远红外Ge-Te-AgI硫卤玻璃光学性能  

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

作　　者：白坤[1] 聂秋华[1] 王训四[1] 戴世勋[1,2] 沈祥[1] 王国祥[1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安710119

出　　处：《光子学报》2011年第2期217-221,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.60878042);浙江省基金(No.R1101263);浙江省优秀青年教师;浙江省教育厅科研计划(No.20070964);宁波市自然科学基金(No.2010A610171);宁波大学王宽诚幸福基金资助

摘　　要：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25μm),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.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.

关 键 词：硫卤玻璃 光学性能 光学带隙 红外透过谱 

分 类 号：TQ171.734[化学工程—玻璃工业]