Eur. Phys. J. Plus (2022) 137: 475
https://doi.org/10.1140/epjp/s13360-022-02674-y

Regular Article

Impact of variation of TeO₂ on the thermal properties of lead borate glasses doped with Pr₂O₃

¹ Department of Physics, KLE Technological University, Hubballi, Karnataka, India
² Center for Materials Science, KLE Technological University, Hubballi, Karnataka, India

^a sangeeta_k@kletech.ac.in

Received: 15 December 2021
Accepted: 1 April 2022
Published online: 17 April 2022

Abstract

A study of variation of tellurium dioxide (TeO₂) on the thermal properties, of lead borate glasses are reported here with different compositions of lead oxide (PbO), boron trioxide (B₂O₃) and doped praseodymium trioxide Pr₂O_3, namely_, (75PbO + (24 − x) B₂O₃ + 1Pr₂O₃ + xTeO₂), Here, x is the composition of tellurium dioxide. The change in thermodynamic parameters such as Gibb’s free energy ∆G, entropy ∆S_m etc., has been reported. Specific heat capacity ∆C_p falls in the range of 1.5 and 1.56 times ∆S_m. Further, structural analysis of average density (cross-link) n_c, number of bonds per unit volume n_b, and the average force (stretching) F is also studied. Results confirm an increment in the F with T_g and mole% of TeO₂. Closely packed nature of the investigated glass is due to the increase in the bridging oxygens with increasing number of bonds (density) n_b and average density (cross-link) n_c of the investigated glasses. Investigated glasses are suitable for the possible applications in the opto-electronics world.