Abstract
Typical integral and differential methods for the kinetic analysis of solid state reactions by thermal analysis have been examined based on the results obtained theoretically from assumed conditions (kinetic equation, parameters, etc.), giving the following results.
(1) The integral method (ln[g(α)] vs. 1/T plots) will be inapplicable to the analysis of the reaction, of which mechanism may be altered in the course of the reaction process, or of which beginning temperature can not be evidently regarded as 0K, as in the case of the decomposition reaction under self-generating gas.
(2) In order to determine the kinetic equation and parameters of the reaction uniquely, it is necessary to analyze multiple data obtained under such conditions as the reaction proceeds at different temperature ranges, i. e. under different heating rates or different particle sizes.
(3) The above results indicate that the application of the differential method (ln[(dα/dT)/f(α)] vs. 1/T plots) under different heating rates will be recommended.
