The spectroscopic studies of glasses in the BPO 4(GaPO 4)–SiO 2 system

Abstract

FTIR spectroscopic structural studies of gel-derived glasses in BPO 4–SiO 2 and BPO 4(GaPO 4)–SiO 2 systems are presented. 10B isotope substitution, spectra subtraction procedure and B 3+→Ga 3+ substitution were applied to distinguish the bands, originating from B–O, P–O and Si–O bond vibrations. The spectra of borophosphosilicate glasses containing 10B isotope have also been presented. Changes in the band positions helped to assign bands due to the different B–O bonds vibrations. The spectra subtraction procedure, due to the lowering of intensity of bands assigned to Si–O bonds vibrations, enabled to observe bands at 966 and 1225 cm −1, due to broken Si–O − bridges and (PO 2) − terminal groups, respectively.