Effect of excess Y_2O_3 addition on the physical properties of melt processed YBCO bulks

查看全文 作　　者：YANG Wanmin1,2,3, ZHOU Lian2, FENG Yong2, ZHANG Pingxiang2, WU Minzhi3 & W. GAWALEK3 1. Department of Physics, Shaanxi Normal University, Xi抋n 710062, China;2. Northwest Institute for Nonferrous Metal Research. Xi抋n 710016, China;3. Institute fur Physikalische Hochtechnologie e.V(IPHT), Jena, Germany Correspondence should be addressed to Yang Wanmin (email: wm-yang@sohu.com) Received June 27, 2003 出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2004年第47卷第1期,共7页 摘　　要：The YBCO superconductors with Y2O3 addition were prepared by a modified melt textured process and the effects of excess Y2O3 addition on the physical properties of melt textured YBCO have been investigated. It is found that the melt temperature of YBCO samples decreases drastically with the increasing Y2O3, and the maximum levitation forces are drastically different for samples with different Y2O3 addition. It is also found that the optimal Y2O3 addition to YBCO is about 10wt%. Considering the microstructure and the starting composition, the results are well discussed and interpreted. 关 键 词：YBCO superconductor, MELT growth, Y2O3 addition, LEVITATION force.