"

Cookies ussage consent

I agree.

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

Structure and properties of (50-x)CaO-xPbO-50P2O5 metaphosphate glasses

N. SAJAI1, A. CHAHINE1,* , M. ET-TABIROU1, M. TAIBI2, A. MAZZAH3

Affiliation

  1. Laboratoire de Physico-Chimie des Matériaux Vitreux et cristallisés, université Ibn Tofail, faculté des Sciences, Kénitra, Maroc
  2. LPCM, ENS Takadoum, Rabat, Maroc
  3. bLaboratoire de Spectrochimie Infrarouge et Raman, CNRS UMR 8516, Bâ t C5 Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq Cedex, France

Abstract

(50-x)CaO-xPbO-50P2O5 glasses (0 ≤ x ≤ 50) were synthesized by quenching technique. They have been characterised by Fourier transform infrared (FT-IR) and Raman spectroscopies. FT-IR and Raman spectral investigations reveal the formation of P-O-Pb bonds which replace P-O-Ca bonds and show that no metaphosphate network depolymerisation occurs when x increases. Thus, PbO acts as the network modifier. Systematic variations of the density and molar volume observed are in agreement with these results. The decrease in Tg with the substitution of PbO for CaO is due the lower energy for one Avogadro’s bond between Pb–O than that of Ca-O. The larger polarisability of lead oxide is responsible of the improved chemical durability of these glasses..

Keywords

Phosphate glasses, Density, DSC, Infrared spectroscopy, Raman spectroscopy.

Citation

N. SAJAI, A. CHAHINE, M. ET-TABIROU, M. TAIBI, A. MAZZAH, Structure and properties of (50-x)CaO-xPbO-50P2O5 metaphosphate glasses, Optoelectronics and Advanced Materials - Rapid Communications, 6, 1-2, January-February 2012, pp.99-103 (2012).

Submitted at: Dec. 2, 2011

Accepted at: Feb. 20, 2012