Method of making a ribbon-like or sheet-like superconducting oxi

Details Method of making a ribbon-like or sheet-like superconducting oxi Method of making a ribbon-like or sheet-like superconducting oxi

1991-02-15

1993-02-16

Beck, Shrive

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505733, 505704, 427 62, 427375, 4273762, 4273761, B05D 512, B05D 302

Patent

active

051871491

ABSTRACT:
A method of making a ribbon-like or sheet-like superconducting composite body is disclosed. The method is well suited for making long lengths (e.g.,>100m) of ribboon or large areas (e.g.,>100cm.sup.2) of sheet-like composite. The method comprises forming a Bi-Sr-Ca-Cu-oxide-containing layer on a metal (exemplarily Ag) substrate, and mechanically deforming (typically by rolling) the thus formed composite such that the oxide is densified to more than 80% of the theoretical density. Subsequently the oxide layer is at least partially melted and allowed to re-solidify such that a large portion of the oxide crystals has c-axis alignment. After appropriate heat treatment in an O.sub.2 -containing atmosphere, thus produced superconductor ribbons or sheets can have high J.sub.c).gtoreq.10.sup.4, frequently >10.sup.5 A/cm.sup.2) for temperatures less than about 20K and in magnetic fields less than about 5T.

REFERENCES:
patent: 4880771 (1989-11-01), Cava et al.
patent: 4952554 (1990-08-01), Jin et al.
patent: 5070071 (1991-12-01), Geballe et al.
Jin et al., "Fabrication of Dense Ba.sub.2 YCu.sub.3 O.sub.7-8 Superconductor Wire by Molten Oxide Processing", Appl. Phys. Lett. 51(12) Sep. 1987, pp. 943-945.
"Partial Melt Growth Process of Bi.sub.2 Sr.sub.1 Ca.sub.1 Cu.sub.2 O.sub.x Textured Tapes on Silver", by J. Kase et al., Japanese Journal of Applied Physics, vol. 29, No. 7, Jul. 1990, pp. L1096-L1099.
"Textured Thick Films of Bi.sub.2 Sr.sub.2 Ca.sub.1 Cu.sub.2 O.sub.x ", by D. R. Dietderich et al., Japanese Journal of Applied Physics, vol. 29, No. 7, Jul. 1990, pp. L1100-L1103.
"Phase Alignment in Ag-Clad Bi-Sr-Ca-Cu-O (2:2:1:2) Wires", by R. D. Ray, II et al., Applied Physics Letters, 57(27), Dec. 31, 1990, pp. 2948-2950.
"Critical Currents Near 10.sup.6 A cm.sup.-2 at 77K in Neutron-Irradiated Single-Crystal YBa.sub.2 Cu.sub.3 O.sub.7 ", by R. B. van Dover et al., Nature, vol. 342, Nov. 2, 1989, pp. 55-57.
"High-Field Critical Current Densities in Bi.sub.2 Sr.sub.2 Ca.sub.1 Cu.sub.2 O.sub.8 +.sub.x /Ag Wires", by K. Heine et al., Applied Physics Letters, 55(23), Dec. 4, 1989, pp. 2441-2443.
"Critical Currents and Flux Pinning in Ag Stabilized High T.sub.c Superconductor Wires", by J. Tenbrink et al., Cryogenics, 1990 vol. 30 May, pp. 422-426.
"Optimism Abounds for Superconductivity in 1991", Superconductor Week, vol. 5, No. 1, Jan. 7, 1991.
"Properties of Bi(Pb)-Sr-Ca-Cu-O Superconducting Tapes Prepared by the Doctor-Blade Process", by E. Yanagisawa et al., Applied Physics Letters, 54 (25), Jun. 19, 1989, pp. 2602-2604.
"A New High-T.sub.c Oxide Superconductor Without A Rare Earth Element", by H. Maeda et al., Japanese Journal of Applied Physics, vol. 27, No. 2, Feb., 1988, pp. L209-L210.
"High Critical Currents in Y-Ba-Cu-O Superconductors", by S. Jin et al., Applied Physics Letters, 52(24), Jun. 13, 1988, pp. 2074-2076.
"Large Magnetic Hysteresis in a Melt-Textured Y-Ba-Cu-O Superconductor", by S. Jin et al., Applied Physics Letters, 54(6), Feb. 6, 1988, pp. 584-586.

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