Abstract
The authors reported the data found by FT-IR spectroscopy, ultrasonic velocities, DTA and, optical investigations of (50-x) Na
2
B
4
O
7
–30PbO
2
–20SiO
2
–xTiO
2
where x = (0, 10, 20, 30, 40, and 45) mol%. The structure changes of these glasses will be studying by FT-IR spectra. The mechanical properties have been associated with the results of FT-IR spectra. It was noted that the ultrasonic velocities, elastic-moduli, and density physical properties of these samples increased. The obtained results will discuss in terms of structural changes due to the addition of TiO
2
. Optical feature spectra are recorded at room temperature. The Urbach’s energy (
E
u
) of the prepared samples has been estimated. Polarizability and basicity of the prepared glasses according to the refractive index and optical bandgap have been investigated. The nature of the produced glasses and glass–ceramics was examined by (XRD) analysis.