Modeling of the DTG Curves for Oxidation of a Nanosized Molybdenum Ferrite Coupling Mechanics and Diffusion期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Modeling of the DTG Curves for Oxidation of a Nanosized Molybdenum Ferrite Coupling Mechanics and Diffusion

Authors:	V Nivoix P Perriat B Gillot

Institution:	(1) Université de Rouen, LASTSM, IUT, 76821 Mont Saint Aignan Cedex, France;(2) INSA de Lyon, GEMPPM-UMR CNRS 5510, 20, avenue Albert Einstein, 69621 Villeurbanne Cedex, France;(3) Laboratoire de Recherches sur la Réactivité des Solides, UMR CNRS 5613, 9, avenue Alain Savary, BP, 47870-21078 Dijon Cedex, France

Abstract:	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 D _o is a pre-exponential factor, E _a ^′ an activation energy and V _a an activation energy induced by the oxidation. This revised version was published online in July 2006 with corrections to the Cover Date.

Keywords:	derivative thermogravimetry diffusion-induced stress modeling molybdenum ferrite oxidation kinetics
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