Improvement of J{sub c} and grain alignment of Bi-2212/Ag multilayer tapes by pre-annealing and intermediate rolling process

Journal Article · Wed Dec 01 00:00:00 EST 1999 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1023/A:1022582825696· OSTI ID:20015347

Kitaguchi, Hitoshi; Miao, Hanping; Kumakura, Hiroaki; Togano, Kazumasa; Hasegawa, Takayo; Koizumi, Tsutomu

The high transport critical current density (J{sub c}) > 500 kA/cm{sup 2} at 4.2 K, 10 T is obtained in the Bi-2212/Ag multilayer tapes fabricated by using PAIR (Pre-Annealing and Intermediate Rolling) and melt-solidification process. This J{sub c} value is twice higher than existing high-quality Bi-2212/Ag tapes (250 kA/cm{sup 2}). By applying PAIR process to Bi-2212/Ag tapes, Bi-2212 grain alignment is much improved and a large J{sub c} enhancement is achieved. J{sub c} has been increased strongly by performing pre-annealing at 840 C in oxygen (1 atm) and intermediate rolling with 25% deformation.

• Research Organization: National Research Inst. for Metals, Tsukuba (JP)
• OSTI ID: 20015347
• Journal Information: Journal of Low Temperature Physics, Vol. 117, Issue 5-6; Conference: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: Dec 1999; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRITICAL CURRENT
CURRENT DENSITY
SUPERCONDUCTING COMPOSITES
SILVER ALLOYS
BISMUTH OXIDES
STRONTIUM OXIDES
CALCIUM OXIDES
HIGH-TC SUPERCONDUCTORS
FABRICATION
GRAIN ORIENTATION