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

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.

两类新的碲基化合物的分子结构 光学玻璃将使用穆斯堡尔谱学进行研究， 拉曼光谱和量热法。 碱性和碱性- 地球碲酸盐将与锗形成合金以修饰玻璃 这些无定形材料的转变温度。 的 相应的玻璃熔体的脆性将通过以下方法确定： 粘滞活化能和热膨胀活化能 测量. 结果将与玻璃的方面相关 从光谱学推断出的分子结构。 特别 感兴趣的是探针离子（碘）周围的平均配位 和碲）。 在基本水平上，本发明的眼镜提供 方便的系统，以进一步探讨最近建议的 玻璃态共价键刚性逾渗的相关性 网络和相应熔体的脆弱性。 于所施加的 水平，目前的推力提供了一个基础，以确定他们的 光学应用的可行性。