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Large, single grain (RE)BCO superconductors for high magnetic field and microwave device applications

用于高磁场和微波设备应用的大型单晶 (RE)BCO 超导体

基本信息

批准号：
GR/S52865/02
负责人：
Hari Babu Nadendla
金额：
--
依托单位：
Brunel University London
依托单位国家：
英国
项目类别：
Fellowship
财政年份：
2006
资助国家：
英国
起止时间：
2006 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=GR%2FS52865%2F02
关键词：
Large single grain RE BCO

项目摘要

(RE)-Ba-Cu-O bulk high temperature superconductors (HTS) have the potential to generate large magnetic fields for use in stable magnetic field'bearings, flywheel energy storage systems and permanent magnet devices. For this purpose it is necessary to fabricate large, grain-boundary free bulk (RE)BCO materials. I propose here to fabricate large single grain superconductors with high trapped fields and evaluate their properties specifically for engineering applications. A detailed study of the seeing process, basic growth conditions for various (RE)BCO pseudo-single crystals and optimisation c fundamental processing parameters for various (RE)BCO systems will be carried out. In addition, study on theenhancement of the current density and the irreversibility filed of (RE)BCO single grains by engineering the microstructure, altering the carrier concentration and introduction of natural and artificial pinning centers to the bulk superconducting matrix will be carried out. The results obtained in this research work will be used to fabricate large single grain superconductors with very large trapped fields. Joining of the individual single grains is necessary for complex shaped superconductors, for specific medical and engineering applications and it is proposed in this work to develop effective joining process for HTS for this purpose. Current technologies for the fabrication of materials for HTS microwave applications have been based primarily on thin films. These thin film devices are limited to relatively simple microwav filter geometries and require sophisticated equipment for their deposition. We propose here to fabricate microwave resonators and filters of more complex geometries with low surface resistance from bulk superconductors. It is envisaged that this will enable fabrication of low cost, mass produced 3-D devices.

（RE）-Ba-Cu-O大块高温超导体（HTS）具有产生大磁场的潜力，可用于稳磁轴承、飞轮储能系统和永磁装置。为此，有必要制造大的、无晶界的体相（RE）BCO材料。在这里，我建议制造大的单颗粒超导体与高捕获场和评估其性能，特别是工程应用。详细研究了（RE）BCO赝单晶的生长过程、基本生长条件以及各种（RE）BCO体系的基本工艺参数的优化。此外，还将研究通过工程化微结构、改变载流子浓度以及在超导体基体中引入自然钉扎中心和人工钉扎中心来提高（RE）BCO单颗粒的电流密度和不可逆场。在这项研究工作中获得的结果将被用来制作大型单颗粒超导体具有非常大的陷阱场。对于复杂形状的超导体，对于特定的医学和工程应用，单个晶粒的接合是必要的，并且在这项工作中提出为此目的开发用于HTS的有效接合过程。当前用于制造用于HTS微波应用的材料的技术主要基于薄膜。这些薄膜器件限于相对简单的微波滤波器几何形状，并且需要复杂的设备来进行沉积。我们建议在这里制造微波谐振器和滤波器的更复杂的几何形状与低表面电阻的大块超导体。设想这将使得能够制造低成本、大规模生产的3D设备。