Synthesis and Study of Spectral-Luminescent Properties of Oxyfluoride Glasses of System BaF2–BaO–SiO2–B2O3–Bi2O3–ZnO–Y2O3 Activated by Oxides Er2O3 and Yb2O3

Oxyfluoride glasses in the BaF2–BaO–SiO2–B2O3–Bi2O3–ZnO–Y2O3 system were developed and synthesized with various ratios of the initial components. The spectral-luminescent properties of glasses activated with oxides Er2O3 and Yb2O3 were investigated. According to X-ray powder diffraction, all glass samples are X-ray amorphous, and the glass transition temperature (Tg) was determined. The study of the local structure using IR spectroscopy revealed that the glasses, regardless of composition, contain complex polyborate anions formed by the [BO3] and [BO4] groups. It was also shown that bismuth integrates into the glass network, forming Bi–O–Si bonds and network formers in the form of the [BiO6] groups.