Structure and some properties of xBaO•(50-x)PbO•50P2O5 glasses
Abstract
FTIR, density, molar volume and DC conductivity of xBaO•(50-x)PbO•50P2O5 (0 ≤ x ≤ 50 mol%) have been investigated to elucidate the role of Ba2+ and Pb2+ ions and their effect on the structure and physical properties of phosphate glasses. Analysis of the FTIR spectra revealed that by replacing BaO for PbO, there is a decrease in the relative area of bands at 880 and 1075 cm-1 and an increase in the relative area of bands at 975 and ≥ 1250 cm-1. This is accompanied by a decrease in the electric conductivity and density. The results suggest that Ba2+ ions are preferentially linked to nonbridging oxygen ions in branching phosphate groups. In contrary, nonbridging oxygen ions linked to Pb2+ ions are situated at the middle phosphate structure. Changes in the density and molar volume manifest the mixed matrices nature of the studied glasses.
- Publication:
-
Journal of Non Crystalline Solids
- Pub Date:
- April 2020
- DOI:
- 10.1016/j.jnoncrysol.2020.119945
- Bibcode:
- 2020JNCS..53419945M
- Keywords:
-
- BaO-PbO-P<SUB>2</SUB>O<SUB>5</SUB> glasses;
- Quantitative FTIR analysis;
- Density;
- Molar volume;
- Electric conductivity