Vibrational, Thermal, and Physical Characterizations of Some Zinc Niobo Tellurite Glasses Doped with Rare Earth (Eu, Dy)

Afrash Ejigu, A and Ramesh, KP and Honnavar, G (2021) Vibrational, Thermal, and Physical Characterizations of Some Zinc Niobo Tellurite Glasses Doped with Rare Earth (Eu, Dy). In: Optics and Spectroscopy .

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Abstract

Abstract: In this communication, we report physical and thermal properties along with Raman spectroscopic investigations on Zinc Niobo Tellurite glass systems doped with Eu2O3 and Dy2O3 at the expense of TeO2. The glasses have been synthesized by the melt quenching technique. Physical parameters like density, molar volume, packing density were estimated. The density of the un-doped glasses increases with increasing mol of the modifier (ZnO) whereas the glass transition temperature (Tg) decreases. We have observed an increase in the density of the base glass systems which are doped with rare earth (RE) dopants. The packing density of the un-doped glasses remains almost constant with increasing modifier content suggesting that there is not much change in the local environment. Raman spectra were recorded at room temperature and assigned to TeO4 and TeO3 structural units in these glasses. The peak shift, full width at half maximum (FWHM) of the de-convoluted Raman peaks were analyzed to get information about the local environment. It is observed that these compositions of tellurite glasses are good host materials for rare earth ions as they offer voids in the network. Further, it was observed that the rare earth ion doping has not affected the local environment of the glasses; Dy3+ ions have a slightly higher tendency to polarize Te�O bonds than the Eu3+ ions. © 2021, Pleiades Publishing, Ltd.

Item Type:	Journal Article
Publication:	Optics and Spectroscopy
Publisher:	Pleiades journals
Additional Information:	The copyright for this article belongs to Pleiades journals.
Keywords:	Dysprosium compounds; Europium compounds; Glass; Glass transition; II-VI semiconductors; Metal ions; Rare earths; Samarium compounds; Tellurium compounds; X ray diffraction; Zinc oxide, Doped glass; DSC; FTIR; Local environments; Niobium-based tellurite glass; Packing density; Physical characterization; Tellurite glass; Thermal characterization; XRD, Fourier transform infrared spectroscopy
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	05 Jan 2022 06:41
Last Modified:	05 Jan 2022 06:41
URI:	http://eprints.iisc.ac.in/id/eprint/70901

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