Bi-2212超导线材研究进展-中国材料进展

文章信息/Info

作者:: 熊志坤; 杨芳; 金利华; 贺一轩; 冯建情; 王大友; 闫果; 张平祥; 1．西北工业大学超导材料与应用技术研究院，陕西西安 710072 2．西北有色金属研究院超导材料研究所，陕西西安 710016 3．西安聚能医工科技有限公司，陕西西安 710028

Author(s):: XIONG Zhikun; YANG Fang; JIN Lihua; HE Yixuan; FENG Jianqing; WANG Dayou; YAN Guo; ZHANG Pingxiang; 1. Institute of Superconducting Materials and Applied Technology, Northwestern Polytechnical University,Xi’an 710072, China 2. Superconducting Materials Research Center, Northwest Institute for Nonferrous Metal Research,Xi’an 710016, China

Keywords:: superconducting material; Bi-2212 wire; wire preparation; powder in tube; critical current density

摘要:: Bi2Sr2CaCu2O8+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。

Abstract:: The Bi2Sr2CaCu2O8+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.