Etudes des verres du pseudo-ternaire La2S3Bi2S3Ga2S3, en relation avec le diagramme de phases et la spectroscopie infra-rouge

The formation and properties of glasses based on Ga2S3-Bi2S3 system

“…In the Ga 2 S 3 -Bi 2 S 3 two-component system, all samples investigated for glass formation were devitrified by airquenching although the samples of the compositions 50GaS 3/2 • 50BiS 3/2 and 40GaS 3/2 • 60BiS 3/2 were partially vitrified by water-quenching. This partial glass-forming range in the two-component system is consistent with that previously reported [21,22]. However, in the threecomponent system with the addition of SnS, some samples with appropriate compositions were vitrified more easily; glasses were obtained in the compositional region ranging from 30 to 40 mol% of GaS 3/2 , 30 to 50 mol% of BiS 3/2 , and 10 to 30 mol% of SnS.…”

“…The gallium sulfide-containing glass systems reported to date are classified into two groups [21]; one is a group represented by the Ga-Ge-S glass system [22,24] and the other is a group represented by the Ga-La-S glass system [18,19]. The former is characterized by a glass composition, in which a sulfide other than Ga 2 S 3 is a main component that forms the glass network predominantly, and Ga 2 S 3 is incorporated into the network.…”

“…Although gallium sulfide is regarded as a glassforming compound, it needs other sulfides to be vitrified through a conventional melting-cooling procedure. Various sulfide glass systems containing gallium have been reported to date [18][19][20][21][22][23][24][25][26][27][28]. Among them, however, the Ge-free glass systems are still limited, and glasses reported as infrared transmitting materials contain a high content of Sb [13][14][15][16][17].…”

Magnetic Susceptibility and Local Structure of the Glasses Ga2S3(As2S3, PbS)–GeS2–MnS

“…It is known from the investigations of M. Guittard et al that high-quantity glasses based on Ga S (3,4) can be produced where Mn and another transitional metal have been introduced. These authors have reported that Mn adopts a coordination number of 6 in glasses of MnS}Ga S } GeS and have measured the temperature dependence of magnetic susceptibility of 0.4MnS}0.3Ga S } 0.3GeS (3).…”