Abstract
Influence of rare earth oxide (Nd 2O 3, Er 2O 3) addition on structure and glass properties has been investigated in PbO–B 2O 3–Al 2O 3–WO 3 system. With an increasing of rare earth concentration, intensity of OH band drastically decreases and IR transparency is slightly shifted to the longer wavelengths. The ErBO 3 crystalline phase has been identified basing on X-ray diffraction analysis. In opposite to the neodymium oxide, the erbium oxide plays the role as glass-modifier and influences on BO 3 ↔ BO 4 conversion, what was stated by infrared spectroscopy.
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