High Temperature Solid-Solid Reaction Kinetics Via Dynamic X-Ray Diffraction

通过动态 X 射线衍射研究高温固-固反应动力学

• 批准号: 8719929
• 负责人: William Thomson
• 金额: --
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-04-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8719929&HistoricalAwards=false
• 关键词: Temperature; Solid; Reaction; Kinetics; Via

Two reacting solid-state systems are investigated using dynamicx-ray diffraction (DXRD) and other techniques. The systems to be studied are (1) the reaction of calcium oxide and silica to form calcium silicates, and (2) the synthesis of mullite from colloidal boehmite and silica. The objectives of the study are (1) to obtain quantitative verification of DXRD-acquired data in a system of known kinetic behavior (calcium silicate), (2) to apply DXRD to a multiply reacting system (mullite), (3) to determine the effects of particle size and water vapor on the roles of diffusion and kinetics in solid-solid reactions, and (4) to determine the reaction sequence and rate-limiting steps in the production of sol-gel-derived mullite. This project includes the first application of DXRD to a system with unknown kinetics. This new technique, developed by the investigator, has the potential to provide more detailed information on solid-solid reacting systems than has been possible up to now.

使用动态 X 射线衍射 (DXRD) 和其他技术研究了两种反应固态系统。要研究的系统是（1）氧化钙和二氧化硅反应形成硅酸钙，以及（2）从胶体勃姆石和二氧化硅合成莫来石。该研究的目标是 (1) 在已知动力学行为的系统（硅酸钙）中对 DXRD 采集的数据进行定量验证，(2) 将 DXRD 应用于多重反应系统（莫来石），(3) 确定颗粒尺寸和水蒸气对固-固反应中扩散和动力学作用的影响，以及 (4) 确定反应顺序和限速步骤 溶胶-凝胶法莫来石的生产。该项目首次将 DXRD 应用于动力学未知的系统。研究人员开发的这项新技术有可能提供比迄今为止更详细的固-固反应系统信息。