Development of commercially viable high-[Tc] Bi-2223 superconductor tapes
- Argonne National Lab., IL (United States). Materials and Components Technology Div.
- Intermagnetics General Corp., Guilderland, NY (United States)
- IGC/Advanced Superconductors, Inc., Waterbury, CT (United States)
Long lengths of flexible Ag-clad Bi-2223 Superconductors have been fabricated by the powder-in-tube technique using prereacted, poly-phase, Pb-doped Bi-Sr-Ca-Cu-O powders. At liquid helium (4.2 K) temperature, improved process conditions yielded transport critical current density (J[sub c]) values greater than 10[sup 5] A/cm[sup 2] at zero field; at liquid nitrogen (77K) temperature, the J[sub c] values of short tape samples exceeded 4 [times] 10[sup 4] A/cm[sub 2]. Rolled tapes are cut into lengths up to 2 - meters long and are used in parallel to fabricate small superconducting pancake coils by the wind-and-react'' technique. The cots are characterized at 77K and 4.2 K. The J[sub c] of the coils are up to 80% of the short, rolled sample result at 77 K. The coils exhibited these results even after being cooled and warmed several times between ambient, 77 K and 4.2 K, indicating their stability following thermal cycling.
- Research Organization:
- Argonne National Lab., IL (United States). Materials and Components Technology Div.
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6563438
- Report Number(s):
- ANL/MCT/CP-78926; CONF-930235-1; ON: DE93009966
- Resource Relation:
- Conference: 5. annual international superconductor applications conference, San Jose, CA (United States), 1-3 Feb 1993
- Country of Publication:
- United States
- Language:
- English
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665412* - Superconducting Devices- (1992-)