Structure properties relationship in calcium ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Structure properties relationship in calcium sodium metaphosphate and polyphosphate glasses
Auteur(s) :
Atef Cherbib, Mohamed [Auteur]
Khattech, Ismail [Auteur]
Montagne, Lionel [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Revel, Bertrand [Auteur]
Jemal, Mohamed [Auteur]
Khattech, Ismail [Auteur]
Montagne, Lionel [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Revel, Bertrand [Auteur]
Jemal, Mohamed [Auteur]
Titre de la revue :
Journal of Non-Crystalline Solids
Numéro :
485
Pagination :
1-13
Éditeur :
Elsevier
Date de publication :
2018-04-01
Mot(s)-clé(s) en anglais :
Phosphate glasses structure
Chemical durability
Glass thermochemistry
Chemical durability
Glass thermochemistry
Discipline(s) HAL :
Chimie/Chimie inorganique
Résumé en anglais : [en]
Two series of glasses, the first with the formula (50-x/2)Na2O-xCaO-(50-x/2)P2O5 and an oxygen over phosphorus O/P ratio between 3 and 3.33 and the second with the composition (50-x)Na2O-xCaO-50P2O5 with an O/P = 3, were ...
Lire la suite >Two series of glasses, the first with the formula (50-x/2)Na2O-xCaO-(50-x/2)P2O5 and an oxygen over phosphorus O/P ratio between 3 and 3.33 and the second with the composition (50-x)Na2O-xCaO-50P2O5 with an O/P = 3, were obtained by melt quenching and studied in order to understand the effects of the CaO addition on the structure, physical properties and thermochemistry of polyphosphate and metaphosphate glasses. The spectroscopic investigations by Fourier Transform Infrared spectroscopy and 31P Magic Angle Spinning Nuclear Magnetic Resonance indicate in the first series, the shortening of the polyphosphate chains as CaO content increases. The spectra of the second series indicate the conservation of the metaphosphate chains. The density and thermal analysis measurement show the shrinking and the reticulation of the phosphate network as CaO is added in both series and the chemical durability of the glasses is enhanced by the substitution of the Psingle bondOsingle bondNa and Psingle bondOsingle bondP bonds by the Psingle bondOsingle bondCa– bonds. The thermochemical study shows the decrease of the dissolution heat of the glasses when the average chain length decreases and when the chemical durability of the glass increases. The molar enthalpy of mixing indicates the presence of two ranges of interaction in the metaphosphate compositions around 0–20% and 25–50% of CaO.Lire moins >
Lire la suite >Two series of glasses, the first with the formula (50-x/2)Na2O-xCaO-(50-x/2)P2O5 and an oxygen over phosphorus O/P ratio between 3 and 3.33 and the second with the composition (50-x)Na2O-xCaO-50P2O5 with an O/P = 3, were obtained by melt quenching and studied in order to understand the effects of the CaO addition on the structure, physical properties and thermochemistry of polyphosphate and metaphosphate glasses. The spectroscopic investigations by Fourier Transform Infrared spectroscopy and 31P Magic Angle Spinning Nuclear Magnetic Resonance indicate in the first series, the shortening of the polyphosphate chains as CaO content increases. The spectra of the second series indicate the conservation of the metaphosphate chains. The density and thermal analysis measurement show the shrinking and the reticulation of the phosphate network as CaO is added in both series and the chemical durability of the glasses is enhanced by the substitution of the Psingle bondOsingle bondNa and Psingle bondOsingle bondP bonds by the Psingle bondOsingle bondCa– bonds. The thermochemical study shows the decrease of the dissolution heat of the glasses when the average chain length decreases and when the chemical durability of the glass increases. The molar enthalpy of mixing indicates the presence of two ranges of interaction in the metaphosphate compositions around 0–20% and 25–50% of CaO.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
RMN et matériaux inorganiques (RM2I)
Date de dépôt :
2019-09-25T14:37:45Z
2021-03-16T10:08:01Z
2021-03-16T10:08:01Z
Fichiers
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