Investigation of the Influence of Tungsten on the Physical Properties of Heavy Metal Oxide Doped Tellurite Glasses
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Abstract
The Heavy metal oxide (HMO) tellurite glasses (TGs) have gained attention for photonic and optoelectronic uses because of their excellent structural and optical qualities. In this study, we investigated how adding tungsten oxide (WO₃) affects the physical, structural, and thermal properties of TGs. We prepared samples with the composition of (80−x)TeO₂–10Na₂O–10ZnO–xWO₃ (x = 5, 10, 15, 20 mol%) using the melt-quenching method, and X-ray diffraction showed only broad halos, which revealed the glasses were amorphous. The DSC analysis revealed glass transition and crystallization temperatures, which point to good thermal stability. The Raman spectra displayed typical TeO₄, TeO₃, and WO₆ structural units, revealing how WO₃ modifies the glass network, and with rising WO₃ content, density and molar mass increased while molar volume dropped, suggesting a more compact structure. The W ion concentration increased, polaron radius and interionic distance decreased, and field strength increased, indicating tighter packing and stronger network rigidity. In conclusion, adding WO₃ leads to improved compactness, stability, and physical properties, which make these glasses promising for optical devices, photonics, and radiation shielding.
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