Thermal and optical properties of binary magnesium tellurite glasses and their link to the glass structure

Elkholy H, Othman H, Hager I, Ibrahim M, de Ligny D (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Journal of Alloys and Compounds Elsevier

Book Volume: 823

Article Number: 153781

DOI: 10.1016/j.jallcom.2020.153781

Abstract

Binary magnesium tellurite glasses x MgO, (100-x) TeO2, studied to determine their glass forming range, structure, thermal and optical properties. Glasses were successfully synthesis in the range x = 10–45 mol%. Addition of 50 mol% of MgO leads to the appearance of the Mg3TeO6 crystalline phase. The molar volume decreases linearly with increasing MgO content. Both glass transition and crystallization temperature increase with increasing MgO content. The deduced glass stabilities show a slight maximum for x = 25 and 30mol%. Studying the structure of these glasses using Raman spectroscopy reveals the transformation of trigonal bipyramid TeO4 (tbp) structural unit to the trigonal pyramid TeO3 units with the intermediate phase TeO3+1. The coordination of Te–O decreases with increasing MgO content. The UV–Vis spectra show a shift of the UV-cutoff toward higher energy and the measured refractive index decreases with increasing MgO. Optical band gap was estimated and the obtained values were used to calculate molar refractivity, molar polarizability and a calculated refractive index. The metallization criterion is found in the range (0.399–0.417) indicating good optical nonlinearity of the prepared glasses.

Authors with CRIS profile

Dominique de Ligny Professur für Werkstoffwissenschaften (Glas und Keramik)

Involved external institutions

Menoufia University (Minoufiya / Minufiya University) / جامعة المنوفية‎ EG Egypt (EG) National Research Centre (NRC) / المركز القومي للبحوث EG Egypt (EG)

How to cite

APA:

Elkholy, H., Othman, H., Hager, I., Ibrahim, M., & de Ligny, D. (2020). Thermal and optical properties of binary magnesium tellurite glasses and their link to the glass structure. Journal of Alloys and Compounds, 823. https://dx.doi.org/10.1016/j.jallcom.2020.153781

MLA:

Elkholy, Hagar, et al. "Thermal and optical properties of binary magnesium tellurite glasses and their link to the glass structure." Journal of Alloys and Compounds 823 (2020).

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