Effect of CuI on the formation and properties of Te-based far infrared transmitting chalcogenide glasses

Abstract

A series of Ge-Te-CuI far infrared transmitting chalcohalide glasses were prepared by traditional melt-quenching method and the glass-forming region was determined. Properties measurements include density, DTA, XRD, SEM, Vis-NIR and infrared (IR) transmission spectra. The results show that with the addition of CuI, the glass-forming ability is improved and nearly 30 mol% CuI can be dissolved into the Ge(20)Te(80-x)(CuI)(x) glass system. The density and glass transition temperature of Ge-Te-CuI chalcohalide glasses are within the range 5.459-5.960 g cm(-3) and 150-184 degrees C, respectively. These glasses all have wide optical transmission window from 1.8 to 25 mu m and offer an alternative solution for far infrared transmitting materials. (C) 2010 Elsevier B.V. All rights reserved.