TY - JOUR
T1 - Influence of sodium and gallium on the thermal, structural and electric properties of Ga2S3-Sb2S3glasses
AU - Sammoury, A.
AU - Kassem, M.
AU - Bokova, M.
AU - Fourmentin, M.
AU - Kassem, H.
AU - Hamady, M.
AU - Poupin, C.
AU - Cousin, R.
AU - Hamieh, T.
AU - Toufaily, J.
AU - Bychkov, E.
N1 - Publisher Copyright:
© 2025 Elsevier Ltd and Techna Group S.r.l. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
PY - 2025/1/1
Y1 - 2025/1/1
N2 - Bulk amorphous materials in the NaI–Ga2S3–Sb2S3 pseudo-ternary system were synthesized via the melt-quenching method. Five compositional series (A, B, C, D, and E) were designed to systematically vary NaI and Ga2S3 contents and investigate the effects of sodium and gallium on the glass-forming ability, density, thermal behaviour, electrical conductivity, and structure. X-ray diffraction confirmed a broad glass-forming region near Sb2S3-rich compositions. Thermal analyses showed that NaI incorporation lowers glass transition temperature, indicating network depolymerisation, while Ga2S3 addition enhances thermal stability. Electrical conductivity data showed divergent behaviours with increasing NaI content: non-monotonic response in gallium-deficient matrices versus a monotonic conductivity increase in gallium-rich glasses, with room temperature conductivities reaching up to 10-9 S cm-1. Raman spectroscopy supported by DFT modelling, revealed that increasing NaI content induces a structural reorganization characterized by a decline in Sb-S linkages and the formation of edge- and corner-sharing Ga–S units. The obtained results highlight the structural flexibility of the glass and the distinct roles of alkali halide and gallium chalcogenide on thermal properties, network topology and electrical properties.
AB - Bulk amorphous materials in the NaI–Ga2S3–Sb2S3 pseudo-ternary system were synthesized via the melt-quenching method. Five compositional series (A, B, C, D, and E) were designed to systematically vary NaI and Ga2S3 contents and investigate the effects of sodium and gallium on the glass-forming ability, density, thermal behaviour, electrical conductivity, and structure. X-ray diffraction confirmed a broad glass-forming region near Sb2S3-rich compositions. Thermal analyses showed that NaI incorporation lowers glass transition temperature, indicating network depolymerisation, while Ga2S3 addition enhances thermal stability. Electrical conductivity data showed divergent behaviours with increasing NaI content: non-monotonic response in gallium-deficient matrices versus a monotonic conductivity increase in gallium-rich glasses, with room temperature conductivities reaching up to 10-9 S cm-1. Raman spectroscopy supported by DFT modelling, revealed that increasing NaI content induces a structural reorganization characterized by a decline in Sb-S linkages and the formation of edge- and corner-sharing Ga–S units. The obtained results highlight the structural flexibility of the glass and the distinct roles of alkali halide and gallium chalcogenide on thermal properties, network topology and electrical properties.
U2 - 10.1016/j.ceramint.2025.12.345
DO - 10.1016/j.ceramint.2025.12.345
M3 - Article
SN - 0272-8842
JO - Ceramics International
JF - Ceramics International
ER -