• Vanaja karupally

Glasses made from Li2O−SrO−CdO−B2O3 with varying concentrations of V2O5 (from 0 to 1.0 mol %) were synthesized. The samples were analyzed using X-ray diffraction, scanning electron microscopy, and differential scanning calorimetry. Studies on optical absorption, ESR, photoluminescence, and IR were conducted on these glass materials. The optical absorption spectrum of the vanadium-doped glasses showed two broad absorption bands at 534 and 820 nm. These bands are associated with the transitions 2B2→2B1 (Δ⊥) and 2B2→2E (Δ||) of the 3d1 electron in the V4+ state. A significant shift of the peak positions of these bands toward longer wavelengths was observed, along with an increase in intensity as the concentration of V2O5 rose to 0.6 mol %. The highest intensity of these bands in the spectrum of V6 glass suggests a maximum concentration of VO2+ ions, which act as modifiers in the glasses. Analysis of the Li2O−SrO−CdO−B2O3: V2O5 glasses indicates that when V2O5 concentration is ≤ 0.6 mol%, vanadium ions are primarily in the VO2+ state, occupying modifier positions and weakening the glass network. Conversely, when the V2O5 concentration exceeds 0.6 mol%, some vanadium ions transition to the V5+ state, taking network-forming positions and reinforcing the glass structure.

Glasses, vanadyl ions, Borate glasses, Network-formers

"Spectroscopic Properties VO2+ in Li2O-SrO-CdO-B2O3 glasses", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 11, page no.g414-g419, November-2022, Available :http://www.jetir.org/papers/JETIR2211685.pdf

"Spectroscopic Properties VO2+ in Li2O-SrO-CdO-B2O3 glasses", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 11, page no. ppg414-g419, November-2022, Available at : http://www.jetir.org/papers/JETIR2211685.pdf