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N°Spécial De Revue/Special Issue physica status solidi (b) Année : 2020

Alkali Halide‐Doped Ga2S3 –GeS2 Glasses

Résumé

Glass‐forming region, macroscopic properties, and electrical conductivity changes are systematically studied in the MY–Ga 2 S 3 –GeS 2 systems, where M = Na, K, Rb and Y = Cl, Br, I, as a function of alkali concentration, MY chemical composition, and Ga 2 S 3 /GeS 2 ratio using two composition lines: series A – (MY) x (Ga 2 S 3 ) 0.2–0.2 x (GeS 2 ) 0.8–0.8 x and series B – (MY) x (Ga 2 S 3 ) 0.2 + 0.2 x (GeS 2 ) 0.8−1.2 x . Glasses of series B are characterized by higher maximum MY concentration, increasing with the cation radius up to 66.7 mol% in case of RbCl. The halide nature is found to be less significant for the vitrification ability. The density of samples varies monotonically between the two end‐members of each series. Glass transition temperature decreases with increasing alkali concentration, ranging from 426 °C ( x = 0) to 237 °C for (RbCl) 67 (Ga 2 S 3 ) 33 sample. The conductivity of MY–Ga 2 S 3 –GeS 2 glasses decreases with increasing cation radius. The Ga 2 S 3 /GeS 2 ratio and the halide nature affect the conductivity weakly.
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Dates et versions

hal-04290916 , version 1 (17-11-2023)

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Maria Bokova, Alla Paraskiva, Mohammad Kassem, Eugene Bychkov. Alkali Halide‐Doped Ga2S3 –GeS2 Glasses. physica status solidi (b), 257 (11), 2020, The Structure of Non‐Crystalline Materials and Chalcogenide Functional Materials, ⟨10.1002/pssb.202000115⟩. ⟨hal-04290916⟩

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