Self-diffusion of oxygen in single crystal alumina
- 1 August 1980
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 73 (3) , 1410-1412
- https://doi.org/10.1063/1.440201
Abstract
The self‐diffusion coefficient of oxygen in (polished slices of a Verneuil) single‐crystal alumina was determined in the temperature range 1500–1770 °C by means of the gas–solid isotope exchange technique. The results were represented by D=1.12×103 exp (−155×103/RT) cm2/s. The activation energy was interpreted to be for intrinsic diffusion. By comparison of the results with the oxygen self‐diffusion coefficients previously reported for crushed particles of a Verneuil alumina and a vapor‐grown alumina, the extrinsic diffusion exhibited by the crushed particles was confirmed to be due to a dislocation enhancement process.Keywords
This publication has 4 references indexed in Scilit:
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