Determination of oxygen self-diffusion coefficient in polycrystalline Li2O by gas-phase analysis.
- 1 January 1980
- journal article
- Published by Taylor & Francis in Journal of Nuclear Science and Technology
- Vol. 17 (4) , 269-274
- https://doi.org/10.3327/jnst.17.269
Abstract
The self-diffusion coefficients of the oxygen ion in polycrystalline Li2O were determined in the range of 874~1,129°C by means of the gas-solid isotope exchange technique where the diffusion coefficient was calculated from the concentration variation of the tracer 18O in the diffusion atmosphere with assumption of grain-boundary enhanced diffusion. The determined oxygen self-diffusion coefficient was smaller than the previously reported lithium self-diffusion coefficient. The relative diffusivities of the cation and the anion were discussed with respect to the sublattice structure of the antifluorite cubic Li2O in comparison with the fluorite cubic crystals.Keywords
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