Influence of temperature and frequency on ionic conductivity of Li3PO4–Pb3(PO4)2–BiPO4 phosphate glasses

• Results of ionic conductivities of Li3PO4–Pb3(PO4)2–BiPO4 phosphate glasses.
• Determination of glass transition temperature using DSC method.
• Study of temperature and frequency on ionic conductivity of Li3PO4–Pb3(PO4)2–BiPO4 phosphate glasses.

Lithium–Lead–Bismuth phosphates glasses having, a composition 30Li3PO4–(70 − x)Pb3(PO4)2–xBiPO4 (45 ≤ x ≤ 60 mol%) were prepared by using the melt quenching method 1000 °C. The thermal stability of theses glasses increases with the substitution of Bi2O3 with PbO. The ionic conductivity of all compositions have been measured over a wide temperature (200–500 °C) and frequency range (1–106 Hz). The ionic conductivity data below and above Tg follows Arrhenius and Vogel–Tamman–Fulcher (VTF) relationship, respectively. The activation energies are estimated and discussed. The dependence in frequency of AC conductivity is found to obey Jonscher’s relation.

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