Spectroscopic studies of the structure of sodium lead oligophosphate glasses

Authors: Abid M.; Elmoudane M.; Et-tabirou M.

Source: Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B, Volume 43, Number 5, 1 October 2002 , pp. 267-270(4)

Publisher: Society of Glass Technology

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Abstract:

(60-x)Na₂O.xPbO.40P₂O₅ (10

50) glasses were prepared and studied. Their density, oxygen molar volume, glass transition temperature, infrared spectroscopy and Raman spectroscopy have been investigated in order to understand the structural role of PbO in these glasses. Infrared and Raman spectra show that phosphate network depolymerisation occurs when x increases. When lead is added to binary sodium phosphate glass 60Na₂O. 40P₂O₅ structures consist of Pb tetrahedra linked to pyrophosphate units through Pb-O-P bonds. There is evidence for Pb-O-P linkages in the Raman from glasses with the highest PbO contents. The oxygen molar volume V₀, glass transition temperature T_g and structural data are correlated.

Document Type: Regular paper

Publication date: 2002-10-01