Preparation and Properties of Glasses Based on feS2-Sb2S3-CsXiX=Cl,Br,IjSystems
Kohei KADONO, Rikiya FUJIWARA, Manabu ICHIKAWA, and Takashi WAKASUGI
Abstract:Halide-incorporated chalcogenide glasses, I.e., chalcohalide glasses, have received much attention as the third family of non-oxide glass systems for improving properties of chalcogenide glasses. In this technical note, we report a systematic research on the glass formation and properties of glasses based on GeS2-Sb2S3-CsX (X = Cl, Br, I) systems in which cesium halides are substituted for SbS3/2 of 60GeS2E40SbS3/2 glass. Glasses were obtained until 20 mol% substitution of CsCl and CsBr, and 25 mol% substitution of CsI for SbS3/2. By the substitution, glass transition temperatures lowered from 315 C by 60 K for CsCl, and by 40 K for CsBr and CsI. Densities decreased, and refractive indices at 980 nm decreased from 2.341 by about 0.2 for 20 mol% substitution. Absorption edges at short wavelength side blue-shifted while those of the long wavelength side did not change. Raman spectra were also measured for structural analysis. Key Words:Chalcohalide glass, Chalcogenide glass, Infrared transmission, Glass formation, Glass transition, Refractive index, Raman spectroscopy