Gurusamy Rajkumar

In this investigation, we aimed to analyze the structural and physical variations of V2O5-doped CaO-B2O3 glass under low-temperature plasma (LTP) conditions. The ionic and electronic species formed in LTP treatment favor structural rearrangement in the quenched glasses without causing bulk crystallization. X-ray diffraction and Fourier transform infrared spectroscopy structural characterization studies showed that plasma treatment improves network connectivity via the creation of V–O–B and B–O–B linkages, an increased proportion of VO4 and BO4 structural units, and a reduced number of defects. Scanning electron microscopy indicated smoother surface morphology and less microphase separation after exposure to plasma, which demonstrates better structural homogeneity. The physical properties, such as density, systematically increase with V2O5 content integration, while the glass transition temperature (Tg) and optical bandgap decrease, which can be attributed to depolymerization of the network and creation of localized states associated with V2O5, despite the effect of strong V–O bonds. The synergistic effect of V₂O₅ doping and plasma treatment produces glasses with improved chemical durability, thermal stability, and mechanical properties, highlighting the effectiveness of LTP as a post-synthesis method to tailor the structural and functional characteristics of borovanadate glasses. Of all prepared samples, the 30 mol% V2O5 composition showed better performance than other compositions.

In this investigation, we aimed to analyze the structural and physical variations of V2O5-doped CaO-B2O3 glass under low-temperature plasma (LTP) conditions. The ionic and electronic species formed in LTP treatment favor structural rearrangement in the quenched glasses without causing bulk crystallization. X-ray diffraction and Fourier transform infrared spectroscopy structural characterization studies showed that plasma treatment improves network connectivity via the creation of V–O–B and B–O–B linkages, an increased proportion of VO4 and BO4 structural units, and a reduced number of defects. Scanning electron microscopy indicated smoother surface morphology and less microphase separation after exposure to plasma, which demonstrates better structural homogeneity. The physical properties, such as density, systematically increase with V2O5 content integration, while the glass transition temperature (Tg) and optical bandgap decrease, which can be attributed to depolymerization of the network and creation of localized states associated with V2O5, despite the effect of strong V–O bonds. The synergistic effect of V₂O₅ doping and plasma treatment produces glasses with improved chemical durability, thermal stability, and mechanical properties, highlighting the effectiveness of LTP as a post-synthesis method to tailor the structural and functional characteristics of borovanadate glasses. Of all prepared samples, the 30 mol% V2O5 composition showed better performance than other compositions.