新型GeS_2-Ga_2S_3-KI玻璃性能的研究

Investigation of GeS_2-Ga_2S_3-KI Chalcohalide Glasses

用传统熔融淬冷法制备了新型硫卤玻璃(100-x)(80GeS2-20Ga2S3)-xKI(x=0,10,20mol%).利用差热分析、可见/近红外吸收光谱、红外透射光谱等技术对准三元硫卤玻璃体系GeS2-Ga2S3-KI的组成、结构和性能关系进行了研究.分析结果表明:GeS2-Ga2S3-KI三元系统玻璃具有较宽的玻璃形成区;当KI的含量为10mol%时,玻璃热稳定性最好;随着KI的加入,玻璃的红外截止波长无明显变化,皆为12.5μm;然而随着局域电位场的增大,玻璃的短波吸收限向短波方向发生了移动,光学带隙存在增大趋势.

（100-x）（80GeS2-20Ga2S3）-xKI（x=0,10,20 mol%） chalcohalide glasses are prepared by traditional melt-quenching method.The differential thermal analysis（DTA）,visible/near-infrared absorption spectroscopy,infrared transmission spectra are adopt to the analysis of the relationships of the composition,structure and properties of the GeS2-Ga2S3-KI ternary glass system.The results show that：the glass-forming regions of GeS2-Ga2S3-KI ternary system glasses are fairly big.When the content of KI is 10 mol%,the glass is of the best thermal stability.With the addition of KI,there has been no significant change in infrared cut-off wavelength of the glasses which are all 12.5 μm.While with the local field potentials increasing,the short-wave absorption of the glasses shifts to the shorter wavelength and the optical band gap increases.