Structure of zinc-lead-iron phosphate glasses

 

A. El Hadrami1,2, M. Mesnaoui1*, M. Maazaz1, C. Labrugère2, A. Wattiaux2, J-J. Videau2

1 Laboratoire de la Matière Condensée et de l’environnement, Centre d’Excellence de Recherche sur les Matériaux.                                      

Faculté des Sciences Semlalia, B.P 2390 Marrakech   (Maroc)

2 Institut de Chimie de la Matière Condensée de Bordeaux, CNRS, Université de Bordeaux I

87,Avenue du Dr A  Schweitzer, 33608 Pessac Cedex (France)

* Corresponding author. E-mail: mesnaoui@ucam.ac.ma

Received: 03 March 2006; revised version accepted: 28 June 2006

 

Abstract

A structural characterization of (100-x)(50P2O5-15ZnO-35PbO)-xFe2O3 phosphates glasses was accomplished using Raman, XPS, EPR and Mössbauer spectroscopies. The Raman study showed that the addition of Fe2O3 leads to the depolymerization of the glass network. The O1s spectrum was deconvoluted into three components, bridging oxygen atoms POP, non bridging oxygen atoms PO- and more covalent bonds PO¾M (Zn, Pb, and Fe). The Mössbauer spectroscopy reveals the presence of ferric and ferrous cations both located in octahedral sites while the ERP investigation indicates the coexistence of two kinds of trivalent iron sites.

 

Keywords :  Phosphate glasses; Raman spectroscopy;  XPS; Mössbauer spectroscopy; EPR.

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