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Article Dans Une Revue Journal of Physical Chemistry C Année : 2021

Nanoscale Crystallization Mechanisms in a GeSSbCsCl Glass Ceramic and Relationships with Mechanical and Optical Properties

Résumé

Crystallization of 62.5GeS2–12.5Sb2S3–25CsCl glass ceramic was investigated using different techniques from the macro- to nanoscale. A two-step crystallization process was evidenced, allowing for a direct correlation between the microstructural features and the evolution of the mechanical and optical properties. This two-step crystallization process starts with the nucleation of spherical CsCl crystals that progressively evolve toward a disc-shaped morphology when they grow. This transformation goes along with a local enrichment of Sb, leading also to a significant increase of the lattice parameter of the CsCl phase. These crystals significantly improve the mechanical behavior of the glass with only a small reduction of the infrared transmission properties.
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Dates et versions

hal-03178584 , version 1 (23-03-2021)

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Alexandre Morvan, E. Lavanant, L. Arnoldi, Xavier Sauvage, Laurent Calvez, et al.. Nanoscale Crystallization Mechanisms in a GeSSbCsCl Glass Ceramic and Relationships with Mechanical and Optical Properties. Journal of Physical Chemistry C, 2021, 125 (7), pp.4196-4204. ⟨10.1021/acs.jpcc.0c09889⟩. ⟨hal-03178584⟩
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