A Promising approach to the kinetics of crystallization processes: The sample controlled thermal analysis |
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| Authors: | Antonio Perejón Pedro E. Sánchez‐Jiménez José M. Criado Luis A. Pérez‐Maqueda |
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| Affiliation: | 1. Instituto de Ciencia de Materiales de Sevilla, C.S.I.C.‐ Universidad de Sevilla, Sevilla, Spain;2. Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Sevilla, Spain |
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| Abstract: | ![]()
Constant Rate Thermal Analysis (CRTA) method implies controlling the temperature in such a way that the reaction rate is maintained constant all over the process. This method allows determining simultaneously both the kinetic parameters and the kinetic model from a single experiment as the shape of the CRTA α‐T curves strongly depends on the kinetic model. CRTA method has been developed in the market only for thermogravimetric and thermodilatometric systems and, therefore, its use has been limited until now to the kinetic study of processes involving changes in mass or size of the samples, respectively. To overcome this obstacle, a method has been developed in this work for using the DSC signal for controlling the process rate in such a way that CRTA would be applied to the kinetic analysis of either phase transformations or crystallizations. The advantages of CRTA for performing the kinetics of crystallization processes have been here successfully demonstrated for the first time after selecting the crystallization of zirconia gel as test reaction. |
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| Keywords: | crystals/crystallization differential thermal analysis kinetics reaction rate zirconia |
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