Process for producing a sheathed wire composed of a ceramic high

Details Process for producing a sheathed wire composed of a ceramic high Process for producing a sheathed wire composed of a ceramic high

1990-02-20

1991-08-27

Beck, Shrive

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505704, 505740, 29599, 427 62, 419 19, 419 8, 419 45, 419 48, H01L 3924, B22F 700

Patent

active

050433202

ABSTRACT:
A powder-in-tube method is disclosed for making a composite superconducting oxide wire which comprises loading a copper tube with a mixture composed of rare earth metal oxide, BaO.sub.2 and copper oxide or the finished superconductor powder and subjecting the loaded tube to drawing and a heat treatment at a temperature of up to 950.degree. C., wherein prior to loading the copper tube, the tube is oxidized at least on its inside to form a copper oxide layer having a thickness of 1 to 100 .mu.m and then a silver intermediate layer is inserted to the oxidized copper tube.

REFERENCES:
patent: 3139678 (1964-07-01), Anthony et al.
patent: 4749119 (1988-06-01), Esdonk et al.
patent: 4755493 (1988-07-01), Takeuchi et al.
Kajitani et al., "Neutron Diffraction Study on Orthorthombic YiBa.sub.2 Cu.sub.3 O.sub.6.74 and Tetragonal YBa.sub.2 Cu.sub.3 O.sub.6.05 ", Jpn. Appl. Phys. Lett. 26(7) May 1987, L1144-7.
Politis et al., "Superconductivity at 40K in La.sub.1-8 Sro.sub.2 CuO.sub.4 ", Z. Phys. B-Condensed Matter 66, pp. 141-146, Jun. 1987.
Jin et al., "High Tc Superconductors-Composite Wire Fabrication", Appl. Phys. Lett. 51(3), Jul. 1987, pp. 203-204.

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