| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Current Issues and Functional Applications
|
| Presentation Title |
D-16: Structure and Properties of Lead Borate and Lead Alumino-borate Glasses |
| Author(s) |
Elizabeth M. Tsekrekas, Nagia S Tagiara, Randall E Youngman, Efstratios I Kamitsos, Alexis G Clare |
| On-Site Speaker (Planned) |
Elizabeth M. Tsekrekas |
| Abstract Scope |
Lead borate glasses in the system xPbO-(100-x)B2O3 made in platinum and alumina crucibles have been prepared and investigated by Raman, infrared reflectance and NMR spectroscopy to qualitatively determine the effect of Al2O3 contamination on the network. It was found that glasses melted in Al2O3 crucibles resulted in an expansion of the formation region from 30 < x < 80 to 20 < x < 85 as a result of alumina contamination. Both the Raman and infrared data suggest that the addition of Al2O3 to the network results in the under-modification of the borate network. This is further reflected in the low frequency Raman and infrared, which relates to the PbO network, where the Pb-O bond remains predominately a network modifier for a larger compositional range, suggesting the formation of AlO4 units charged balanced by Pb2+. |