银基Bi系2223相带材临界电流比对循环测试(RRT)的实验结果和分析  

EXPERIMENTAL RESULTS AND ANALYSIS OF CRITICAL CURRENT ROUND ROBIN TEST ON THE Ag SHEATHED 2223 BSCCO TAPE

作　　者：华崇远[1] 肖玲[1] 周其[1] 段镇中[2] 郭树权[3] 曹烈兆[4] 汪成友[4] 丁世英[5] 孙越[6] 杨乾声 

机构地区：[1]北京有色金属研究总院 [2]西北有色金属研究院 [3]中科院物理所国家超导实验室 [4]中国科技大学物理系 [5]南京大学物理系 [6]中科院上海冶金研究所 [7]国家超导中心

出　　处：《低温物理学报》1997年第6期410-419,共10页Low Temperature Physical Letters

基　　金：国家超导中心主持和资助

摘　　要：在国家超导中心主持下，国内六个实验室成功的开展了银基Ｂｉ系２２２３相带材临界电流循环比对测试（ＲＲＴ）实验．有２４个样品在各实验室间进行了并联循环测试，４个样品进行了串联循环测试．在零磁场、液氮温度和１μＶ／ｃｍ判据下，样品临界电流Ｉｃ测量的最大变化系数（ＣＯＶ）小于２．５％．液氮温度是影响Ｉｃ测量值的一个重要因素．在Ｉｃ测量时，液氮温度的测量精度应优于±０．１Ｋ，并应对测量的临界电流值作相应的温度修正．比对实验说明１μＶ／ｃｍ判据是一个相对合理，更能反映出样品本征Ｉｃ特征的判据．he interlaboratory comparison of critical current measurement on Ag sheathed 2223 BSCCO tapes were carried out between six domestic laboratories under support of National Center for R&D on superconductivity. Twenty four specimens were routed by parallel way and four specimens were routed by series way. Through the RRT, it can be concluded that the maximum coefficient of variation on I c measurement among the laboratories at zero magnetic field, 77K and criterion of 1μV/cm was less than 2.5%. The temperature of liquid Nitrogen is an important variable affecting I c measurement. Consequently, the accuracy of temperature measurement for liquid Nitrogen should be better than ±0.1K and correction on measured I c value against corresponding temperature is needed. In addition, the experimental results showed that the criterion of 1μV/cm is reasonable criterion compared with 10μV/cm.

关 键 词：超导材料 RRT 银基 Bi系2223相 COV 

分 类 号：TM262.06[一般工业技术—材料科学与工程]