Process of preparing yttrium based superconductors

Details Process of preparing yttrium based superconductors Process of preparing yttrium based superconductors

1991-12-31

1993-09-28

Group, Karl

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505733, 505742, 501152, 501123, H01B 1206

Patent

active

052486605

ABSTRACT:
A process of preparing a yttrium based superconductor including partial melting a body of YBa.sub.2 Cu.sub.3 O.sub.y compound which is stacked on a Y.sub.2 BaCuO.sub.5 plate, to produce a liquid phase, BaCu.sub.2.CuO which flows down into the Y.sub.2 BaCuO.sub.5 plate, a peritectic reaction of the Y.sub.2 BaCuO.sub.5 of the plate, with the liquid phase, BaCuO.sub.2.CuO, to form a YBa.sub.2 Cu.sub.3 O.sub.y phase, and cooling and annealing the resulting YBa.sub.2 Cu.sub.3 O.sub.y to gain superconducting properties, in which weak-links are reduced by the well oriented-grains with few voids, and the grains of the fine grained Y.sub.2 BaCuO.sub.5 phase act as flux pinning centers, which increases the critical current density.

REFERENCES:
patent: 4956336 (1990-09-01), Salama et al.
patent: 4994437 (1991-02-01), Yorii et al.

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