Spectroscopic Properties, Electronic Polarizability, and Optical Basicity of Titanium–Cadmium Tellurite Glasses Doped with Different Amounts of Lanthanum

The authors reported the data found by FT-IR spectroscopy, and ultrasonic velocities investigations of 65TeO₂ – 25TiO₂ – (10-x) CdO – x La₂O₃, (0 ≤ x ≤ 10 mol%) of the prepared glass samples. FT-IR spectra of these glass samples have been indicated the cadmium lanthanum tellurite titanate glasses increase the transformation of (TeO₄) structural units into (TeO₃) structural units with creation of non-bridging oxygen. The mechanical properties have been associated with the results of FT-IR spectra. It was noted that the elastic-moduli, and density of these samples slightly decrease with the increase of lanthanum due to the creation of non-bridging oxygen. UV–visible spectroscopy was recorded at room temperature for these glasses. The increase of Lanthanum shifts the optical spectra to the redshift of the optical bandgap. So, lanthanum is accountable for the increase of non-bridging oxygen due to this shift is obtained. So, the optical bandgap of these glasses has been decreased as well as the refractive index. Polarizability and basicity of the prepared glasses according to the refractive index and optical bandgap have been investigated.