Chemical diffusion in polycrystalline calcium-doped lanthanum chromites
Journal Article
·
· Journal of Solid State Chemistry
- Tokyo Gas Co., Ltd. (Japan)
The chemical diffusion coefficient of polycrystalline calcium-doped lanthanum chromites, La{sub 1-x}Ca{sub x}CrO{sub 3-{delta}}, was measured as a function of oxygen partial pressure, composition, and temperature by means of electrical conductivity relaxation. The measured chemical diffusivity increased with increasing oxygen vacancy concentration, the mechanism of which was discussed in light of defect chemical equilibrium. The derived vacancy diffusion coefficient was independent of the vacancy concentration, suggesting that oxygen vacancies were randomly distributed.
- OSTI ID:
- 508680
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 115; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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