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hal.structure.identifierLaboratoire de Physico-Chimie des Matériaux Inorganiques
dc.contributor.authorAÏT MOUSS, Rachid
hal.structure.identifierLaboratoire de Physico-Chimie des Matériaux Inorganiques
dc.contributor.authorKRIMI, Saida
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGLORIEUX, Benoit
hal.structure.identifierLaboratoire de Thermodynamique Appliquée
dc.contributor.authorKHATTECH, Ismail
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorCOUZI, Michel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCARDINAL, Thierry
hal.structure.identifierLaboratoire de Chimie des Matériaux Solides
dc.contributor.authorEL JAZOULI, Abdelaziz
dc.date.issued2016
dc.identifier.issn0022-3093
dc.description.abstractEnTwo series of glasses belonging to the ternary system Na2O - CuO - P2O5 where copper is introduced differently were synthesized by the conventional melt-quenching technique. Both series start from meta-phosphate composition NaPO3 (50Na2O-50P2O5). In the first series, the Na2O/P2O5 ratio is constant (Na2O/P2O5 = 1) and both Na2O and P2O5 oxides were replaced by copper oxide CuO: (50-x/2) Na2O - xCuO - (50-x/2) P2O5, 0 ≤ x ≤ 40. In the second series, the molar percentage of P2O5 is kept constant at 50 mol% and Na2O is replaced by CuO: (50-x)Na2O – xCuO – 50P2O5, 0 ≤ x ≤ 50. The glasses of these two series belong respectively to NaPO3-CuO and NaPO3-Cu(PO3)2 lines of the ternary system. These materials were characterized by density measurements, differential scanning calorimetry (DSC), X-ray diffraction (XRD), Raman, diffuse reflectance and dissolution heat measurements carried out with micro-calorimetry technique. Introduction of copper in meta-phosphate glass induces a blue/green color, and strengthens the vitreous network, as shown by the decrease of the molar volume (VM) and the increase of the glass transition temperature (Tg) when the content of CuO rises. The crystallization of the glasses, followed by XRD, leads to the formation of NaPO3, Na2CuP2O7 or Na2Cu(PO3)4 depending on the composition. Raman spectroscopy shows the conservation of the metaphosphate chains for NaPO3-Cu(PO3)2 glasses characterized by a constant O/P ratio (O/P = 3) and the depolymerization of these chains for NaPO3-CuO glasses where O/P ratio varies from 0 to 3.67. UV - visible study showed that the optical energy gap decreases by increasing the CuO concentration. Calorimetric study of the dissolution of glasses in acid solution shows a decrease of the dissolution enthalpy, for both series, when the CuO content increases. The dissolution phenomenon is endothermic for glasses with low content in CuO (x < 30) and exothermic for glasses rich in CuO.
dc.language.isoen
dc.publisherElsevier
dc.subject.enSodium copper phosphate
dc.subject.enGlasses
dc.subject.enDensity
dc.subject.enDSC
dc.subject.enXRD
dc.subject.enRaman
dc.subject.enUV-visible
dc.subject.enHeat of dissolution
dc.title.enStructural characterization and calorimetric dissolution behavior of Na2O-CuO-P2O5 glasses
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jnoncrysol.2016.08.029
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Non-Crystalline Solids
bordeaux.page144-152
bordeaux.volume452
bordeaux.peerReviewedoui
hal.identifierhal-01430379
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01430379v1
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