Properties of the GeS2–Ga2S3–CsCl–GeO2 oxy-chalcohalide glasses

Abstract In the present paper, the effects of GeO 2 on properties of GeS 2 –Ga 2 S 3 –CsCl chalcohalide glasses are presented. The absorption spectra, density, microhardness, DSC and the chemical durability are measured. Results show that the addition of GeO 2 remarkably improves the physical and chemical properties of the chalcohalide glass while the visible transmission spectrum is influenced little. The oxy-chalcohalide glass was also used as matrix for doping Tm 3 + (0.1 mol%) which shows the similar NIR luminescence spectrum as the GeS 2 –Ga 2 S 3 –CsCl chalcohalide counterpart. Some interesting structural evolutions are characterized by Raman spectra. The possible mechanism corresponding to the improved properties is discussed.