Abstract
The glass system xBaTiO3 (BT) - 10−xPbTiO3 (PT) -60V2O5-30B2O3 with x = 2.5, 5, and 7.5 mol% was successfully fabricated by using melt quenching method. The glassy behavior was investigated by DSC and XRD, and the intermediate range order in these glasses was confirmed by Raman studies. The HRTEM study performed in this glass system confirmed the existence of polar clusters (PCs) embedded in the glass matrix. The dielectric measurements showed diffuse and frequency dependent phase transition behaviors for all the samples. The appearance of the relaxor/ferroelectric behavior in this glass system can be attributed to the existence of PCs embedded in the glass matrix. Also, the x = 2.5 sample showed energy storage density of about 0.44 J/cm3 at ambient temperature, and at elevated temperatures the energy storage density reached 1.391 J/cm3 for the composition x = 5. These features suggest that the present glasses can be considered as a promising candidate for large variety of moderate power and energy storage applications.
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