Borate glasses Na2B4O7 – CdO – CuO- BaTiO3 have been manufactured by the traditional melt quenching method. The increment of BaTiO3 affects strictly the density and the molar volume of the glass samples. The spectroscopic investigations by FTIR and Raman spectra show that the glass network consists of different structural units of [BO3] and [BO4] along with [TiO4]. The elaborated investigations assume the glass former role of TiO2. These arguments depend on the transformation of [BO3] into [BO4] units, which result in a decrement in the magnitude of disorder in the glass structure. The compositional dependence on BaTiO3 reveals that the behavior of Urbach energy confirms the decrement of disorder and the trend of the optical band gap shows a decrement process with a priority to direct transitions. Moreover, EPR spectra revealed that the Cu2+ ions occupy the positions of elongated octahedral positions with tetragonal distortions.

This manuscript deals with the preparation and detailed physical and structural study of B2O3-CdO-Al2O3-PbF2 glasses reinforced with MoO3 ions. With the addition of MoO3, the density and band gap values decreased while the refractive index increased, confirming the transformation of Mo6+ ions to Mo5+ ions and resulting in the generation of NBO's in these glasses. The FTIR spectra revealed the presence of different borate and aluminate units. The FTIR spectra also indicated the conversion of Mo6+ ions to Mo5+ ions. The effect of MoO3 ions on Raman spectra was clearly visible and indicated the conversion of BO4 to BO3 units, increasing NBO’s which helped to explain the density variation.