Compositional effect of barium ions (Ba2+) on ultrasonic, structural and thermal properties of leadborate glasses

Abstract

Glasses of the formula 68B2O3-(32-x)PbO-xBaO (0≤ x ≤ 12) were synthesized by standard melt quench technique and investigated their properties using XRD, ultrasonic, FT-IR and DTA studies. No sharp peaks are existing in the XRD spectra and the broad halo appeared around 2θ≈30o, which reflects the characteristics of amorphous nature. Density decreases due to the replacement of higher molar mass by lower molar mass. The ultrasonic velocity varies with the gradual substitutions of barium ions in leadborate host glass matrix. The variations in elastic moduli such as L, G, K and E), Poisson’ sratio(σ), acoustic impedance(Z), microhardness (H) and Debye temperature (θD)were observed which resulted in compact glasses. The functional groups of prepared glasses were studied by FTIR analysis and BO4 structural units enhanced with decreasing BO3 structural units. Characteristic temperatures of DTA increase because of the higher bond strength of barium ions and also strength of the glasses.