Resolution of overlapping peaks and the determination of kinetic parameters for the crystallization of multicomponent system from DTA or DSC curves: I. Non-isothermal kinetics

Diphasic aluminosilicate gels with two stage mullitization in temperature range of 1200–1300°C

“…(2) and presented in Table 5. To calculate the Avrami exponent for each of the two overlapped peaks in non-leached sample, the peaks were first resolved by the method described in our work, 37 and then the Avrami exponent was calculated. TEM micrograph of the non-leached sample heat-treated at 1260 • C is shown in Fig.…”

“…However, this method is not applicable for overlapped peaks, therefore, to determine the Avrami exponent n for each of the two overlapped peaks of NL sample, the separation of the peaks was made using computer resolving method, 37 which enables simultaneous evaluation of the sum of activation energy and Avrami exponent (E a × n).…”

Weibull Mixture Model for Modeling Nonisothermal Kinetics of Thermally Stimulated Solid-State Reactions: Application to Simulated and Real Kinetic Conversion Data

“…12 To separate the individual steps of overlapping processes, many methods have been proposed. [13][14][15][16][17][18] In the paper of Wagner et al, 15 the sum of two Gaussian functions were used for fitting exothermal peaks obtained through differential scanning calorimetry of amorphous semiconducting alloys. Naya et al 16 proposed the nth-degree polynomial logistic regression model for fitting the TGA curves.…”

“…The kinetic analysis of complex reactions, such as overlapping reactions, has received the attention of a great number of authors. − Overlapping reactions could be detected looking at the dependence of the activation energy on the conversion − In the paper of Wagner et al., the sum of two Gaussian functions were used for fitting exothermal peaks obtained through differential scanning calorimetry of amorphous semiconducting alloys. Naya et al proposed the n th-degree polynomial logistic regression model for fitting the TGA curves.…”