Development of commercially viable high-{Tc} Bi-2223 superconductor tapes

Conference · Mon Feb 01 04:00:00 EST 1993

OSTI ID:10143338

Balachandran, U; Youngdahl, C A ^[1]; Haldar, P ^[2]; Motowidlo, L R ^[3]

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1. Argonne National Lab., IL (United States). Materials and Components Technology Div.
2. Intermagnetics General Corp., Guilderland, NY (United States)
3. 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, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10143338
• Report Number(s): ANL/MCT/CP--78926; CONF-930235--1; ON: DE93009966
• Country of Publication: United States
• Language: English

Related Subjects

665412
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
COPPER COMPOUNDS
HIGH-TC SUPERCONDUCTORS
OXYGEN COMPOUNDS
POWDERS
SILVER
STRONTIUM COMPOUNDS
SUPERCONDUCTING DEVICES
TEMPERATURE RANGE 0000-0013 K
THIN FILMS