Abstract
XPS Ols spectra were recorded for glasses in the binary PbO‐Ga2O3 and ternary PbO‐Bi2O3‐Ga2O3 systems. Large shoulders with chemical shifts of 1.4 to 1.9 eV were observed in the Ols spectra recorded from PbO‐Ga2O3 glasses. These shoulders were attributed to the presence of nonbridging oxygens in the structure. The shoulders indicated that, contrary to previous results, PbO was a network modifier as well as a charge compensator and network former. The addition of Bi2O3 reduced the number of nonbridging oxygens and, therefore, it was classified as an intermediate. Ga2O3 seemed to form GaO4− tetrahedra, constituting the backbone of the network structure. Glasses in the PbOBi2O3‐Ga2O3 system had their IR cutoff edges located at 7 μm with glass transition temperatures in the range of 320° to 400°C.
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