Abstract
The glass samples were prepared with the eutectic composition of 40Li2O–4MoO3–(56−x)B2O3: xV2O5 by traditional melt-quenching method. Dielectric constant (ε′) and loss (tanδ) were measured as a function of wide range of temperatures (30 –280 °C), over the frequencies 102–105 Hz. Establishment of space-charge polarization in the glass system is illustrated with the help of measured dielectric parameters at room temperature. AC conductivity (σac) of the glasses has been deliberated by using the charge transfer mechanisms viz, quantum mechanical tunneling (at low temperatures) and correlated barrier hopping (at high temperatures). The obtained values of the temperature coefficient of the polarizability (ϕ) confirm the transformation of boron structural units BO3 → BO4 when x > 0.8 mol%. The glasses have exhibited the highest values of AC conductivity (σac), electronic polarizability (αe) and nonlinear optical susceptibility (χ(3)) at = 0.8 mol %.
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