Properties of silver phosphate glass in the presence of nanosize cobalt and nickel oxides

•Glasses, doped with 0, 5, 10, 15 & 20 wt.% NiO/CoO were prepared by quench melt technique.•Electrical conductivities of all the glasses were measured at different temperatures and frequencies.•In the presence of dopants Tg values are increased.•Glasses with higher CoO/NiO contents exhibit a higher structural cohesion.

Silver phosphate glasses, undoped and doped with 0, 5, 10, 15 & 20 wt.% CoO/NiO were prepared by quench melt technique. The prepared glasses were characterized by using X-ray diffraction and FTIR spectroscopic techniques. Glass transition temperatures were determined by Differential Scanning Calorimetric technique whereas morphological changes in the freshly prepared and aged glasses were examined by SEM technique. Electrical conductivities and dielectric constants of all the glasses were measured at different temperatures and frequencies. Structural changes and changes in electrical conductivities and dielectric constants with temperature and frequencies have been discussed and a plausible mechanism is given.