大尺寸熔融织构YBCO超导体的制备及磁浮性能  

Fabrication and Maglev Properties of Large Bulk Melt-Textured-Growth(MTG) YBCO Superconductor

作　　者：肖玲[1] 任洪涛[1] 王永兰[1] 

机构地区：[1]北京有色金属研究总院

出　　处：《中国稀土学报》1996年第3期224-228,共5页Journal of the Chinese Society of Rare Earths

摘　　要：采用熔融织构生长（ＭＴＧ）工艺结合籽晶技术制备出大尺寸ＹＢＣＯ超导块材。微观结构观察表明，其结晶取向在一定程度上得到了控制，而且晶畴尺寸比较大。测量了样品的磁浮性能，得到超导样品和永久磁铁之间的作用力与距离的关系曲线。直径２９ｍｍ、厚度１０ｍｍ的超导样品与表磁０．５Ｔ永久磁铁间的最大排斥力达到４．８Ｎ／ｃｍ２。磁浮性能表现出明显的各向异性。The fabrication of large, bulk high temperature superconducting YBCO samples was accomplished by MTG process using a seeding technique. The microstructure of the samples was observed by a polarization microscope. It is found that the samples have controlled orientation and large domains. The magnetic repulsion measurements as a function of distance were carried out. The maximum repulsion between the YBCO sample(29 mm in diameter and 10 urn thick)and a Nd-Fe-B permanent magnet with surface magnetic field of 0. 5 T measured at 77 K was 4. 8 N/cm2. The magnetic levitation on the samples exhibits anisotropic behaviour.

关 键 词：YBCO 超导体 熔融织构 磁浮性能 制备 

分 类 号：O511[理学—低温物理]