Abstract
Solid-state diffusion of native defects in some metal oxides takes place via highly mobile intermediate species that periodically exchange with lattice atoms. A mathematical model has been formulated to determine the key diffusion parameters from mesoscopic gas-solid diffusion measurements in the short-time limit. The model provides a straightforward analytical means to utilize standard isotope gas-solid exchange experiments to obtain parameters connected to diffusion length and net rate of defect formation at the surface. Application of the method to experimental data for oxygen self-diffusion in titanium dioxide suggests that under conditions where gas-solid exchange takes place through an especially clean surface, a fast-moving species mediates oxygen self-diffusion.
Original language | English (US) |
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Pages (from-to) | Q21-Q24 |
Journal | ECS Journal of Solid State Science and Technology |
Volume | 1 |
Issue number | 2 |
DOIs | |
State | Published - 2012 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials