Formation and Properties of the Novel GeSe2-In2Se3-CsI Chalcohalide Glasses

International audienceThe glass-forming region of the GeSe2-In2Se3-CsI system was reported firstly. The dependence of glass properties on compositions as formulas of (1−2x)GeSe2−x(In2Se3-CsI) and (0.8−x)GeSe2−0.2In2Se3−xCsI was investigated. Properties measurements include density, DTA, Raman spectra, visible and near infrared, and infrared (IR) transmission spectra. Raman spectra show that [GeSe4/2] and [InSe4−xIx] tetrahedra are the main structural units in the network of the present glass system. Glasses show larger density (4.29-4.51 g/cm3), wider optical transmission window from 0.56 to 16 μm, and higher thermal stability characterized by the bigger ΔT (ΔT=Tx-Tg>110°C), which make them the promising candidate materials for IR optics