Ceramic Superconductors Produced By Advanced Ceramics Processing (Materials Research)

通过先进陶瓷加工生产的陶瓷超导体（材料研究）

• 批准号: 8716731
• 负责人: Michael Cima
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-15 至 1989-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8716731&HistoricalAwards=false
• 关键词: Ceramic; Superconductors; Produced; Advanced; Ceramics

This project will investigate advanced ceramic processing methods through use of colloidal techniques to produce ceramic superconductors. The processing methods used in this project will allow the microstructures to be precisely controlled; thereby, revealing the relationship between microstructure, properties, and processing for the new class of materials. The extreme anisotropy of the cuprate superconductors necessitates the development of texture microstructures in polycrystalline aggregates. Therefore, the project will investigate cryogenic colloidal processing techniques to obtain preferential crystallographic orientation of grains as the ceramic greenbody is formed. This might be accomplished in the project by dispersing particles of the superconductor in liquid nitrogen and filtercasting in the presence of a magnetic field. The investigators will evaluate electrical characteristics of controlled microstructure samples with respect to transition temperature, and critical current densities while under strain. The investigators will construct equipment to measure the critical current density as a function of strain in a magnetic field.

本项目将研究先进的陶瓷加工方法 通过使用胶体技术生产陶瓷 超导体 本项目中使用的处理方法将 允许精确控制微结构;因此， 揭示了微观结构、性能和 新材料的加工。 的极端各向异性 铜氧化物超导体需要织构的发展 多晶聚集体中的微观结构。 因此 该项目将研究低温胶体加工技术， 获得晶粒的优先结晶取向， 形成陶瓷坯体。 这可以在 通过将超导体颗粒分散在液体中 氮气和在磁场存在下的过滤流延。的 研究人员将评估受控 微观结构样品相对于转变温度，和 临界电流密度。 调查人员 将建造设备来测量临界电流密度， 磁场中的应变函数。