The diffusion of barium in magnesium oxide
- 1 November 1967
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 16 (143) , 1039-1048
- https://doi.org/10.1080/14786436708229692
Abstract
Measurements of the diffusion of Ba in single crystal MgO indicate that dislocations can have a strong influence on diffusion coefficients in the temperature range 1000°c-1700°C. Dislocation densities calculated from these coefficients agree with values obtained from photomicrographs. The equations for lattice diffusion and dislocation-influenced diffusion, respectively, are: and where k is Boltzmann's constant in ev/°K and T is the absolute temperature. The bearing of this result on a previously postulated correlation between the activation energy and the ratio of the radius to the electronic polarizability of the diffusing ion is discussed.Keywords
This publication has 14 references indexed in Scilit:
- Diffusion of Be in MgOThe Journal of Chemical Physics, 1966
- The diffusion of calcium in magnesium oxidePhilosophical Magazine, 1966
- Diffusion of Zn2+ in Single-Crystal MgOThe Journal of Chemical Physics, 1965
- X-Ray Topography of Decorated Dislocations in Magnesium OxideJournal of Applied Physics, 1965
- Impurity precipitates in magnesium oxidePhilosophical Magazine, 1963
- Strain-Enhanced Diffusion in Metals. II. Dislocation and Grain-Boundary Short-Circuiting ModelsJournal of Applied Physics, 1963
- Identification of Precipitates on Grown-In Dislocations in MgOJournal of Applied Physics, 1963
- Charged Dislocations in Ionic CrystalsJournal of Applied Physics, 1961
- On the role of dislocations in bulk diffusionActa Metallurgica, 1957
- Interstitial Atomic Diffusion CoefficientsPhysical Review B, 1949