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Theses

Etude des conditions de confinement du plomb et du cadmium dans des verres à base de métaphosphates de zinc

Abstract : This study fits into the investigation of new phosphate glasses with optimal physical and chemical properties as part of storage of heavy toxic metals such as Pb and Cd. Glasses using (100-x) (50P2O5-15ZnO-35PbO)-xFe2O3 and (100-z) [50P2O5-15ZnO-(35-y)PbO-yCdO]-zAl2O3, mol%, batch composition have been synthesized. The addition of iron and aluminium oxides in the based phosphate glasses induces an improvement of the properties, in particular the aqueous corrosion resistance, which is comparable to the one of silicate glasses. These results could be correlated to the formation of mixed network with enhanced phosphate connectivity in which the multiple coordination of cations contributes to form covalent bonds with oxygen atoms. Due to the moderate glass transition temperature, these glasses have potential applications in storage of toxic metals.
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https://tel.archives-ouvertes.fr/tel-00007223
Contributor : Stéphane Toulin <>
Submitted on : Tuesday, October 26, 2004 - 4:23:49 PM
Last modification on : Thursday, January 11, 2018 - 6:15:07 AM
Long-term archiving on: : Friday, April 2, 2010 - 8:42:33 PM

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  • HAL Id : tel-00007223, version 1

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Abdelouahab El Hadrami. Etude des conditions de confinement du plomb et du cadmium dans des verres à base de métaphosphates de zinc. Matériaux. Université Sciences et Technologies - Bordeaux I, 2003. Français. ⟨tel-00007223⟩

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