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Structure, thermal analysis and optical properties of lithium tungsten-titanophosphate glasses
Univ Moulay Ismail, Equipe Physicochim Mat Condensee, PCMC, Fac Sci Meknes, Meknes, Morocco..
Univ Moulay Ismail, Equipe Physicochim Mat Condensee, PCMC, Fac Sci Meknes, Meknes, Morocco..
Univ Hassan 1Er, Lab Sci Mat Mat & Modelisat LS3M, Settat 26000, Morocco.;Mohammed VI Polytech Univ, Mat Sci & Nanoengn Dept MSN, 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.ORCID iD: 0000-0001-9992-8009
2017 (English)In: Journal of Non-Crystalline Solids, ISSN 0022-3093, E-ISSN 1873-4812, Vol. 463, 12-18 p.Article in journal (Refereed) Published
Abstract [en]

A melt-quenching method is used to prepare homogeneous glasses inside the 20Li(2)O-(50-x)Li2WO4-xTiO(2)-30P(2)O(5) (x = 0, 5, 8,10 and 15 mol%) system. The amorphous and glassy states of the glasses are evidenced by the X-ray diffraction and differential scanning calorimetry (DSC) analysis, respectively. The glasses were found to be colorless. The determined parameters for the glasses such as density, molar volume and glass transition temperature (T-g) depend strongly on the chemical composition of the glasses. The density and T-g are found to decrease and increase with TiO2 content, respectively. Infrared (IR) spectroscopy is used to characterize their structural approach. This technique has allowed the identification of different phosphate structural units mainly pyrophosphate and metaphosphate in their structure. From the absorption edge studies, the values of the optical band gap, E-g, and Lirbach energy, Delta E, were evaluated. The optical band gap is found to depend on the glass composition and it decreases as the content of the TiO2 increases. (C) 2017 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 463, 12-18 p.
Keyword [en]
Phosphate, Glasses, DSC, IR spectroscopy, Optical properties
National Category
Geochemistry
Identifiers
URN: urn:nbn:se:uu:diva-330050DOI: 10.1016/j.jnoncrysol.2017.02.013ISI: 000405154700003OAI: oai:DiVA.org:uu-330050DiVA: diva2:1155870
Available from: 2017-11-09 Created: 2017-11-09 Last updated: 2017-11-09Bibliographically approved

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