New oxychloride lead borate glasses in the xPbCl₂–(50-0.5x)PbO–(50-0.5x)B₂O₃ system were synthesized with a maximum lead chloride content of 40 mol%. The characteristic temperatures and mechanical and optical properties were studied. The incorporation of lead chloride led to a significant expansion of the transparency range in the UV (up to 355 nm) and IR regions (up to 4710 nm). Decreases in the Vickers hardness, density, and glass transition temperature were the consequences of a change in the structure. The studied glasses are promising materials for photonics and IR optics. The structure of the PbCl₂–PbO–B₂O₃ system was analyzed in detail using vibrational spectroscopy and X-ray diffraction.

This paper discusses the properties of synthesized lead borate oxyfluoride PbF2–PbO–B2O3 glasses doped with Nd3+ ions at concentrations from 0.6×1020 to 25×1020 cm−3. The possibility of using them as a basis for obtaining transparent glass–crystal materials by controlled crystallization with precipitation of the fluoride crystalline phase is studied. The changes in the structure and optical properties of the glass–crystalline material by comparison with the initial glasses were monitored by X-ray phase analysis and Raman spectroscopy and by investigating the fluorescence characteristics of the Nd3+ ions.

Lead fluoroborate glasses doped with Eu³⁺ are synthesized, studied, and used to produce glassceramics by heat treatment. The structure of glass-ceramics is determined by X-ray diffraction. The optical, mechanical, and luminescent properties of the glass-ceramics are studied. The structure and spectral-luminescent properties of solid solutions in the PbF₂–EuF₃ system obtained by both solid-phase reaction and coprecipitation from solutions are investigated.

Barium borate glasses doped with complex Pb₄Lu₂YbF₁₇ fluoride have been synthesized and investigated. Heat treatment produced glass ceramics containing the crystalline BaF₂:Yb³⁺ phase. The changes in the structural and optical properties of the glass ceramics were revealed by X-ray diffraction, Raman spectroscopy, and luminescence spectroscopy of Yb³⁺ ions in polycrystalline Pb₄Lu₂YbF₁₇, initial glass, and glass ceramics.