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Jolivet, V., Morizet, Y., Hamon, J., Paris, M. & Suzuki-Muresan, T. (2021) The influence of iodide on glass transition temperature of high-pressure nuclear waste glasses. J. Am. Ceram. Soc. 104 1360–1369.
Added by: Richard Baschera (2020-12-10 13:54:58) Last edited by: Richard Baschera (2021-03-23 08:30:09) |
| Type de référence: Article DOI: 10.1111/jace.17571 Numéro d'identification (ISBN etc.): 0002-7820 Clé BibTeX: Jolivet2021 Voir tous les détails bibliographiques  |
Catégories: IMN Mots-clés: Alkali, aluminoborosilicate glasses, behavior, borosilicate glass, glass transition, international simple glass, major sources, NMR, nuclear waste, silicate melts, structural-changes, Viscosity Créateurs: Hamon, Jolivet, Morizet, Paris, Suzuki-Muresan Collection: J. Am. Ceram. Soc. |
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| Résumé |
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The glass transition temperature (T-g) is a key parameter to investigate for application in nuclear waste immobilization in borosilicate glasses. T-g for several glasses containing iodine (I) has been measured in order to determine the I effect on T-g. Two series of glass composition (ISG and NH) containing up to 2.5 mol% I and synthesized under high pressure (0.5 to 1.5 GPa) have been investigated using differential scanning calorimetry (DSC). The I local environment in glasses has been determined using X-ray photoelectron spectroscopy and revealed that I is dissolved under its iodide form (I-). Results show that T-g is decreased with the I addition in the glass in agreement with previous results. We also observed that this T-g decrease is a strong function of glass composition. For NH, 2.5 mol% I induces a decrease of 24 degrees C in T-g, whereas for ISG, 1.2 mol% decreases the T-g by 64 degrees C. We interpret this difference as the result of the I dissolution mechanism and its effect on the polymerization of the boron network. The I dissolution in ISG is accompanied by a depolymerization of the boron network, whereas it is the opposite in NH. Although ISG corresponds to a standardized glass, for the particular case of I immobilization it appears less adequate than NH considering that the decrease in T-g for NH is small in comparison to ISG.
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Place: Hoboken Publisher: Wiley WOS:000591170600001
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