Density-Driven Liquid-Liquid Phase Transition in Yttrium Oxide-Aluminum Oxide Liquids

氧化钇-氧化铝液体中密度驱动的液-液相变

• 批准号: 9525984
• 负责人: Paul McMillan
• 金额: $ 4.99万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-15 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9525984&HistoricalAwards=false
• 关键词: Density; Driven; Liquid; Phase; Transition

9525984 McMillan The goal of this exploratory research is to examine the experimental evidence for a new type of behavior in the liquid state. A first-order phase transition between two liquid phases has been observed that is driven by entropy and density differences between the two liquids rather than by compositional fluctuations in the system yttrium oxide- aluminum oxide (Y2O3-Al2O3). The study of this liquid-liquid phase transition is important in order to further develop a fundamental understanding of the nature of the liquid state, and for the advancement of new materials useful in the construction of lasers. %%% Liquids in the Y2O3-Al2O3 system are of considerable commercial importance, because they give rise to the YAG family of laser host materials and other refractory ceramics. It is likely that the existence of the structural phase transformation in these liquids may be harnessed to tune the properties of crystals around the garnet crystal. The study of the new phenomena also has significant intrinsic scientific interests. ***

9525984麦克米兰，这项探索性研究的目标是检验液态中一种新类型行为的实验证据。观察到两液相之间的一级相变是由两种液体之间的熵和密度差异驱动的，而不是由Y_2O_3-Al_2O_3(Y_2O_3-Al_2O_3)系统的成分波动驱动的。对这种液-液相变的研究对于进一步从根本上理解液态的本质以及发展用于激光器结构的新材料具有重要意义。Y_2O_3-Al_2O_3系统中的%的液体具有相当大的商业价值，因为它们产生了激光基质材料和其他耐火陶瓷的YAG系列。这些液体中结构相变的存在很可能被利用来调节石榴石晶体周围晶体的性质。对这些新现象的研究也具有重大的内在科学价值。***