Artículo
Direct Comparison of Surface Crystal Growth Kinetics in Chalcogenide Glass Measured by Microscopy and DSC
Autor/es | Shánělová, Jana
Honcová, Pavla Málek, Jiří Perejón Pazo, Antonio Pérez Maqueda, Luis A. |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2023 |
Fecha de depósito | 2024-04-29 |
Publicado en |
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Resumen | Surface crystallization in fine powder Se70Te30 chalcogenide glass was studied by differential scanning calorimetry (DSC) and optical microscopy. A complex kinetic analysis of these experimental data reveals that the ... Surface crystallization in fine powder Se70Te30 chalcogenide glass was studied by differential scanning calorimetry (DSC) and optical microscopy. A complex kinetic analysis of these experimental data reveals that the contracting sphere mechanism (R3 model) is the rate determining step of crystal growth, and the conventional Johnson–Mehl–Avrami–Kolmogorov model cannot be used in this case. Moreover, it is clearly shown that the particle size distribution should be considered in crystallization studies. Actually, when the particle size effect is taken into account, the simulated DSC curves for the R3 model agree very well with the experimental data over the entire temperature range. The crystallization kinetics determined from the nonisothermal DSC data are consistent with previously reported isothermal crystallization data for the same powder fraction. The crystal growth rate calculated from isothermal and nonisothermal DSC data agrees very well with the microscopically measured surface and bulk crystal growth rate. |
Agencias financiadoras | Ministerio de Ciencia e Innovación (MICIN). España |
Identificador del proyecto | DC2021-121552-C21 |
Cita | Shánělová, J., Honcová, P., Málek, J., Perejón Pazo, A. y Pérez Maqueda, L.A. (2023). Direct Comparison of Surface Crystal Growth Kinetics in Chalcogenide Glass Measured by Microscopy and DSC. Journal of the American Ceramic Society, 106 (10), 6051-6061. https://doi.org/10.1111/jace.19204. |
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