The melt-quench technique was employed to synthesized (50-x)Li₂O-xV₂O₅-50B₂O₃glass series with varying vanadium concentrations (x=0, 4, 8, 12, 16 and 20 mol%). X-ray diffraction analysis revealed the absence of sharp diffraction peaks, confirming the amorphous nature of the glass samples. FTIR and Raman spectroscopic analysis revealed that an increase in V₂O₅content promotes the conversion of BO₄ units into BO₃ units, resulting in a higher concentration of non-bridging oxygen (NBO) atoms. The absence of VO₅ polyhedra in the FTIR and Raman spectra suggests that vanadium primarily forms VO₄ units within the glass matrix. These findings underscore the role of V₂O₅as a network modifier in lithium borate glasses. Thermal properties were investigated using differential scanning calorimetry (DSC), which revealed a decrease in the glass transition temperature (T_g) with increasing vanadium content. This decline in T_g is attributed to the formation of non-bridging oxygen (NBO) atoms, which disrupt the connectivity of the glass network. Notably, the LVB3 glass sample exhibited the highest thermal stability (ΔT) and glass-forming ability (K_gl), indicating that it is the most thermodynamically stable composition in the glass series.

Lithium Borate Glasses, Vanadium Pentaoxide, X-ray Diffraction, Thermal Properties, Raman Spectroscopy