Diffusion of H and D in TiO2: Suppression of Internal Fields by Isotope Exchange,
Abstract
Measurements of H and D diffusion in TiO2, using the isotope exchange technique described in the preceding paper, are reported. Use of this technique resulted in diffusion which was accurately described by Fick's law, as predicted theoretically, in sharp contrast to single ion diffusion, where dramatic departures from classical diffusion theory were observed. Ionic conductivity measurements are reported, which agree well with the bulk diffusion measurements, and permit extension of the temperature range of the measurements for c-axis diffusion from 125 to 750C, corresponding to a range of more than 4 orders of magnitude in D. The measured diffusion parameters were found to be essentially independent of sample purity, although it was observed that significant concentrations of lattice defects sharply inhibited H diffusion. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1974
- Accession Number
- AD0787669
Entities
People
- J. W. Deford
- O. W. Johnson
- S. H. Paek
Organizations
- University of Utah