Abstract
Mixed potassium-lead borophosphate glasses were studied in two compositional series xK2O-(50-x)Pb0-10B2O3-40P2O5 and xK2O-(50-x)PbO-20B2O3-30P2O5 with x = 0, 10, 20, 30, 40 and 50 mol% K2O. The replacement of lead by potassium results in remarkable changes of the 11B and 31P MAS NMR, Raman and infrared spectra of these glasses. The observed changes in the spectra and properties of the glasses can be ascribed mainly to the differences in the space occupied by cations, the differences in electronegativity and the field strength of the corresponding cations.
