Abstract
Glasses in the system (40 − x) CaF 2−x ZnO–60 B 2O 3 with x = 5, 10, 15, 20, 25, 30, 35 mol% are prepared by the melt quenching method. The structural changes in the glasses with the variation of ZnO content are studied by FTIR spectroscopy with special reference to structural units of borates. From the analysis of the deconvoluted IR spectra of the glasses the mechanism of the conversion and reconversion of BO 3 ↔ BO 4 units is explained using the concept of the borate structural units i.e., di-, tri-, tetra-, penta-, ortho-, pyro- and metaborates.
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