Effect of gallium addition on physical and structural properties of Ge–S chalcogenide glasses

• Published in: Ceramics international Vol. 43; no. 15; pp. 12205 - 12208
• Main Authors: Zhu, Erwei, Lin, Changgui, Jiao, Qing, Song, Bao’an, Liu, Xueyun, Dai, Shixun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.10.2017
• Subjects: Chalcogenide glass; Glass transition temperature; Raman spectra; Structure; Chalcogenide glass; Raman spectra; Structure; Glass transition temperature
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2017.06.080

GeS2.5 chalcogenide glass was selected for studying effects of Ga addition on physical and structural properties. Glassy and partially crystallized samples of (100−x)GeS2.5−xGa (5mol% ≤ x ≤ 40mol%) were prepared, and their thermal and optical properties were characterized. With increasing Ga content (x), values of Tg and optical band gap of glasses initially increased and then decreased, showing a maximal value at x = 25mol%, that is, with stoichiometric composition of 85.7GeS2·14.3Ga2S3. These changes were discussed and correlated to evolution of network structure, which was investigated by Raman spectra recorded in glassy matrices of (100−x)GeS2.5−xGa (5mol% ≤ x ≤ 40mol%). This work contributes to understanding of composition–structure–property relationship of chalcogenide glasses.