Effect of ZrF₄ on the Physical and Absorption Properties of Magnesium Tellurite Glass

Abstract:

Tellurite glass containing zirconium fluoride (ZrF₄) with composition of (90-x)TeO₂-10MgO-(x)ZrF₄,where 0.0 ≤ x ≤ 6.0 in mol% has successfully been prepared by melt quenching technique. X-Ray Diffraction (XRD) pattern verified the amorphous nature of the glass. In this study, the physical and optical properties were investigated in term of density and absorption properties by using Archimedes method and UV-Vis Spectroscopy. It was found that glass density decreases in the range of 4.842 – 4.995 g cm^-3 with the increase of ZrF₄ concentration. Meanwhile, the molar volume is increased in the range from 29.566 to 30.593 cm³/mol with increase of ZrF₄. The absorption edge is found to shift toward a higher wavelength as the ZrF₄ concentration is increased. On the other hand, the optical energy band gap shows the decrement from 2.573 to 2.212 eV for indirect transition and from 3.044 to 2.927 eV for direct transition with the addition of ZrF₄ concentration while the Urbach energy, increases from 0.302 to 0.498 eV with the increase of ZrF₄. All the results will be discussed with respect to the glass composition.

• Periodical: Solid State Phenomena (Volume 268)
• Pages: 77-81
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.268.77
• Online since: October 2017
• Authors: Siti Khadijah Mohd Zain, M.R. Sahar*, E.S. Sazali
• Keywords: Molar Volume, Oxyfluoride Tellurite Glass, Physical Properties, UV-VIS-NIR, X-Ray Diffraction (XRD)

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