高温超导带材焊接接头电阻研究

摘要

This paper focused on the soldering of the high - temperature superconducting tapes. The effects of the contact length of soldering zone and solder layer thickness on the joint resistance were theoretical analyzed. The experimental results show that the increasing of the contact length of soldering zone could reduce the joint resistance. There is an inverse relationship between the contact length of the soldering zone and joint resistance. When the contact length of soldering zone is between 3cm to 5cm, the joint resistances of the both Bi2223/Ag and YBCO high - temperature superconducting tapes are controlled at the level of 10-8Ω, which can meet the requirements of stable operation of superconducting devices.%针对高温超导一代Bi2223/Ag带材、二代YBCO带材的焊接问题,理论计算分析了搭接长度、焊锡层厚度对带材接头电阻的影响,并对焊接长度对接头电阻的影响进行了实验验证.实验结果表明:增加焊接搭接长度可以减小接头电阻,两种超导带材的接头电阻皆同焊接搭接长度成反比.当焊接长度在3-5cm,焊料厚度在微米量级时,Bi2223/Ag带材、YBCO带材各自之间的接头电阻在液氮温度下均可控制在10-8Ω左右,能够满足超导装置稳定运行的要求.