YBCO－纯铁组合筒的磁屏蔽性能  

Improve the Magnetic Shielding Effect of YBCO by Superposition of a Pure Iron Tube

作　　者：吴士玉[1] 海玉英[1] 刘柯钊[1] 张厚亮 赵正平 

机构地区：[1]四川材料与工艺研究所

出　　处：《低温与超导》1995年第4期27-34,共8页Cryogenics and Superconductivity

摘　　要：采用超导筒外叠套纯铁简的方法提高超导筒的磁屏蔽性能．经实验测试表明磁屏蔽性能提高约七倍，屏蔽系数达１．１×１０８．用ＳＥＭ观察陪衬试样断面的组织结构，与磁屏蔽性能测试结果对照．发现晶粒细化的超导筒磁屏蔽性能优于晶粒粗大的．烧结块材磁屏蔽性能与传输电流密度Ｊｃ有关，Ｊｃ高磁屏蔽性能好．还与烧结块材的组织结构密切相关．细小的柱状晶抵御外界磁通的渗透能力强．Improvement of magnetic shielding effects of sintered YBCO cylinder was achieved by outer superimposing a pore for singlecylindrical tube. Detected by SQUID or hore probe, the Bh got seven times comparing to which without pure iron cylinder,and the M could gut to 1.1×108. SEM analysis showed that smaller the graines were, better the magnetic shielding effects got.Also,the shielding character of sintered YBCO cylingder were on it's Jc and structure of sintered bulk. The finded styloid crystal cuoki resist outer magnetic field better

关 键 词：YBCO 超导体 纯铁筒 磁屏蔽 柱状晶 

分 类 号：O511.2[理学—低温物理]