The ionic conductivity was measured and, using these data, the diffusivity (table 5) was then deduced from the Nernst-Einstein equation.
Determination of the Coefficients of O Diffusion in Metal Oxides by an EMF Method. Elyutin, V.P., Lenskaya, T.G., Pavlov, Y.A., Polyakov, V.P.: Doklady Akademii Nauk SSSR, 1971, 199[1], 62-5
Table 5
Arrhenius parameters for O diffusion in TiO2
Material | Temperature (C) | PO2(atm) | Do(cm2/s) | E(kcal/mol) |
TiO2 | 900-1000 | 0.21-1.0 | 2.88 x 10-1 | 53.2 |
TiO2 | 710-1300 | 10-5-1.0 | 2.0 x 10-3 | 60.0 |
TiO2 | 860-1025 | 0.5 | 1.1 | 73.0 |
TiO2-2mol%Fe2O3 | 900-1000 | 0.21-1.0 | 5.0 | 55.3 |
TiO2-2mol%Al2O3 | 900-1000 | 0.21-1.0 | 4.68 | 55.6 |