IR and Raman studies and effect of γ radiation on crystallization of some lead borate glasses containing Al2O3

IR and Raman spectra of glass ceramics based on PbO-Cr2O3-B2O3 glass composition system have been studied. The bands characteristic of BO3 and BO4 functional groups are present in all the samples. An incorporation of Al2O3 (up to ∼ 5 mol%) in the initial glass composition considerably changes the glass network structure and relative concentrations of BO3 and BO4 groups. The glasses irradiated with γ rays inhibit the crystallization into the Pb2O · CrO4 phase. They also show relatively smaller thermal conductivity. (author)