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Título: | Optimization of the nucleating agent content for the obtaining of transparent fluormica glass-ceramics |
Autor: | Ariane, Khalissa; Tamayo Hernando, Aitana CSIC ORCID CVN; Chorfa, Abdellah; Rubio Alonso, Fausto CSIC ORCID ; Rubio Alonso, Juan CSIC ORCID | Palabras clave: | Glass-ceramic Crystallization kinetics P2O5 Transmittance Mica |
Fecha de publicación: | 10-feb-2023 | Editor: | Elsevier | Citación: | Ceramics International 49 (2023) 9826–9838 | Resumen: | [EN] The crystallization behaviours, mechanical and optical properties of fluormica glass-ceramic system without and with P2O5 as nucleating agent are studied. The crystallization mechanism of fluor-phlogopite (KMg3(Si3AlO10)F2) without P2O5 oxide represented one-dimensional surface crystallization with a fixed number of nuclei, and with the addition of P2O5, the mechanism tends to two-dimensional bulk crystallization with a constant nucleation rate being the most predominant phase, forsterite crystals (Mg2SiO4). The base glasses had the spinodal phase separation, which coarsened considerably by increasing P2O5 content. P2O5 had a strong influence on the microstructure and morphology of this type of glass-ceramic. The addition of small amount of P2O5 (1.0 mol%) to these glass-ceramic changed the microstructure from dendritic growth having leaf-like feature to a flower-like morphology of the crystal phase. Glass-ceramic without P2O5 produces yellowish to colourless transparent glass-ceramic, and with the incorporation of the P2O5 (1.0 mol%), which has been found the optimum to obtain transparent glass-ceramics, the transmittance is still about 85%. As the P2O5 content increased to 3.0 mol%, besides fluor-phlogopite mica, forsterite also precipitates, the size of the crystals increase, their distributions turned to be broad due to the change of the crystallization mechanism and the transparency of glass-ceramic consequently decreases. | Versión del editor: | https://doi.org/10.1016/j.ceramint.2022.11.156 | URI: | http://hdl.handle.net/10261/348609 | DOI: | 10.1016/j.ceramint.2022.11.156 | E-ISSN: | 1873-3956 |
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