Thermochimica Acta, Vol.254, 227-233, 1995
The Oxidation-Kinetics of Fev2O4 in the Range 200-580-Degrees-C
The oxidation kinetics of FeV2O4 were studied using isothermal and non-isothermal methods of analysis. The isothermal experimental data are described in terms of the Jander equation with E(a) = 141 kJ mol(-1). The non-isothermal analysis showed that the kinetics can be described in terms of three different overlapping processes. The first process, oxidation of the spinel to give a solid solution, is described in terms of a first-order nucleation mechanism, E(a) = 61 kJ mol(-1), and take place in the temperature range 180-380 degrees C. The second process, the oxidation of the solid solution, takes place from approximate to 360 degrees C and is described by a diffusion mechanism with E(a) = 249 kJ mol(-1). The third process, oxidation of the remaining spinel, is described by a first-order nucleation model with E(a) = 345 kJ mol(-1) and overlap with the second process. The reaction is completed at approximate to 580 degrees C.