Bi-2212低电阻接头制备与低温实验测试  

Preparation and low-temperature experimental testing of low-resistance joints in Bi-2212

作　　者：朱华锦 周孟良 万佳昊 杨东昇 秦经刚 周超 汪键 高鹏 Zhu Huajin;Zhou Mengliang;Wan Jiahao;Yang DongSheng;Qin Jinggang;Zhou Chao;Wang Jian;Gao Peng(School of Mechanical Engineering,Anhui University of Science and Technology,Huainan 232001,China;Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230001,China;Institute of Plasma Physics,CAS,Hefei 230031,China)

机构地区：[1]安徽理工大学机械工程学院,淮南232001 [2]合肥综合性国家科学中心能源研究院,合肥230001 [3]中国科学院等离子体物理研究所,合肥230031

出　　处：《低温与超导》2024年第3期24-30,46,共8页Cryogenics and Superconductivity

基　　金：国家自然科学基金(52207035)资助。

摘　　要：低电阻接头的制备及应用有利于提升超导磁体的稳定性及磁场质量,本文利用高温银线烧结法制备了Bi-2212低电阻接头,利用低温材料测试平台对Bi-2212不同压缩扁样的临界电流和高温银线烧结接头进行测试,并分析磁场强度、接触长度、搭接面积等关键因子对接头电阻的影响。实验结果表明:采用新型接头制备工艺研制的Bi-2212接头,当长度达到30 mm,搭接面积达到32.7 mm^(2)时,在4.2 K、5 T背场环境下接头电阻可降至4.5×10^(-8)Ω,并趋于稳定,且磁场对其影响可忽略不计。The preparation and application of low-resistance joints are beneficial for enhancing the stability and magnetic field quality of superconducting magnets.Bi-2212 low-resistance joints were prepared using the high-temperature silver wire sintering method.Low-temperature experimental testing was conducted to measure the critical current of different compressed flat Bi-2212 samples and the high-temperature silver wire sintered joints.The effects of key factors such as magnetic field strength,contact length,and overlap area on joint resistance were analyzed.Experimental results indicate that Bi-2212 joints prepared using the novel joint preparation technique can achieve a resistance of 4.5×10^(-8)Ω when the length reaches 30 mm and the overlap area reaches 32.7 mm^(2) under a 4.2 K,5 T background magnetic field environment,and tend to stabilize,with negligible influence from the magnetic field.

关 键 词：BI-2212 低电阻接头 高温银线烧结法 

分 类 号：TM26[一般工业技术—材料科学与工程]