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Article Dans Une Revue Journal of Non-Crystalline Solids Année : 2023

Super cold-crystallization of sodium iodine in selenium based chalco-halide glasses

Fabrice Celarie
Yann Gueguen
Xianghua Zhang
Mathieu Rozé
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Yann Guimond
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Résumé

Mechanical properties of a chalco-halide glass of the composition (0.72 GeSe2-0.28 Ga2Se3)75 NaI25 are studied during isothermal treatment below Tg (Tg-60 and DEG;C). The evolution of the Young's Modulus (E), the damping (Q-1) and the apparent viscosity (J-1, reverse of the creep rate) during heat treatment show that a structural rearrangement occurs in the glass below Tg. X-Ray diffraction and transmission measurements of the sample after heat treatment highlight the beginning of a super cold crystallization of cubic NaI within the glass after 1 month at Tg-60 and DEG;C. After 3 months of heat treatment, NaI crystals of about 31 nm size have been observed in the glass matrix by transmission electron microscopy.
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Dates et versions

hal-04221254 , version 1 (07-11-2023)

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Claire Fourmentin, Fabrice Celarie, Yann Gueguen, Louisiane Verger, Xianghua Zhang, et al.. Super cold-crystallization of sodium iodine in selenium based chalco-halide glasses. Journal of Non-Crystalline Solids, 2023, 617, ⟨10.1016/j.jnoncrysol.2023.122503⟩. ⟨hal-04221254⟩
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