MRI: Development of a High-Pressure Laser Floating Zone Furnace

MRI：高压激光浮区炉的开发

• 批准号: 2216387
• 负责人: Pengcheng Dai
• 金额: $ 54.78万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2216387&HistoricalAwards=false
• 关键词: MRI; Development; Pressure; Laser; Floating

Advances in information technology, energy, and many other fields rely upon the development and characterization of materials with desirable mechanical, electrical, magnetic, and thermal properties. Investigators who first synthesize high-quality, bulk single crystals of novel materials are in an optimal position to conduct definitive studies of their fundamental properties. Moreover, these investigators are also well positioned to facilitate further development of these materials toward applications in advanced technologies. This project develops a high-pressure laser floating zone furnace, not commercially available, capable of growing single crystals of novel materials that cannot be grown any other way. The high-pressure laser floating zone furnace will be a part of Rice’s Shared Equipment Authority and therefore have a broad user base from Rice University and the extended research community in and around Houston, Texas. In addition to training undergraduate and graduate students in the art of growing single crystals using the furnace, the successful execution of this project will open areas of research currently not possible for faculty and students. These activities will broaden the avenues of research in solid-state science and will provide new opportunities for discoveries of novel phenomena in single crystals of quantum materials.Conventional laser floating zone furnaces are powerful tools used to grow high-quality single crystals of oxides, intermetallics, carbides, and silicides, as long as the melting temperature is below ~2,800°C, but the growth chamber is limited up to 300 bar gas pressure. Growing single crystals of more complex materials, however, requires special capabilities, particularly the use of high pressure in the growth chamber. This is because the boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas around it. Increasing the gas pressure to 1000 bar inside the chamber will dramatically enhance the opportunities to stabilize the melt, and therefore allowing growth of single crystals not possible with conventional laser floating zone furnace. Recently, the investigator at the University of California, Santa Barbara (UCSB), developed a novel design for a high-pressure laser floating zone furnace for operational pressures up to 1000 bars of gas pressure. The objective of this project is to continue this innovation through the design and construction of a next-generation high-pressure laser floating zone furnace at Rice University; it will be the first of its kind in Texas and the southern U.S. and will represent a continued advance in high-pressure floating zone technology for advanced crystal growth. With the development of an improved high-pressure laser floating zone furnace under 1000 bars of gas pressure, the investigators will be able to obtain entire new phase parameter regimes and grow single crystals not possible with a commercial instrument. The proposed furnace will be operated and maintained by Rice University’s Shared Equipment Authority, where it will be easily accessible not only to Rice researchers but also to researchers throughout Texas and the southern U.S., thereby significantly broadening the capacity to advance research in materials synthesis.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

信息技术，能源和许多其他领域的进步取决于具有理想的机械，电气，磁性和热性能的材料的开发和表征。首先合成高质量的新型材料单晶的研究者处于最佳位置，以对其基本特性进行确定的研究。此外，这些研究人员也有很好的位置，可以促进这些材料在高级技术中的应用。该项目开发了一个高压激光浮动区炉，无法商购，能够种植无法种植任何其他方式的新型材料的单晶。高压激光浮动区炉将是赖斯共享设备管理局的一部分，因此拥有赖斯大学和德克萨斯州休斯敦及其周围地区的扩展研究社区的广泛用户群。除了培训使用熔炉种植单晶的本科生和研究生培训本科生外，该项目的成功执行还将为教职员工和学生开放研究领域。这些活动将扩大固态科学研究的途径，并将为量子材料单晶发现新现象的新机会提供新的机会。常规的激光浮动区熔炉是用于生长氧化物，金属层，碳化石，碳水化合物和硅胶的高质量单晶晶体的强大工具，无论长期以来均高于limited limitions in light to limited to y 2,80000 cy cove to 3,80000 c cys of 〜2,800 s c cy cove and clistion。但是，生长更复杂的材料的单晶需要特殊的功能，尤其是在生长室中使用高压。这是因为液体的沸点是其蒸气压的温度等于周围气体的压力。将气体压力增加到腔室内的1000杆将极大地增加稳定熔体的机会，从而使传统的激光浮动区炉无法生长单晶的生长。最近，加利福尼亚大学圣塔芭芭拉分校（UCSB）的研究人员开发了一种新型设计，用于高压激光浮动区炉，用于运算压力高达1000杆的气压。该项目的目的是通过在赖斯大学的下一代高压激光浮动区炉子设计和建造来继续这项创新；这将是德克萨斯州和美国南部的第一个同类产品，并将代表高压浮动区技术的持续进步，以实现先进的水晶增长。随着改进的高压激光浮动区炉以1000棒气压的发展，研究人员将能够获得整个新相位参数状态，并使用商业仪器不可能生长单晶。拟议的炉子将由赖斯大学的共享设备授权进行操作和维护，在这里不仅可以访问赖斯研究人员，而且还可以访问德克萨斯州和美国南部的研究人员，从而大大扩大了提高材料合成研究的能力。这奖反映了NSF的法定任务，并通过使用基金会的智力效果来评估了NSF的法定任务，并以评估的评估值得评估。