Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1989-10-16
1992-05-26
Roy, Upendra
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
427 62, 428930, 505702, 505706, 505725, 505736, 505739, C01F 1700, C22C 2400
Patent
active
051168103
ABSTRACT:
The invention relates to a process for making a superconducting connection between a pair of superconducting ceramic oxide pieces, each of the pieces having been formed by combining the metallic elements of the superconducting oxide in substantially the stoichiometric proportions needed to form the superconducting oxide into a precursor and forming the precursor into a shaped piece. The process comprises the steps of: contacting each of the shaped pieces with the other; connecting each of the shaped pieces to the other by means for forming a metallurgical bond between the shaped pieces; and oxidizing the connected shaped pieces under conditions sufficient to oxidize the metallic elements to the superconducting oxide.
In other embodiments of the invention, the process is for forming a superconducting connection between a pair of pieces having a superconducting ceramic oxide
oble metal composition; or for forming a joint between a superconducting ceramic oxide and a normal conductor.
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Yurek et al in MRS-Symp. Proc. vol. 99, ed. Brodsky et al, Dec. 1987, p. 619.
Pinkerton et al Appl. Phys. Letts. 53 (Aug. 1988) 438.
"EuBa.sub.2 Cu.sub.3 O.sub.x Produced by Oxidation of a Rapidly Solidified Precursor Alloy: An Alternative Preparation Method for High T.sub.c Cermanic Superconductors", by R. Haldar, Y. Z. Lu, and B. C. Giessen, Jun. 30, 1987, Barnett Institute of Chemical Analysis and Materials Science, Northeastern Univ., Boston, Massachusetts.
Craven Christopher A.
Joshi Chandrashekhar H.
American Superconductor Corporation
Roy Upendra
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