Abstract
Glasses in the system (PbO)30(P2O5)40(ZnO)30−x(Li2O)x (where x=0, 15, 20, 25, 30mol%) and (PbO)30(P2O5)50(ZnO)20−x(Li2O)x (where x=0, 5, 10, 15, 20mol%) were prepared by conventional melt quenching technique. XRD and DSC measurements were performed to confirm their amorphous nature. Thermal stability factor (S) has been evaluated using the values of Tg and Tc. The refractive indices of these glasses lie in the range of 1.40–1.45. IR spectra of these glasses show absorption peaks in the range 1233–1247cm−1, 1076–1087cm−1, 905–894cm−1, 735–731cm−1 and 531–556cm−1 corresponding to PO, PO−, (POP)AS, (POP)S and OPO vibrations respectively. The peak corresponding to PO, shows red shift with increasing Li2O content indicating depolymerization of phosphate network.
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