摘要
The critical current density Jc and n-value have been studied from 40 K to critical temperature for four types of Bi-system 2223 tapes with different sheaths.The experimental results demonstrate that the change of Jc can be divided into three parts and n-value has some decrease with a decrease in temperature.In engineering application,a proper working temperature can be selected to satisfy the practical requirement.Furthermore,the temperature effects on critical stress for Ag-sheath tape was also studied.The results demonstrate that the critical stress does not change monotonously with a decrease in temperature.It increases first,then decreases with the further decrease in temperature.
作者
WANG Zheng-Dao
CHEN Zhao-Jia
DUAN Zhen-Zhong
WANG Wen-Quan
王正道;陈兆甲;段镇忠;王温泉(Cryogenic Laboratory,Chinese Academy of Sciences,Beijing 100080;Institute of Physics,Chinese Academy of Sciences,Beijing 100080;Northwest Institute for Non-Ferrous Metal Research,Xi’an 710016;Beijing General Research Institute for Non-Ferrous Metals,Beijing 100080)
基金
Supported by the National Natural Science Foundation of China under Grant No.19732001.
