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Alkali Halide‐Doped Ga 2 S 3 –GeS 2 Glasses
Author(s) -
Bokova Maria,
Paraskiva Alla,
Kassem Mohammad,
Bychkov Eugene
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.202000115
Subject(s) - alkali metal , halide , analytical chemistry (journal) , conductivity , doping , radius , materials science , ionic radius , mineralogy , chemistry , inorganic chemistry , ion , computer security , optoelectronics , organic chemistry , chromatography , computer science
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.