用于限流器的Bi-2212超导筒的研制  

Fabrication of Bi-2212 Superconducting Rings for Fault Current Limiter Application

作　　者：孙晶[1] 赵启明[1] 吕朝阳[1] 王轶楠[1] 何砚发[1] 李景会[1] 王金星[1] 

机构地区：[1]东北大学理学院物理系,沈阳110006

出　　处：《低温与超导》2000年第4期32-34,共3页Cryogenics and Superconductivity

基　　金：国家自然科学基金资助项目 !(批准号 :597770 1 8)

摘　　要：采用部分熔化法在流氧气氛的旋转炉中 ,以 Ag箔为衬 ,成功制得直径 60 mm的 Bi- 2 2 1 2超导圆筒。加热初始粉到部分熔融状态 ,然后再冷却到 855℃以形成超导相 ,在富 N2 气氛下退火 ,并且从 70 0℃开始在纯 N2 气氛中冷却 ,这种工艺可以得到较好机械强度和外型的筒。XRD图象表明 Bi- 2 2 1 2筒中主要相为 Bi- 2 2 1 2超导相。 Bi- 2 2 1 2筒的临界电流密度为 1 0 0 Acm-2 ,Ic约为1 0Bi-2212 superconducting rigns (60mm in diameter) were processed in a rotating furnace in flowing oxygen using Ag foil as the substrate. The powder was heated to the partial melt state, cooled to 855℃ to develop superconducting phase, annealed in N 2 rich atmosphere, and finally cooled in N 2 from 700℃. Rings with high mechanical strength and nice shape were achieved by this process. XRD studies suggest that the as-processed Bi-2212 rings mainly consist of Bi-2212 superconducting phases. The Bi-2212 rings show a J c of 100Acm -2 with I c of 100A.

关 键 词：Bi-2212超导筒 部分熔化法 故障电流限制器 

分 类 号：TM711[电气工程—电力系统及自动化] TM26[一般工业技术—材料科学与工程]