Molecular Structure of Tellurium-Based Optical Glasses and Liquids by Spectroscopy and Calorimetry

通过光谱学和量热法研究碲基光学玻璃和液体的分子结构

• 批准号: 9207166
• 负责人: Punit Boolchand
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1998-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9207166&HistoricalAwards=false
• 关键词: Molecular; Structure; Tellurium; Based; Optical; Molecular; Structure; Tellurium; Based; Optical

The molecular structure of two new classes of tellurium-based optical glasses will be investigated using Mossbauer spectrosopy, Raman spectroscopy, and calorimetry. The alkaline and alkaline- earth tellurates will be alloyed with germanium to modify the glass transition temperatures of these amorphous materials. The fragility of corresponding glassy melts will be established by viscosity-and enthalpy-activation energies and thermal expansion measurements. The results will be correlated with aspects of glass molecular structure deducted from spectroscopy. Of particular interest is the average coordination around the probe ions (iodine and tellurium). On a basic level, the present glasses provide convenient systems to explore further the recently suggested correlation between rigidity percolation in glassy covalent networks and fragility of corresponding melts. On an applied level, the present thrust provides a basis to determine their viability for optical applications.

将使用Mossbauer光谱，拉曼光谱和量热法研究研究两种新的基于胎的光镜的分子结构。 碱性和碱 - 土的牙服将与锗合金，以修饰这些无定形材料的玻璃过渡温度。 相应玻璃融化的脆弱性将通过粘度和焓激活能和热膨胀测量来确定。 结果将与从光谱扣除的玻璃分子结构的各个方面相关。 特别令人感兴趣的是探针离子周围的平均配位（碘和牙龈盆地）。 在基本水平上，目前的眼镜提供了方便的系统，以进一步探索最近建议的玻璃共价网络中的刚度渗透与相应熔体的脆弱性之间的相关性。 在应用水平上，目前的推力为确定其光学应用的生存能力提供了基础。