Role of molybdenum ions in lead zinc phosphate glass system by means of dielectric studies

Abstract

PbO-ZnF 2 -P 2 O 5 glasses doped with different mol% (0.1 to 1.0) of MoO 3 have been prepared. Dielectric properties ′ (ω), tanδ, σ AC , of the synthesized samples were calculated from frequency measurements versus temperature. Space charge polarization was used to analyze the temperature and frequency dispersions of dielectric constant ′ (ω) and dielectric loss tanδ. Quantum mechanical tunneling model was employed to explain the origin of AC conductivity. The AC conductivity exhibited an increasing trend with increasing concentration of MoO 3 (up to 0.2 mol%) but the activation energy for conduction decreased. The plots of AC conductivity revealed that the relaxation dynamics depends on MoO 3 dopant concentration.