1. Physical, thermal and optical study of Bismuth modified boro-vanadate glasses: V2O5-B2O3-Bi2O3.
- Author
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Rani, Asha, Parmar, Rajesh, and Kundu, R. S.
- Subjects
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OPTICAL glass , *ULTRAVIOLET spectrometry , *GLASS transition temperature , *MOLECULAR volume , *BAND gaps - Abstract
The present study investigated the influence of varying Bi2O3 concentration on physical, thermal and optical properties of boro-vanadate glasses. Glasses with the composition of 60V2O5−(40-x) B2O3-xBi2O3 were synthesized; where x=5-25 mol% (with step size of 5 mol%). The non-crystalline nature of prepared samples was confirmed with X-ray diffraction (XRD) patterns. The different properties of the processed samples were ascertained using a density measurement instrument, Differential scanning calorimeter (DSC) and ultra-violet visible spectrometry (UV-visible). The glass samples' density, molar volume, and crystalline volume increases while the band gap decreases as Bi2O3 content increases. The band gap was found in the range of 1.63 eV to1.92 eV. Glass transition temperature (Tg) showed a decreasing trend but increased for a sample x=20 mol%. Various other calculated parameters include refractive index (n), molar refractivity (Rm), metallization criterion (M), electronegativity (χ), optical basicity and electron polarizability (αᵒ). The high refractive index values (2.77-2.92) and low metallization criterion (ranging from 0.286-0.310) observed across all samples indicate the potential suitability of these glasses for non-linear optical purposes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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