Anion Diffusion in α‐Cr2O3
- 1 February 1965
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 48 (2) , 70-75
- https://doi.org/10.1111/j.1151-2916.1965.tb11802.x
Abstract
Oxygen‐18 exchange between gaseous oxygen, held at a pressure of 125 mm Hg in a Pt10Rh chamber, and spheres of α‐Cr2O3 containing three or less grains was determined from 1100° to 1450°C. Isotope equilibrium on crystal surfaces appears to be quickly established, and the rate‐determining factor is self‐diffusion conforming to the relation D = 15.9 exp(‐101,000/ RT) cm2sec−1. Changing sphere diameters caused no detectable variation in diffusion coefficients. Anions are the much slower diffusing species in this oxide.Keywords
This publication has 14 references indexed in Scilit:
- Oxidation of chromium at 890°–1200°CCorrosion Science, 1963
- Direct Observation of the Oxidation of Aluminum Single-Crystal SurfacesJournal of Applied Physics, 1963
- Effect Of Grain Boundaries on Diffusion‐Controlled Processes in Aluminum OxideJournal of the American Ceramic Society, 1963
- Cation Diffusion in Cr[sub 2]O[sub 3]Journal of the Electrochemical Society, 1961
- The Volatilization of Chromium OxideJournal of the Electrochemical Society, 1961
- Oxygen Mobility in Polycrystalline NiCr2O4 and α‐Fe2O3Journal of the American Ceramic Society, 1960
- Investigation of the processes of iron and chromium diffusion in the spinels NiCr2O4 and NiAl2O4 using Fe59 and Cr51Atomic Energy, 1958
- Initial Sintering of Alumina and HematiteJournal of the American Ceramic Society, 1958
- Selbstdiffusion und Reaktion in Oxyd- und Spinellsystemen.Zeitschrift für Physikalische Chemie, 1956
- Study of the Initial Stages of Sintering Solids by Viscous Flow, Evaporation-Condensation, and Self-DiffusionJournal of Applied Physics, 1955