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Thermal analysis and crystallization of the glasses inside the BaO-SrO-TiO2-NaPO3 system
Fac Sci Meknes, PCMC, Equipe Physicochim Mat Condensee, Meknes, Morocco..
Fac Sci Meknes, PCMC, Equipe Physicochim Mat Condensee, Meknes, Morocco..
Univ Hassan 1er, LS3M, Khouribga 25000, Morocco.;Mohammed VI Polytech Univ, CAM, Lot 660 Hay Moulay Rachid, Ben Guerir 43150, Morocco..
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics.
2017 (English)In: Journal of thermal analysis and calorimetry (Print), ISSN 1388-6150, E-ISSN 1588-2926, Vol. 128, no 2, p. 883-890Article in journal (Refereed) Published
Abstract [en]

The xBa(0.5)Sr(0.5)TiO(3)-(1 - x)NaPO3 (x = 0-0.20 mol%) glasses were prepared by the conventional melt-quenching method. The amorphous state of the samples was verified by X-ray diffraction. The density, molar volume, glass transition temperature (T (g)), micro-hardness and the crystallization temperature (T (c)) are determined for each glass. It is found that they depend strongly on the chemical composition of the glasses. The results of the micro-hardness show an increase in the H (v) parameter with the Ba0.5Sr0.5TiO3 content. The crystallization of glasses is made by submitting samples to heat treatments, and the crystallized phases are identified by XRD. The kinetic of the crystallization is carried out by thermal analysis using DSC technique. The mechanism of crystallization is proposed according to the determined activation energy (E (a)) and the Avrami parameter (n). The structural approach of the glasses was realized out by IR spectroscopy. This technique has highlighted the co-existence of different phosphate and titanium structural units in the glassy-matrix.

Place, publisher, year, edition, pages
SPRINGER , 2017. Vol. 128, no 2, p. 883-890
Keywords [en]
Phosphate, Glasses, Glass-ceramics, Crystallization, Kinetic, Thermal analysis
National Category
Geochemistry
Identifiers
URN: urn:nbn:se:uu:diva-322168DOI: 10.1007/s10973-016-5986-5ISI: 000399242400027OAI: oai:DiVA.org:uu-322168DiVA, id: diva2:1096172
Funder
Swedish Research CouncilAvailable from: 2017-05-17 Created: 2017-05-17 Last updated: 2017-05-17Bibliographically approved

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Lazor, Peter

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