Analyse theorique des lois cinetiques couramment utilisees en thermoanalyse pour l'etude des reactions Solide-Gaz

Many authors use kinetic laws for the thermal analysis study of heterogeneous reactions which are essentially thermal decompositions. The authors carry out the theoretical analysis of six diffusion laws and show that only three of them are theoretically valid, because only these take into account all the relevant parameters. The definition of the word “diffusion” is discussed, and it is shown that the diffusion phenomena which often appear at the end of certain decompositions, cannot represent what really happens in the solid.