Physical properties and chemical durability

of zinc-lead-iron phosphate glasses

 

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

1 Laboratoire de la Matière Condensée et de l’environnement ,du 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:27 June 2006

Abstract

     This study provides experimental data on the physical properties and the chemical durability of zinc-lead-iron phosphate glasses with the general composition (100-x) (50P2O5-15ZnO-35PbO)-xFe2O3. The physical properties show that the addition of Fe2O3 results in a high reticulation of the glass network in the composition range 0 £ x £ 10. As a consequence, a drastic improvement of the chemical durability was noticed and the dissolution mechanism was found to be controlled by a hydrolysis reaction with a non congruent dissolution.

 

Keywords :  Phosphate glasses; Physical properties;  Chemical durability; Toxic heavy metal.

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