| Autor: |
Nivoix, V., Perriat, P., Gillot, B. |
| Zdroj: |
Journal of Thermal Analysis and Calorimetry; March 2000, Vol. 59 Issue: 3 p847-858, 12p |
| Abstrakt: |
From a model for isothermal oxidation kinetics in nanosized ferrite spinels based on a diffusion-induced stress effect, the authors present a modeling of the DTG curves for the oxidation of Fe2+and Mo3+cations on octahedral sites of a molybdenum ferrite. This has been made by considering that the chemical diffusion coefficient is given by the relation $$\tilde D = D_o \exp \left( {\frac{{E'_{\text{a}} + pV_{\text{a}} }}{{RT}}} \right)$$ , when Dois a pre-exponential factor, Ea′an activation energy and Vaan activation energy induced by the oxidation. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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