UV-Vis and FTIR spectroscopic studies of CaO-Na₂B₄O₇-PbF₂- CuO glasses

Department of Physics, University College of Science, Osmania University, Hyderabad, Telangana, 500007

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Published online: 5 March 2026

Abstract

The present work deals with the preparation of CaO-Na₂B₄O₇-PbF₂-CuO glasses and investigating the prepared samples with various spectroscopic methods. Melt quenching method is used for the preparation of the glass samples with the composition (89-x)Na₂B₄O₇-xCaO-10PbF₂-1CuO where x = 0, 5, 10. 15 & 20 mol%. Amorphous nature of the samples was confirmed with the absence of sharp peaks in the XRD spectra. Density measurements were done and are observed to be increasing with CaO in the glass composition. Various optical parameters were evaluated from absorption spectra and characteristic absorption is noticed in it as the glass samples contain Cu²⁺ ions. Band gap values were found to decrease while the refractive index values increased. FTIR spectra was also recorded and analyzed for each sample as it is more important in exploring the structural features of borate glasses. The spectra revealed the existence of the metal ions and various borate groups in the glass structure.