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Structure and some physical properties of PbO–P2O5 glasses

✍ Scribed by K El-Egili; H Doweidar; Y.M Moustafa; I Abbas

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
319 KB
Volume
339
Category
Article
ISSN
0921-4526

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✦ Synopsis

Glasses in the system xPbO Á (100Àx)P 2 O 5 (x=25-60 mol%) have been investigated using IR spectroscopy and by means of density and electrical-resistivity measurements. The infrared spectra revealed that for PbOo50 mol% PbO enters the structure as a network modifier forming non-bridging oxygen ions. For PbO>50 mol% PbO also plays the role of a network former. The greater rate of density increase for PbO>50 mol% is due to the formation of PbO 4 units. The conductivity of these glasses depends mainly on the mobility of Pb 2+ ions. The variation of the electrical conductivity parameters upon changing the composition have been correlated with the structural changes in the glass matrix.

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