熔融织构生长强磁浮YBCO超导块材的取向和结构  

The Orientation and Structure of YBCO Superconductor Disk for the Magnetic Suspension Application

作　　者：常世安[1] 任洪涛[1] 肖玲[1] 王永兰[1] 焦玉磊[1] 

机构地区：[1]北京有色金属研究总院

出　　处：《中国稀土学报》1998年第1期18-21,共4页Journal of the Chinese Society of Rare Earths

摘　　要：采用熔融织构生长法结合顶部Ｓｍ１２３籽晶技术，成功地制备了直径为２０ｍｍ的ＹＢＣＯ超导块材。该块材具有极强的磁性能。用Ｘ射线θ／２θ扫描和Φ扫描分析其结构表明，样品在三维方向上具有很强的择优取向，其ｃ、ａ、ｂ轴方向分别与Ｓｍ１２３籽晶的ｃ、ａ、ｂ轴方向一致，并具有类似单晶的结构特点。YBCO bulk superconductor in the shape of disk, about 20 mm in diameter, has been fabricated by melttextured growth method(MTG). It is found that the top seeding method is efficient to fabricate the material, which has excellent magnetic properties. XRD method was used for the characterization of crystal structure. It is indicated that the YBCO disk has highly preferred orientation in threedimensional directions and the c, a, baxis of crystal of the disk are the same in directions with those of the seeding used.The results show that the YBCO disk fabricated by MTG method in combination of the top seeding has the quasisingle grain structure.

关 键 词：钇 YBCO块材 超导块材 超导体 熔融织构生长法 

分 类 号：TM262[一般工业技术—材料科学与工程]