Method of manufacturing oxide superconductor

Details Method of manufacturing oxide superconductor Method of manufacturing oxide superconductor

1994-12-21

1997-07-29

Fiorilla, Christopher A.

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

With precipitating from solution

505490, 505500, C04B 3564, H01L 3924

Patent

active

056521995

ABSTRACT:
A method of manufacturing an oxide superconductor, including the steps of mixing oxide materials of the metals contained in an oxide superconductor represented by HgBa.sub.2 Ca.sub.2 Cu.sub.3 O.sub.8+y to prepare a powder mixture of the composition noted above, molding the powder mixture to prepare a molded body of a desired shape, and applying a heat treatment to the molded body within a hermetic container at a temperature sufficient for bringing about a solid phase reaction of the oxide materials for at least 20 hours. Also provided is a method of manufacturing an oxide superconductor, including the steps of mixing at least one additive element selected from the group consisting of Pb, Bi, Tl, Au, Pt, Ag, Cd and In with oxide materials of the metals contained in a Hg-series 1223 type oxide superconductor to prepare a powder mixture, molding the powder mixture to prepare a molded body of a desired shape, and applying a heat treatment to the molded body within a hermetic container at a temperature sufficient for bringing about a solid phase reaction of the oxide materials for at least 10 hours.

REFERENCES:
Hur et al. "A Mercury-Based Superconductor with a T.sub.c of 132K" Materials Research Bulletin vol. 29, No. 9, pp. 959-964 Sep. 1994.
Physica C Superconductivity, vol. 215, 1993, E.V. Antipov et al, "The synthesis and characterization of the HgBa2Ca2Cu308+delta and HgBa2Ca3Cu4010+delta phases".
Physica C. Superconductivity, vol. 216, 1993, A. Tokiwa-Yamamoto et al, "Composition crystal, structure and superconducting properties of Hg-Ba-Cu-O and Hg-Ba-Ca-Cu-O superconductors".
Physica C Superconductivity, vol. 217, 1993, K. Isawa et al, "The effect of Pb doping in HgBa2Ca2Cu308+ delta superconductor".
Modern Physics Letters B, vol. 7, No. 28, Dec. 10, 1993, Y.Y. Xue et al "Pb-Doping Effects in Hg1-xPbxBa2Ca2Cu308+ delta".
Schilling; "Superconductivity Above 130K in the Hg-Ba-Ca-Cu-O System"; May 6, 1993; pp. 56-58; Letters To Nature.
Hirabayashi; "High-Pressure Synthesis of HgBa.sub.2Ca2 Cu.sub.3 O.sub.g -.sub.x Superconductor with T.sub.c > 130K"; Sep. 1, 1993; pp. 1206-1207; Jpn. J. Apply. Phys. vol. 32, Part 2.

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