Ultrasonic Investigation on Ferroelectric BaTiO3 Doped 80V2O5?20PbO Oxide Glasses

Abstract

The frequency dependent ultrasonic velocities (both longitudinal and shear) and attenuation in BaTiO 3 doped (80V 2 O 5 ±20PbO + x BaTiO 3 ) oxide (VPB) glasses (for x 0, 1, 5, 10, and 15 wt% of the base glass) have been measured using pulse echo overlap method at room temperature. From the measured velocity, density and attenuation, various parameters namely longitudinal, shear, bulk, and Young's moduli, Debye temperature, Poisson's ratio, acoustic impedance and microhardness of the VPB glasses were determined. All these parameters of the glasses increase with addition of BaTiO 3 content. On the other hand, attenuation decreases with addition of BaTiO 3 . The variation of these parameters with the addition of BaTiO 3 content was discussed in terms of the change in structure of the glass network. The study reveals that ultrasonic velocity and attenuation measurements have been effectively used as a tool to explore the structural changes and mechanical properties on addition of BaTiO 3 in vanadate lead glasses.

Structural Analysis of Borotellurite Glass

“…Rajendran et al [3,14] and Bridge et al [15][16][17] proposed that a high cross-link density has Poisson's ratio in the order of 0. [8] .…”

Temperature and Composition Dependence of the Elastic Properties of Semiconducting (100 -x)V2O5-xPbO Oxide Glasses

“…Lead vanadate (100 --x)V 2 O 5 -xPbO glasses for different PbO contents namely x ¼ 22, 25,27,30,32,33,34,35, and 36 wt% (hereafter termed as VP22, VP25, VP27, VP30, VP32, VP33, VP34, VP35, and VP36, respectively) have been prepared by a rapid quenching technique [16]. The reagent grade raw materials (99.9% and 99.99% purity of V 2 O 5 and PbO, respectively) were weighed out in the ratio of the specified compositions (in batches of approximately 10 g for each composition).…”

Structure and Characterization of Some High Chemically Resistance Silicate Glasses

“…The glass density depends mainly on network compactness, the change in geometrical arrangement, cross-link density and molar mass of elements [30]. The effect of different alkali and alkaline element replacements on the glass densities are presented in Figure 3.…”