Electronic Conduction in Pure and Chromium-doped Rutile at 1273 K
نویسندگان
چکیده
The symmetric chain Pt-TiO -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 to 1 atm. The isothermal variations of electronic conductivity of rutile doped with 1 to 5 % atoms Cr as a function of P 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 energy.
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تاریخ انتشار 2017