| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9761611 | Solid State Ionics | 2005 | 5 Pages |
Abstract
The aim of this work was to understand the nature of high conductivity of the perovskite fluoride KCaF3. A series of experiments were carried out using single crystal neutron diffraction. Fourier maps reveal a high degree of anisotropy in the Fâ ion vibrations. Comparison is made between harmonic and anharmonic models for thermal vibration. The results show that KCaF3 is a straightforward structure with a low concentration of defects. There is no significant occupation of interstitial sites and it is likely that the high conductivity is due to a small population of highly mobile vacancies. A model for the conduction mechanism is discussed.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
D.Z. Demetriou, C.R.A. Catlow, A.V. Chadwick, G.J. Mclntyre, I. Abrahams,