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Título: | Understanding the crystallization mechanism of a wollastonite base glass using isoconversional, IKP methods and master plots |
Autor: | Pérez, Juan M. CSIC ORCID; Teixeira, Silvio R.; Rincón López, Jesús María CSIC ORCID; Romero, Maximina CSIC ORCID | Palabras clave: | Compensation effect DTA master plot wollastonite glass-ceramic |
Fecha de publicación: | sep-2012 | Editor: | John Wiley & Sons | Citación: | Journal of the American Ceramic Society, 95: 3441-3447 (2012) | Resumen: | The complex development of crystals found in the crystallization of a SiO2-Al2O3-CaO-Na2O glass has been explained using Differential Thermal Analysis. The crystal growth process has been studied using isoconversional, invariant kinetic parameters and master plots methods. The applied kinetic models have revealed activation energy values that are over 360 kJ/mol and 385 kJ/mol by employing the integral and differential kinetic methods, respectively. The crystallization process schedule that was previously observed by scanning electron microscopy has been corroborated in this study using the kinetic methods. The crystallization of wollastonite occurs through a complex two-stage mechanism, with early three-dimensional growth of crystals (A3 mechanism) on the surface of glass particles followed by one-dimensional growth of needles (A3/2 mechanism) towards the interior of grains. The results presented in this paper are in agreement with a previous paper that employed the Kissinger non-isothermal method and the Ligero approximation | Versión del editor: | http//dx.doi.org/0.1111/j.1551-2916.2012.05415.x | URI: | http://hdl.handle.net/10261/132195 | DOI: | 0.1111/j.1551-2916.2012.05415.x | ISSN: | 1551-2916 |
Aparece en las colecciones: | (IETCC) Artículos |
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Journal of the American Ceramic Society, 95, 2012, 3441-3447.pdf | Articulo principal | 605,29 kB | Adobe PDF | Visualizar/Abrir |
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