Abstract
Glasses having composition 4BaO•24Fe2O3•10Bi2O3•62B2O3 and 5BaO•30Fe2O3•10Bi2O3•55B2O3 have been prepared by melt quench technique and formation of glass was confirmed by XRD. As prepared glass samples were thermally treated at 600°C for 6 hrs and magnetic phase hematite was observed having crystallite size ∼60 nm evaluated by XRD Debye Scherer equation. Existence of hematite was also confirmed by IR spectra of thermally treated glass samples by peaks positioning at ∼470 cm−1 and ∼560 cm−1. Infrared absorption spectra revealed the existence of BO3 and BO4 units in the glass network. Electrical properties of glasses i.e. ac conductivity and dielectric properties have been studied using Impedance Spectroscopy. Synthesized glass samples were found to be following Jonscher power law. The relaxation in conductivity of the charge carriers was investigated using the electrical modulus formulism, and the results show the presence of the non-Debye type of relaxation in the prepared glasses. The complex impedance curves (Z′ (ω) vs. Z″ (ω)) were plotted and single well shaped semicircles depicts a single conduction mechanism.
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