DTA study of the crystallization of Li2O–Nb2O5–SiO2–TiO2 glass

Autor:	Vladimir D. Živanović, Jovica Stojanović, Snežana R. Grujić, Sonja V. Smiljanić, M.B. Tošić, Srđan Matijašević, Jelena Nikolić
Rok vydání:	2015
Předmět:	Materials science Morphology (linguistics) Nucleation Crystal growth LiNbO3 DTA Condensed Matter Physics Isothermal process law.invention Crystallography Volume (thermodynamics) Chemical engineering law Scientific method Phase (matter) Glass Physical and Theoretical Chemistry Crystallization
Zdroj:	Journal of Thermal Analysis and Calorimetry
ISSN:	1588-2926 1388-6150
DOI:	10.1007/s10973-015-4390-x
Popis:	In this study, the crystallization of 30Li(2)O center dot 15Nb(2)O(5)center dot 50SiO(2)center dot 5TiO(2) (mol%) glass was examined. The parent glass was prepared by the standard melt quenching method, and the investigations were performed under non-isothermal and isothermal conditions using the DTA, XRD, SEM and EDS methods. The results revealed primary crystallization of this glass and the dendritic morphology of crystal growth. Three crystalline phases were formed in the glass matrix during crystallization, whereby LiNbO3 was formed as the primary phase, followed by Li2Si2O5 and SiO2 as the secondary. The surface and volume mechanisms of crystallization occur. The condition that both the mechanisms were dominant was determined. In the case of volume crystallization, the characteristics of the nucleation process were examined. The kinetic parameters of crystallization under different mechanisms of crystallization were determined.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1d2ad86d4612319d37b420a1baea97c https://doi.org/10.1007/s10973-015-4390-x Zobrazit plný text záznamu Plný text ve formátu PDF