Impact of silver ions on dielectric properties and conductivity of lithium silicate glass system mixed with red lead

•Pb3O4 mixed lithium silicate glasses doped with variable content of Ag2O were prepared•Structural studies revealed increased polymerization of the glass network with Ag2O•Dielectric parameters and ac conductivity were measured as a function of Ag2O content•Plots of electric modulus vs w and T indicated a relaxator like character•Conduction was explained with polaron tunneling model in the middlew and high T ranges