Impact of ZnO on the Physical and Optical Properties of PbO-B2O3 Glasses

J. Singha, G.P. Singha, P. Kaura, T. Singha, S. Bhatiaa, R. Kaurb, D.P. Singhc aP.G. Department of Physics, Khalsa College, Amritsar 143002, India bP.G. Department of Physics, Lyallpur Khalsa College, Jalandhar 144001, India cDepartment of Physics, Guru Nanak Dev University, Amritsar 143005, India

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The structure of the xZnO-30PbO-(70-x)B2O3 (x=5-20 mol%) glass system is investigated by analysing the physical parameters like molar volume and density. An increase in density (5.31-5.7 g/cm3) and consistent decrease in molar volume (20.95-20.03 cm3/mol) of glass samples is observed with the rise in ZnO content. The X-ray diffraction pattern confirms the amorphous nature of glass samples. The ultraviolet-visible spectroscopy technique is utilized to detect changes in optical parameters, like optical band gap and refractive index. The results depicted a reduction in optical band gap (2.63-2.41 eV) with an increase in ZnO content. Other parameters, such as oxygen packing density, ionic behaviour and average boron-boron separation of prepared glasses, have also shown a variation with a change in ZnO content. Infrared Spectroscopy measurements confirm the change of borate coordination from trigonal BO3 to tetrahedral BO4.

DOI:10.12693/APhysPolA.142.195 topics: glasses, band gap, density, molar volume