摘要
Bi_(2)Sr_(2)CaCu_(2)O_(8+x)(Bi-2212)超导体有很高的临界转变温度和极高的上临界磁场,以及在高场下具有优异的载流性能,这使得Bi-2212成为制备高场超导磁体的绝佳材料。并且,Bi-2212是唯一可以制备成各向同性圆线的高温超导材料,极大地简化了Bi-2212超导电缆和线圈的制备工艺。所以Bi-2212在强磁场领域,如核磁共振、磁悬浮列车和未来可控核聚变装置等表现出极大的应用潜力。简述了Bi-2212多芯线材的制备工艺,包括粉末装管工艺以及相应的前驱体粉末的制备方法、线材加工技术和部分熔融热处理工艺等,总结了影响Bi-2212超导线材临界电流密度的主要因素以及提高Bi-2212超导线材临界电流密度的方法。
The Bi_(2)Sr_(2)CaCu_(2)O_(8+x)(Bi-2212)superconductor exhibits exceptionally high critical transition temperature and upper critical magnetic field,along with outstanding current-carrying capabilities under high magnetic fields.These characteristics make Bi-2212 an ideal material for high-field superconducting magnet fabrication.Furthermore,Bi-2212 stands as the only high-temperature superconductor that can be fabricated into isotropic round wires,significantly simplifying the manufacturing processes of Bi-2212 superconducting cables and coils.Consequently,Bi-2212 demonstrates substantial application potential in high-field domains such as nuclear magnetic resonance,magnetically levitated train,and future controlled nuclear fusion devices.This article briefly describes the fabrication processes of Bi-2212 multifilamentary wires,including the powder-in-tube method,preparation techniques for precursor powders,wire processing technologies,and partial melting heat treatment processes.Furthermore,the key factors influencing the critical current density of Bi-2212 superconducting wires are summarized and strategies for enhancing their critical current density are discussed.
作者
熊志坤
杨芳
金利华
贺一轩
冯建情
王大友
闫果
张平祥
XIONG Zhikun;YANG Fang;JIN Lihua;HE Yixuan;FENG Jianqing;WANG Dayou;YAN Guo;ZHANG Pingxiang(Institute of Superconducting Materials and Applied Technology,Northwestern Polytechnical University,Xi an 710072,China;Superconducting Materials Research Center,Northwest Institute for Non-ferrous Metal Research,Xi an 710016,China;Xi an Juneng Medical Engineering Technologies Co.,Ltd.,Xi an 710028,China)
出处
《中国材料进展》
北大核心
2025年第3期253-259,共7页
Materials China
基金
国家重点研发计划项目(2021YFB3800200)。
作者简介
第一作者:熊志坤,男,2000年生,硕士研究生;通讯作者:杨芳,女,1980年生,研究员,博士生导师,Email:yangfang@nwpu.edu.cn。
