Coupled Vibrational Stirring: A New Method for Stirring Melts and Solutions during Crystal Growth

耦合振动搅拌：晶体生长过程中搅拌熔体和溶液的新方法

• 批准号: 9008389
• 负责人: Robert Feigelson
• 金额: $ 33.75万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-05-01 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9008389&HistoricalAwards=false
• 关键词: Coupled; Vibrational; Stirring; New; Method

This research is concerned with the use of coupled vibrational stirring during the growth of crystals. The technique is non- invasive, and works on the principle of removal of unwanted species segregating at the growth interface, thereby leading to improved uniformity of chemical composition of the growing crystal. The research examines the fluid dynamic aspects of the technique and its aplication to the Bridgman crystal growth process. Two specific areas are being emphasized: (1) effects of the technique on rate of growth, shape of the growth interface, chemical homogeneity, and formation of deffects, (2) parametric study of the mass and thermal transport during crystal growth, inclufing thermal gradients and thermal ossilations. THe materials systems being studied incllude cesium cadmium chloride, cadmium telluride, germanium, and silver gallium selenide.

这项研究涉及耦合振动的使用 在晶体生长期间搅拌。 技术是非- 侵入性的，并根据去除不需要的 物种在生长界面分离，从而导致 提高了生长的植物的化学成分的均匀性， 水晶 该研究考察了流体动力学方面的 坩埚下降法晶体生长技术及其应用 过程 两个具体领域正在得到强调：（1）影响 关于生长速度、生长形状的技术 界面、化学均匀性和缺陷的形成，（2） 晶体生长过程中质量和热输运的参数研究 生长，包括热梯度和热骨化。 的 正在研究的材料体系包括氯化铯镉， 碲化镉、锗和硒化银镓。