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Structural and thermochemical properties of sodium magnesium phosphate glasses

hal.structure.identifierLaboratoire de Thermodynamique Appliquée [LR01S10]
dc.contributor.authorOUESLATI OMRANI, Refka
hal.structure.identifierLaboratoire de Chimie des Matériaux Solides
dc.contributor.authorKAOUTAR, Abdeltif
hal.structure.identifierLaboratoire de Chimie des Matériaux Solides
dc.contributor.authorEL JAZOULI, Abdelaziz
hal.structure.identifierLaboratoire de Physico-Chimie des Matériaux Inorganiques
dc.contributor.authorKRIMI, Saida
hal.structure.identifierLaboratoire de Thermodynamique Appliquée [LR01S10]
dc.contributor.authorKHATTECH, Ismail
hal.structure.identifierLaboratoire de Thermodynamique Appliquée [LR01S10]
dc.contributor.authorJEMAL, Mohamed
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVIDEAU, Jean-Jacques
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorCOUZI, Michel
dc.date.issued2015
dc.identifier.issn0925-8388
dc.description.abstractEnTernary phosphate based glasses with the general formula (50−x/2)Na2O–xMgO–(50−x/2)P2O5 (0 ⩽ x ⩽ 42.8 mol%), where the O/P ratio was varied from 3 to 3.75, have been prepared using a conventional melt quenching technique. Samples were investigated by means of density measurements, Fourier-transformed infrared (FTIR), Raman and 31P solid state magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopies, differential scanning calorimetry (DSC), inductively coupled plasma atomic emission spectroscopy (ICP/AES) analysis and calorimetric dissolution.The depolymerization of metaphosphate chains are described by the decrease of Q2 tetrahedral sites allowing the formation of pyrophosphate groups (Q1) revealed by spectroscopic investigations. As a result, the increase of density and glass transition temperature when x rises. Calorimetric study shows that the dissolution phenomenon is endothermic for a lower MgO content and becomes exothermic when magnesium oxide is gradually incorporated, suggesting the disruption of phosphate chains with increasing O/P ratio.
dc.language.isoen
dc.publisherElsevier
dc.subject.enMagnesium phosphate glasses
dc.subject.enCalorimetric dissolution
dc.subject.enDepolymerization
dc.subject.enMetaphosphate glasses
dc.subject.enPyrophosphate groups
dc.title.enStructural and thermochemical properties of sodium magnesium phosphate glasses
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jallcom.2015.01.297
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Alloys and Compounds
bordeaux.page766-771
bordeaux.volume632
bordeaux.peerReviewedoui
hal.identifierhal-01122724
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01122724v1
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