单畴YBCO超导块的生长及其磁浮特性  

THE GROWTH AND PROPERTIES OF SINGLE DOMAIN YBCO SUPERCONDUCTING DISK

作　　者：肖玲[1] 任洪涛[1] 焦玉磊[1] 常世安[1] 郑明辉[1] 

机构地区：[1]北京有色金属研究总院

出　　处：《低温物理学报》1998年第2期143-147,共5页Low Temperature Physical Letters

基　　金：国家超导技术联合研究开发中心和国家自然基金委员会资助

摘　　要：使用熔融织构生长（ＭＴＧ）工艺和顶部籽晶技术（ＴＳＴ）成功地制备了２～３ｃｍ直径的ＹＢＣＯ超导块材．结构分析证实具有某种特定表面生长花样的超导块材是单畴结构，其ｃ轴方向与柱状超导块的轴平行，与所用籽晶的ｃ轴一致．实验结果表明，超导块的磁浮特性与励磁过程有关．２６ｍｍ直径的单畴超导块，在零场冷条件下的最大磁浮力为４９牛顿，在场冷条件下的最大吸引力为１８牛顿．Abstract YBCO disks have been prepared by the melt textured growth (MTG) method with a seeding technique. In order to initiate grain growth of the YBCO disk, the MTG SmBa 2Cu 3O y quasi single crystal was placed on the top surface of YBCO disk as a seed. The X ray 2 θ and Φ scanning evaluate the single domain nature of YBCO disks. The maglev force was measured at liquid nitrogen temperature (～77K).The maximum magnetic repulsion between a YBCO disk (26mm in diameter) and a NdFeB magnet (25mm in diameter, 0.5T surface magnetic field) was 49N.

关 键 词：YBCO 超导块材 磁悬浮 单畴结构 

分 类 号：TM262.014[一般工业技术—材料科学与工程]