A multispectroscopic study of PbOxZnO0.6-x(P2O5)(0.4) glasses

The structure of ternary PbOx-ZnO(0.6-x)-(P2O5)(0.4) glasses has been inves tigated using nuclear magnetic resonance (NMR), Raman scattering and infrar ed spectroscopy (IR), over the compositional range from x = 0 to 0.6. The e volution of the P-31 NMR chemical shift and Raman high-frequency modes refl ects mainly the Zn/Pb substitution in these glasses. The NMR and Raman spec tra show that at high ZnO content, the phosphate network has a strong inter action with Zn cations through P-O-Zn bonds. In glasses with high lead cont ent, IR reflectivity spectra indicate that the phosphate network and lead c ation are less correlated and that Pb 2(+) has a mixed network former-netwo rk modifier role in the glass structure. (C) 2001 Elsevier Science B.V. All rights reserved.