| Lithium zinc phosphate glasses with the composition 45P2O5
-25ZnO-(30–x)Li2O-xCo3O4
(x = 0-6 mol%) were synthesized via the conventional melt-quenching method. X-ray
diffraction confirmed the non-crystalline nature of all prepared glass matrices. Thermal
analysis revealed improved thermal stability with cobalt incorporation, suggesting
that addition of CoO strengthens the glass matrix. The electrical behaviour was
examined over a wide frequency range and different temperature ranges, showing
thermally activated conduction. The calculated activation energy lies in the range of
0.12 to 1.24 eV, depending on composition. The observed AC conductivity obeys
Jonscher’s universal power law, and frequency exponent values below unity suggest
a conduction mechanism consistent with correlated barrier hopping. Dielectric
analysis ( ), electric modulus (M, M) and impedance spectra (Z, Z) provided
further insights into relaxation dynamics and ion transport behaviour. |
