Disorder and Dynamics in Silicate and Aluminosilicate Liquids, Glasses, and Crystals Relevant to Geochemical Processes: Nuclear Magnetic Resonance Studies

与地球化学过程相关的硅酸盐和铝硅酸盐液体、玻璃和晶体的无序和动力学：核磁共振研究

• 批准号: 0408410
• 负责人: Jonathan Stebbins
• 金额: $ 84万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-10-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0408410&HistoricalAwards=false
• 关键词: Disorder; Dynamics; Silicate; Aluminosilicate; Liquids

The overall goal of this project is to better understand, and eventually to be able to predict, the thermodynamic and transport properties that ultimately control complex geological processes involving crystalline, glassy and molten silicate materials. The approach taken in the proposed research is to identify important problems where critical details of short- to intermediate-range structure are needed and can be elucidated by spectroscopy, make accurate measurements in appropriately simplified systems, and determine the consequences of the results for fundamental parameters such as configurational entropy, free energy, component activities, diffusivity, and viscosity. The primary research tool will continue to be solid-state Nuclear Magnetic Resonance (NMR), which is particularly useful for measuring the extent and nature of disorder and dynamics in silicates and oxides. This research will be a critical part of the scientific training of several Ph.D. students, and has close ties to other fields such as materials science, physical chemistry, and the physics of disordered systems.

该项目的总体目标是更好地了解并最终能够预测最终控制涉及结晶，玻璃和熔融硅酸盐材料的复杂地质过程的热力学和传输特性。在拟议的研究中采取的方法是确定重要的问题，其中需要短到中程结构的关键细节，可以通过光谱学来阐明，在适当简化的系统中进行准确的测量，并确定结果的后果基本参数，如构型熵，自由能，组分活性，扩散率和粘度。主要的研究工具将继续是固态核磁共振（NMR），这对测量硅酸盐和氧化物中的无序和动力学的程度和性质特别有用。这项研究将是几个博士科学培训的重要组成部分。学生，并与其他领域，如材料科学，物理化学和无序系统的物理学有着密切的联系。