Development, Characterization and Applications of Borophosphate Containing TiO2 Glasses

Phosphate glasses are attractive because of their low processing temperature and compositional versatility; however, their high hygroscopicity limits aqueous applications. In this context, B₂O₃ and Al₂O₃ were added to NaPO₃-TiO₂ composition to increase network connectivity and chemical durability [1], while TiO₂ plays both structural and functional role [2]. Borophosphate glasses in the NaPO₃-B₂O₃-TiO₂-Al₂O₃ (NBTA) system varying TiO₂ content from 5 to 30 mol% were obtained by melt-quenching and evaluated through UV–Vis absorption, EPR, DSC, XRD and Raman spectroscopy aiming to establish structure-property relationships in TiO₂-containing borophosphate glasses. Future works consist of assessing NBTA potential for some applications, such as optical and photocatalytic activity.