ELECTRONIC CONDUCTION IN PURE AND CHROMIUM-DOPED RUTILE AT 1273 K
- 1 February 1986
- journal article
- Published by EDP Sciences in Le Journal de Physique Colloques
- Vol. 47 (C1) , C1-819
- https://doi.org/10.1051/jphyscol:19861125
Abstract
The symmetric chain Pt-TiO2-Pt was studied by means of complex impedance spectroscopy at T = 1273 K for pure and chromium-doped rutile in the partial pressure of oxygen range from 10-12 to 1 atm. The isothermal variations of electronic conductivity of rutile doped with 1 to 5 % atoms Cr as a function of P02 were interpreted in terms of point defects by the model of mixed-valence chromium. The comparative study of pure and doped rutile permits us more particularly to determine the different defect equilibria constants, the electronic mobility, the band gap and the acceptor-chromium ionization energyKeywords
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