Abstract
The glass forming range of PbO-TiO2-P2O5 system has been determined at 1000°C. The bulk density was measured and the molar volume have been calculated for both binary and ternary phosphate glasses. Infrared spectroscopy has been used in 1500-400 cm-1 region to assess structural changes taking place along the glass region of the lines x PbO-(1-x)P2O5 and xPbO-0.01TiO2-(0.99-x)P2O5 by gradual passage from v-P2O5 network to the end point of the glass forming domain (x=0,64). The infrared deconvolution analysis has revealed that the stretching vibration of phosphoryl group persists in all investigated glasses up to x=0,64. This feature has been ascribed to the fact that the P=O is not completely ruptured regardless the breakdown of the covalent phosphate glass network.
