Ceramic Superconductors Produced By Advanced Ceramics Processing (Materials Research)

该项目将通过使用胶体技术来生产陶瓷超导体来研究先进的陶瓷加工方法。该项目使用的加工方法将使微观结构得到精确控制，从而揭示新材料的微观结构、性能和加工之间的关系。铜酸盐超导体的极端各向异性要求多晶团聚体中织构微结构的发展。因此，该项目将研究低温胶体加工技术，以在陶瓷坯体形成时获得优先的晶体取向。在该项目中，这可能是通过将超导体的颗粒分散在液氮中并在磁场存在的情况下进行过滤来实现的。研究人员将评估受控微结构样品在应变下的转变温度和临界电流密度的电特性。研究人员将建造设备来测量临界电流密度作为磁场中应变的函数。

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.