Synthesis and structural studies of Na2O-ZnO-ZnF2-B2O3 oxyfluoride glasses

Abstract

This paper describes the synthesis and spectroscopic studies of the glass system, 20Na 2 O-(20-x) ZnO-xZnF 2 -60B 2 O 3 (x = 0, 5, 10, 15, 20), prepared by melt quenching method. The analyses of DSC and XRD did not show the crystallinity of the glass sample. 11 B MAS-NMR shows the presence of sharp peak around -14 ppm. From the IR studies, the broadening of the peak around 1200-1400 and 800-1100 cm -1 shows the presence of mixed linkages like B-O-B, B-O-Zn in the network.

Alkaline earth zinc borate glasses doped with Cu2+ ions studied by EPR, optical and IR techniques

“…FTIR spectroscopy was used to obtain essential information concerning the arrangement of the structural units of these glasses. It is widely accepted that vibrational spectra of vitreous B 2 O 3 exhibit an intense band in the region 1600-1200 cm − 1 attributed to B-O symmetric stretching vibrations of BO 3 units, whereas the band in the region 1200-800 cm − 1 due to B-O band stretching of BO 4 tetrahedral units and third band around 700 cm − 1 assigned to B-O-B bend vibrations of borate network [1][2][3][4][5]. There is no significant variation with different concentrations of the Cu 2+ ions in the host.…”

“…Borate glasses possess scientific interest because of the occurrence of boron anomaly, and is incorporated into various glass systems as a flux material to attain materials of high technological application [1][2][3][4][5][6]. These compounds present an effective atomic number, which is very close to that of human tissue (Z eff = 7.42) [7].…”

Optical properties of praseodymium doped silver-borate glasses

“…Therefore, the structural investigation of boron in these glasses is one of the most attractive factors. In the borate glasses, B 3+ ions are triangularly coordinate by oxygen atoms and triangle units are corner bonded in a random configuration [4].…”