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Title: Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates

Patent ·
OSTI ID:869241
 [1]
  1. Evergreen, CO
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An elongated, flexible superconductive wire or strip is fabricated by pulling it through and out of a melt of metal oxide material at a rate conducive to forming a crystalline coating of superconductive metal oxide material on an elongated, flexible substrate wire or strip. A coating of crystalline superconductive material, such as Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8, is annealed to effect conductive contact between adjacent crystalline structures in the coating material, which is then cooled to room temperature. The container for the melt can accommodate continuous passage of the substrate through the melt. Also, a second pass-through container can be used to simultaneously anneal and overcoat the superconductive coating with a hot metallic material, such as silver or silver alloy. A hollow, elongated tube casting method of forming an elongated, flexible superconductive wire includes drawing the melt by differential pressure into a heated tubular substrate.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-83CH10093
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 5304534
OSTI ID:
869241
Country of Publication:
United States
Language:
English

References (6)

Fabrication of dense Ba 2 YCu 3 O 7−δ superconductor wire by molten oxide processing journal September 1987
High-critical-temperature superconductor made from glass journal April 1988
Magnetic measurements of superconducting glass‐ceramic fine rods in Bi 1 Ca 1 Sr 1 Cu 2 Al 0.5 O x prepared under a temperature gradient journal October 1989
High T C superconductors—composite wire fabrication journal July 1987
Tape Conductor Fabrication Processes for High- T c Ba 2 YCu 3 O 7- y journal March 1988
Improvement of the critical current density in the silver sheathed Bi‐Pb‐Sr‐Ca‐Cu‐O superconducting tape journal April 1989

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