Collaborative Research: Structure-Property Relationships of Novel Rare Earth-Ultraphosphate Glasses

合作研究：新型稀土-超磷酸盐玻璃的结构-性能关系

• 批准号: 0305199
• 负责人: Gaya Marasinghe
• 金额: $ 28.57万
• 依托单位: University of North Dakota Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0305199&HistoricalAwards=false
• 关键词: Collaborative; Research; Structure; Property; Relationships

A multi-disciplinary collaboration between the Physics Department at the University of North Dakota (UND) and the Ceramic Engineering Department at the University of Missouri-Rolla (UMR) will develop and characterize new rare earth (RE) phosphate glasses that possess interesting optical and magnetic properties which make these glasses candidates for high-energy lasers, optical- and magneto-optical sensors, and other applications. Preliminary structural studies indicate an unusual dependence of rare earth coordination environment on the glass composition, especially for glasses containing less than 25 mol% rare earth oxide. Changes in RE coordination environment of these glasses appear to have a significant effect on their physical and optical properties. However, the exact nature of the relationships between these properties and the atomic structure of these glasses is poorly understood. The researchers at UND will obtain detailed information about the atomic structure, especially the coordination environments of the RE ions, using X-ray absorption spectroscopy, high-energy X-ray and neutron diffraction techniques, and IR/Raman spectroscopy. The UND team will investigate the magnetic properties as well. The research team at UMR will prepare optically active glasses (including Nd- and Er-phosphate compositions) and glasses with potentially large magnetic susceptibilities (e.g., Dy-phosphate compositions) using techniques to minimize contamination by water and transition metals. Optical characteristics, including absorption spectra, fluorescence spectra and fluorescence lifetimes, will also be characterized at UMR. As mentioned above, the new family of rare earth phosphate glasses mentioned above appear to be a potential candidate for important practical applications such as high-energy lasers, optical- and magneto-optical sensors. However, scientists and engineers planning to develop such applications need additional information on the atomic structure-property relationships of these glasses. The multi-disciplinary project described herein is designed to provide this important information. This project will bring together a group of science students/faculty from UND and a group of engineering students/faculty from UMR to work on a challenging research project. Such cross-disciplinary research opportunities are rare, especially at the student level, and quite beneficial to all researchers involved.

北达科他州大学（UND）物理系和密苏里大学罗拉分校（UMR）陶瓷工程系之间的多学科合作将开发和表征新的稀土（RE）磷酸盐玻璃，这些玻璃具有有趣的光学和磁性，使这些玻璃成为高能激光器、光学和磁光传感器以及其他应用的候选者。 初步的结构研究表明，稀土配位环境对玻璃组合物的不寻常的依赖性，特别是对于含有小于25摩尔%的稀土氧化物的玻璃。 稀土配位环境的变化对玻璃的物理和光学性能有重要影响。然而，这些性质和这些玻璃的原子结构之间的关系的确切性质知之甚少。 UND的研究人员将利用X射线吸收光谱、高能X射线和中子衍射技术以及IR/拉曼光谱获得有关原子结构的详细信息，特别是稀土离子的配位环境。UND团队还将研究磁性。UMR的研究小组将制备光学活性玻璃（包括Nd-和Er-磷酸盐组合物）和具有潜在大磁致伸缩性的玻璃（例如，Dy-phosphate组合物）使用最小化水和过渡金属污染的技术。光学特性，包括吸收光谱，荧光光谱和荧光寿命，也将在UMR的特点。 如上所述，上述稀土磷酸盐玻璃的新家族似乎是重要的实际应用，如高能激光器，光学和磁光传感器的潜在候选者。 然而，计划开发此类应用的科学家和工程师需要关于这些玻璃的原子结构-性质关系的额外信息。 本文所述的多学科项目旨在提供这一重要信息。该项目将汇集一组来自UND的科学学生/教师和一组来自UMR的工程学生/教师，致力于一个具有挑战性的研究项目。 这种跨学科的研究机会是罕见的，特别是在学生的水平，并相当有利于所有参与研究人员。