Abbas, L. and Bih, L. and Nadiri, A. and El Amraoui, Y. and Khemakhem, H. and Mezzane, D. (2007) Chemical durability of MoO3-P2O5 and K2O-MoO3-P2O5 glasses. Journal of Thermal Analysis and Calorimetry, 90 (2). pp. 453-458.

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Abstract

Thermal and chemical durability studies of the phosphate glasses belonging to the binary MoO3-P2O5 and the ternary K 2O-MoO3-P2O5 systems are reported. The chemical resistant attack tests carried out on the free alkaline MoO 3-P2O5 glasses show that the glass associated with the P/Mo ratio 2 has the high chemical durability. It shows also a high glass transition temperature value. The above findings are interpreted in terms of the cross-link density of the glasses and the strength of the M-O bonds (M=P, Mo). The influence of K2O addition on the properties (density, T g, durability) of this binary high water resistant glass is studied. It is found that the chemical durability along with the other physical properties are reduced by the incroporation of K2O in the glass matrix. The results were explained by assuming the formation of non-bridging oxygens and weak bonds. The mechanism of the dissolution of these glasses is proposed. © 2007 Springer Science+Business Media, LLC.

Item Type: Article
Uncontrolled Keywords: Glass; Molybdenum; Phosphates; Physical properties, Chemical durability; Glass matrix; Non-bridging oxygens, Molybdenum compounds
Subjects: Chemistry
Divisions: SCIENTIFIC PRODUCTION > Chemistry
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:45
URI: http://eprints.umi.ac.ma/id/eprint/2034

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