Glass formation in Sb2Se3MXn (metal halides)

Glass formation in Sb2Se3MXn (metal halides) has been studied. Glass transition temperatures, crystallization temperature and infrared transmission of some of the glasses were examined. Broad glass-forming regions were found in the Sb2Se3HgI2, Sb2Se3HgBr2 and Sb2Se3CuI with narrow glass-forming regions in Sb2Se3PbI2 and Sb2Se3PbBr2. No bulk glass formation was found in Sb2Se3CdBr2, Sb2Se3AgI, Sb2Se3AgBr, Sb2Se3TiI and Sb2Se3TiBr by quenching a silica glass ampoule (inner diameter 4.5 mm, outer diameter 6 mm) in water. The glass transition temperature ranges from 110 to 180°C and the difference between crystallization and glass transition temperatures ranges from 40 to 60°C. The infrared cut-off wavelengths of the glasses extend to 22 μm. Sb2Se3-based chalcogenide-halide glasses may have capabilities applicable to infrared optical fiber materials.