Preparation and properties of La2O3-Ga2S3 glass-ceramics for IR materials

摘要

IR transmitting glass-ceramics were prepared by isothermal treatments of La2O3-Ga2S3 glasses. The glass-ceramics were characterized by crystalline phases, microstructure, Vickers hardness and mid (3-5 mu m) IR transmittance. The Nd2S3-doped La2O3-Ga2S3 glass-ceramics consisting of a large numbers of (LaO)(4)Ga1.72S4.58, alpha-(LaO)GaS2 and alpha-Ga2S3 crystals with < 1 mu m in size exhibit a high hardness of 5.3 GPa and a mid IR transparency of > 60%. (c) 2006 Elsevier B.V. All rights reserved.