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http://hdl.handle.net/10773/21983| Title: | Structural characterization of mixed conducting perovskites La(Ga,M)O3-δ ( M = Mn, Fe, Co, Ni) |
| Author: | Vyshatko, N.P. Kharton, V. Shaula, A.L. Naumovich, E.N. Marques, F.M.B. |
| Keywords: | Crystal structure Ionic conductivity Oxides X-ray diffraction Approximation theory Crystal structure Doping (additives) Ionic conduction Positive ions Transition metals X ray diffraction Structural characterization Perovskite |
| Issue Date: | Jan-2003 |
| Publisher: | Elsevier |
| Abstract: | Comparative analysis of the structure refinement results of perovskite-like LaGa0.5M0.5O3-δ (M = Mn, Fe, Co, Ni) and data on other LaGaO3-based phases, heavily doped with transition metal cations, shows that on doping the structural changes in these oxides follow common trends for the perovskite-type systems. The maximum ionic conductivity, observed in various perovskites when the tolerance factor values are approximately 0.96-0.97, was found to correlate with the transition from orthorhombic to rhombohedral structure and maximum lattice distortion. The perovskite unit cell distortion near the orthorhombic-rhombohedral phase boundary may hence play a positive role in the ionic transport processes. © 2002 Elsevier Science Ltd. All rights reserved. |
| Peer review: | yes |
| URI: | http://hdl.handle.net/10773/21983 |
| DOI: | 10.1016/S0025-5408(02)01050-4 |
| ISSN: | 0025-5408 |
| Appears in Collections: | CICECO - Artigos |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| MRB38_185.pdf | Article | 183.86 kB | Adobe PDF | View/Open |
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