Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Process of making wire – tape – cable – coil – or fiber
Patent
1994-11-28
1996-09-03
Gorski, Joseph M.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Process of making wire, tape, cable, coil, or fiber
29599, 505501, H01L 3924
Patent
active
055523765
ABSTRACT:
Powder having a composition in which the contents of Sr, Ca and Cu are increased so that an Sr-Ca-Cu-O phase is precipitated in addition to a 2223 phase of (Bi, Pb)-Sr-Ca-Cu is charged in a metal sheath, and this metal sheath is plastic-worked, then subjected to a primary heat treatment, then plastic-worked and further subjected to a secondary heat treatment. In the as-obtained bismuth oxide superconducting wire, pinning points based on the Sr-Ca-Cu-O phase are introduced into the superconductor, whereby magnetic field characteristic of the critical current density is improved.
REFERENCES:
patent: 5204316 (1993-04-01), Arendt et al.
Journal of Metals, vol. 43, No. 3, Mar. 1991, P. 21-24, K. Sandhage et al. "Critical Issues in the Opit Processing of High-Jc BSCCO Superconductors" refer to full descriptions and all drawings.
Japanese Journal of Applied Physics, vol. 28, No. 1, Jan. 1989, P. L82-L84, T. Hikata et al. "AG-Sheathed Bi--Pb--Sr--Ca--Cu--O Superconducting Wires with High Critical Current Density" Refer to full descriptions and all drawings.
Journal of Applied Physics, vol. 66, No. 6, 15, Sep. 1989, P. 2762-2764, H. Sekine et al. "Fabrication of Bi--(Pb)--Sr--Ca--Cu--O Mono- and Multifilamentary Superconductors and Improvement in Critical Current Density" Refer to full descriptions and all drawings.
Applied Physics Letters, vol. 58, No. 19, 13, May 1991, P. 2159-2161, T. A. Miller et al. "Strain Tolerant Microfilamentary Conductors of Bi2Sr2Ca1Cu208--d" Refer to full description and all drawings.
Kato Takeshi
Sato Ken'ichi
Director General of National Research Institute for Metals of Sc
Gorski Joseph M.
Research Development Corporation of Japan
Sumitomo Electric Industries Ltd.
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