Raman and infrared study of (PbO) x (P 2 O 5 ) (1− x ) glasses

Gwenn Le Saoût (1) , Patrick Simon (1) , Franck Fayon (1) , Annie Blin (1) , Yann Vaills (1)

1 CRMHT - Centre de recherches sur les matériaux à haute température

The structure of binary (PbO) x (P 2 O 5) .1−x/ glasses was investigated using Raman scattering and infrared spectroscopy, over the compositional range x =0.5-0.68. The distribution of the phosphate groups (PO 2) − , (PO 3) 2− ,(P 2 O 7) 4− and (PO 4) 3− , determined from the simulation of Raman spectra in the 800-1500 cm −1 wavenumber range, indicates a significant disproportionation reaction near the pyrophosphate composition and shows a phosphorus connectivity scheme in the glass structure in agreement with 31 P magic angle spinning NMR results. The low-wavenumber Raman spectra of glasses are discussed in the light of the spectra of crystals. The mode laying in the far-infrared region and due to lead-oxygen vibrations exhibits a composition-dependent wavenumber that correlates with bulk glass properties such as glass transition temperature.

Domaines: Chimie

Gwenn Le Saoût, Patrick Simon, Franck Fayon, Annie Blin, Yann Vaills. Raman and infrared study of (PbO) x (P 2 O 5 ) (1− x ) glasses. Journal of Raman Spectroscopy, 2002, 33 (9), pp.740-746. ⟨10.1002/jrs.911⟩. ⟨hal-03251325⟩