远红外Ge-Te-AgI硫卤玻璃光学性能

用传统熔融淬冷法制备了一系列(100－x)(GeTe4.3)－xAgI (x=5,10,20,30)硫卤玻璃.并通过阿基米德法、XRD衍射、差热分析、可见/近红外吸收光谱、红外透射光谱等手段研究了该硫卤玻璃的热稳定性和光学特性.研究表明随着AgI含量的增加,玻璃的密度从5.591 g·cm－3递增到6.314 g·cm－3|折射率从3.73上升到5.70|XRD衍射数据表明该玻璃体系在较宽的组分范围内没有微晶析出,说明成玻范围较宽|差热分析表明当x=5时玻璃有着最高的转变温度206 ℃|AgI含量增多时短波截止限发生红移,红外截止波长基本不变（均超过25 μm）,表明此硫卤玻璃材料在远红外领域有很大的潜在应用前景.

Optical Properties of Ge-Te-AgI Far Infrared Chalco-halide Glasses

 A series of (100-x)(GeTe4.3)-xAgI(x=5,10,20,30)chalcogenide glasses were prepared by traditional melt-quenching method.The density was obtained by the Archimedes principle.The thermal property was analyzed by XRD diffraction and DTA curves.The optical property was analyzed by UV-VIS-NIR absorption spectrum and Infrared transmission spectrum,respectively.The results show that with the increasing of AgI content,the density of the glasses increases from 5.591 g·cm-3 to 6.314 g·cm-3 and the glass system has high refractive index from 3.73 to 5.70.The glass samples are amorphous,resulting in a wide composition range of glass formation.A maximum glass transition temperatures value of Tg (206 ℃) was obtained for x=5.A red-shifting occurs in the short-wavelength absorption cutting-off edge and the infrared cut-off wavelength is nearly unchanged.The infrared transmission edge is beyond 25 μm,which provides an important candidate for the development of far-infrared Te-based chalcogenide glass materials.