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Habilitation à diriger des recherches

Apport de la RMN dans les matériaux vitreux : les bioverres et les verres de confinement, et dans les matériaux cimentaires

Abstract : My research work concerns 2 main themes: i) the doping of different glasses and their structural analysis – either by phosphorus in this case the glasses are used as bone substitutes called bioglasses belonging to the SiO2-Na2O-CaO-P2O5 system to improve the bioactivity or by nitrogen to increase their mechanical properties, or used as containment glass in order to stabilize certain radioactive waste containing significant quantities of phosphorus and/or molybdenum, ii) structural analysis of cementitious materials also used for conditioning short and medium-lived radioactive waste. The structural analysis for these two materials was carried out thanks to nuclear magnetic resonance of the solid (NMR) which was an essential tool to characterize them given that they are in one case disorganized materials, and in the second case the products resulting from hydration are poorly crystallized compounds in the form of a gel. Thus, with regard to bioglasses, the role of phosphorus has been studied to understand the mechanism of bioactivity as well as the role of nitrogen in increasing physico-chemical properties. As for cementitious materials, two issues were studied : the impact of the increase in temperature on the chemical structure and therefore on certain physico-chemical properties, and the existence of interactions between the cementitious materials and the waste or adjuvants.
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Habilitation à diriger des recherches
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https://hal-uphf.archives-ouvertes.fr/tel-03775336
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Submitted on : Monday, September 12, 2022 - 2:36:08 PM
Last modification on : Wednesday, September 14, 2022 - 1:17:00 PM

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  • HAL Id : tel-03775336, version 1

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Cyrille Albert-Mercier. Apport de la RMN dans les matériaux vitreux : les bioverres et les verres de confinement, et dans les matériaux cimentaires. Matériaux. Université Polytechnique Hauts-de-France, 2021. ⟨tel-03775336⟩

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