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

P. Venkateswara Rao; G. Naga Raju; P. Syam Prasad; T. Satyanarayana; L. Srinivasa Rao; F. Goumeidane; M. Iezid; W. Marltan; G. Sahaya Baskaran; N. Veeraiah

doi:10.2478/msp-2018-0074

Abstract

PbO-ZnF₂-P₂O₅ glasses doped with different mol% (0.1 to 1.0) of MoO₃ 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 MoO₃ (up to 0.2 mol%) but the activation energy for conduction decreased. The plots of AC conductivity revealed that the relaxation dynamics depends on MoO₃ dopant concentration.

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

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