Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/83661
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Effect of fluorine content on glass stability and the crystallisation mechanism for glasses in the SiO2-CaO-K2O-F system |
Autor: | Casasola, Raquel CSIC ORCID; Pérez, Juan M. CSIC ORCID; Romero, Maximina CSIC ORCID | Palabras clave: | DSC Crystallisation mechanism Cuspidine Hrubÿ Weinberg Lu-Liu Glass-forming ability Glass |
Fecha de publicación: | 2013 | Editor: | Elsevier | Citación: | Journal of Non-Crystalline Solids 378 (2013) 25–33 | Resumen: | This paper provides the results of a study that examines the effect of fluorine content on glass stability (GS) and the crystallisation mechanism for a series of glasses in the SiO2-CaO-K2O-F system. Four glass compositions, with fluorine contents ranging from 2.51 to 5.63 wt. %, were analysed by differential scanning calorimetry (DSC). The evaluation of GS was based on various parameters derived from characteristic temperatures of non-isothermal DSC curves, namely, the working range (TTS), reduced glass transition temperature (Tgr), Weinberg (Kw), Hrubÿ (KH) and Lu-Liu (KLL) parameters. The predominant crystallisation mechanism for each glass was assessed via the Thakur and Thiagarajan method by determining the variation in crystallisation temperature between powder and bulk glass samples (Tp). The evaluation of glass forming ability (GFA) was based on the critical cooling rate (qc), which is determined from the Weinberg, Hrubÿ and Lu-Liu parameters. The results indicate that an increase in fluorine content leads to a change in the crystallisation process of these glasses, from a mechanism of surface crystallisation that is predominant in glasses with lower fluoride content (MIS-E, MIS-6 and MIS-8 with 2.51, 3.39 and 4.27 wt. % of fluorine, respectively) to a prevailing volume crystallisation in MIS-10 glass (5.63 wt.% of fluorine). An increase in fluorine content also leads to a decrease in GFA of the corresponding melts, which results in the segregation of CaF2 crystals during cooling. The results demonstrated by DSC analyses are supported by the results obtained from X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). | Versión del editor: | 10.1016/j.jnoncrysol.2013.06.006 | URI: | http://hdl.handle.net/10261/83661 | DOI: | 10.1016/j.jnoncrysol.2013.06.006 | ISSN: | 0022-3093 |
Aparece en las colecciones: | (IETCC) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Journal of Non Crystalline Solids 378 (2013) 25–33.pdf | 1,12 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
15
checked on 12-abr-2024
WEB OF SCIENCETM
Citations
14
checked on 23-feb-2024
Page view(s)
367
checked on 17-abr-2024
Download(s)
347
checked on 17-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.