【作者】 王小虎；

【导师】 赵修建；

【作者基本信息】 武汉理工大学 ， 材料学， 2003， 硕士

【摘要】 随着科学技术的进步，红外光纤材料越来越成为发达国家竞相研究开发的热点。硫卤玻璃由于各向同性和结构均匀且在可见光和红外波长区域具有高透光性等优点而成为一种理想的红外光纤材料。本文探索性地研究了As₂S₃-CdI₂和GeS₂-Ga₂S₃-KI两种硫卤玻璃系统的微观结构及成玻区、热性能和透红外等性能。试验性地进行了GeS₂-Ga₂S₃-KI的光纤拉制工作。 （1-x）As₂S₃-xCdI₂二元系统玻璃成玻区较小，采取空气淬冷时成玻区中x值大于0.04，而水淬冷时x值大于0.05。说明制备（1-x）As₂S₃-xCdI₂系统玻璃时的冷却速率对其玻璃形成区影响不大。随着x值的增大，其玻璃转变温度略有下降，为201～205℃，外观颜色有红色变为浅红色，又结合其可见光谱可知短波吸收限向短波方向移动，透红外曲线表明随着x值的增大，透红外截止波长基本不变，为13.8μm。拉曼光谱分析出其微结构为：离散的As-I键和Cd-S键或原子簇均匀地弥散于由硫桥连接的[AsS_3／2]单元构成的玻璃网络中。 GeS₂-Ga₂S₃-KI三元系统玻璃成玻区较大，KI含量高达57％时仍然形成玻璃。随着KI含量的增加，玻璃外观颜色由深黄色变成浅黄色，结合其可见光谱可知短波吸收限向短波方向移动，由红外透过光谱可知其截止波长无明显变化，为11.5μm。由DTA曲线可知T_g为236～365℃，T_c为414～664℃，大部分样品的T_c—T_g在100℃以上，表明该系统玻璃的形成能力良好。随着KI含量的增加，玻璃转变温度和密度均先降低后增加，表明玻璃结构先变疏松后紧密。由拉曼光谱等测试结果可知：一部分Ga₂S₃和KI可能会形成[GaKS₃I]四面体，彼此以顶角相连，因而可能与[GeS₄]四面体联接而进入网络。 由实验结果可知，此两种系统玻璃透红外截止波长比较大，是很有发展前途的新型红外光纤材料。更多还原

【Abstract】 With the development of science and technology, infrared optical fiber materials are becoming a more and more hotspot for developed countries to research and develop. Having isotropy, homogeneousness and high transmittance in visible and infrared region, chalcohalide glasses become ideal infrared optical fiber materials. This thesis researched the microstructures and some properties such as glass-forming regions, thermal properties and infrared transmittance etc of two chalcohalide glasses As2Ss-Cdl2 and GeS2-GaS3-KI. Furthermore we experimented fiber-drawing of GeS2-GaS3-KI chalcohalide glasses.The glass-forming regions of (1-x) As2S3-xCdI2 binary system glass are fairly small . The maximum x value in glass-forming region of this glass qunched in air was more than 4 mol % ,whereas more than 5 mol % when water quenching. With the increase of x value, the glass transition temperatures (Tg) of the seris of (1-x) As2S3-xCdl2 glass were 201~205癈, decreasing a little. Their colors ranged from red to tint red ,which explained the shore-wave absorption edge shifted towards shorter wavelength combined with the visible transmission spectra. The IR transmission spectra shew the IR cut-off wavelength did not change a lot with the addition of Cdl2. Based on the experimental data, the microstructure is considered to be that the discrete molecule species of Asia and Cd-S atomic bonds or clusters are homogeneously dispersed in a disordered polymer network formed by AsSa pyramids interconnected by sulfur bridges.The glass-forming regions of GeS2-Ga2S3-KI ternary system glasses are fairly big. Homogeneous glass could still be prepared with 57 mol% KI content. With the addition of KI, glass colors ranged from red to tint red , which explained the shore-wave absorption edge shifted towards shorter wavelength combined with the visible transmission spectra. TheIR transmission spectra show the IR cut-off wavelengths remain constant basically. DTA curves show that Tg is in the region 236- 365 C , Tc is in the region 414-664 癈 and Tc -Tg is more than 100 C, Thus this system glass has good glass-forming ability.Comprehensive studies indicated that two new system chalcohalide glasses have high IR cut-off wavelength and are able to act as strong candidates for IR optical fiber matetials.更多还原