Development of multilayer Bi2Sr2CaCu2Ox superconducting tapes
Source: Superconductor Science and Technology, Volume 13, Number 1, 2000 , pp. 23-28(6)
Publisher: IOP Publishing
Abstract:High critical density (Jc) over 500 kA cm-2(at 4.2 K and 10 T) was obtained in Bi2Sr2CaCu2Oxmultilayer superconducting tapes processed by the pre-annealing and intermediate rolling (PAIR) technique. The PAIR process was effective in creating a dense core with lower carbon content, resulting in homogeneous chemical reactions, small amount of impurity phases and good alignment of superconducting grains. In production of long tapes, reducing the carbon content was the most serious challenge. A Jcvalue of 7.1 ×105A cm-2at 4.2 K in self-field was obtained in a 100 m long tape when the carbon content could be controlled to be 0.002 wt%. We fabricated a double-pancake coil using a 100 m long tape and tested it at 4.2 K in backup fields. The coil generated 2 T in a backup field of 4 T.
Document Type: Miscellaneous
Affiliations: 1: Showa Electric Wire and Cable Co Ltd, Kawasaki-shi, Kanagawa 210-8660, Japan 2: National Research Institute for Metals, Tsukuba-shi, Ibaraki 305-0047, Japan 3: CREST, Japan Science and Technology Corporation, Tsukuba-shi, Ibaraki 305-0047, Japan
Publication date: 2000-01-01