main Authors Jiang, N., Buchanan, R.M., Stevenson, D.A., Nix, W.D., Li, Ji-Zhou, Yang, Ji-Lian
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 1995
Elsevier
Subjects
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Inorganic compounds
Physics
Structure of solids and liquids; crystallography
Structure of specific crystalline solids
Water, oxides, hydroxides, peroxides
Inorganic compounds
Neutron diffraction
Stabilization
Ternary compounds
Transition element compounds
Ionic conductivity
Ionic conductors
Bismuth oxides
Rare earth compounds
Experimental study
Order disorder
Structural models
Aging
Erbium oxides
Thermal annealing
Crystal structure
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Summary:Neutron diffraction was performed on samples of the oxygen ion conductor (Bi 2O 3) 0.80(Er 2O 3) 0.20. Results revealed a structural change in an “aged” sample, which had been annealed at 500 °C with resulting oxygen ion conductivity degradation. The essential change is the displacement of nearly all anions from tetrahedral 8c sites to 32f sites along 〈111〉 directions. Taking this displacement into account, a structural model for oxide vacancy ordering is proposed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0167-577X
1873-4979
DOI:10.1016/0167-577X(95)00271-5