High-TC oxide superconductor and method for producing the same

Details High-TC oxide superconductor and method for producing the same High-TC oxide superconductor and method for producing the same

1989-02-23

1992-09-08

Dixon, Jr., William R.

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505782, 252518, 252500, H01B 1206, H01L 3902, H01L 3912

Patent

active

051458314

ABSTRACT:
A high-Tc oxide superconductor including Bi, Sr, Ca, Cu, O and at least one of Pb and Al, with a high critical temperature than that of liquid nitrogen. A method for producing the high-Tc oxide superconductor is also disclosed, in which Bi.sub.2 O.sub.3, SrCO.sub.3, CaCO.sub.3, CuO and PbO or Al.sub.2 O.sub.3 powders are mixed, calcined, ground, cold-pressed and sintered. The calcined mixture may be melted and annealed to obtain a tape-form superconductor.

REFERENCES:
patent: 4880771 (1989-11-01), Cava et al.
Mizuno et al., Superconductivity of Bi.sub.2 Si.sub.2 Co.sub.2 Pb.sub.2 O.sub.y (XeD,2,0,4,0,6), Jpn. J. Appl. Phys. vol. 27 #6 (Jun. 1988) 1225-27.
Komatsu et al., High-Tc Superconducting Glass Ceramics Based on the Bi-Ca-Si-Cu-O System, Jpn. J. Appl. Phys. vol. 27 #4, 550-52 (Apr. 1988).
Politis et al., "Is the Magnetic Suspension of High-Temperature Superconductor a General Phenonomen!", Mod. Phy. Lett B, 2(90), 1119-23, 1988.
Chu et al., "Superconductivity up to 114K in the Bi-Al-Ca-Su-Cu-O Compound System without Rare-Earth Elements", Phy. Rev. Lett. vol. 60 #10, 7 Mar. 1988, pp. 941-943.
Komatsuo, "High Tc Superconducting Glass Ceramic Based on the Bi-Ca-Si-Cu-O System".
Maeda et al., "A New High-Tc Oxide Superconductor Without a Rare Earth Element", Japanese Journal of Applied Physics, vol. 27, Feb. 1988, pp. L209-L210.
N. Brnicevic, et al., "High-T.sub.c Phase Stabilization In Bi-Ca-Sr-Cu-O Systems by Lead Doping", Journal of the Less-Common Metals, vol. 150, 1989, pp. 261-267.
C. Michel, et al., "Superconductivity in the Bi-Sr-Cu-O System", Condensed Matter, vol. 68, 1987, 421-423.
A. M. Hermann et al., "Melt-processible Rare Earth-Ba-Cu-O Superconductors Based on Molten Ba-Cu oxides", Applied Physics Letters, vol. 51, 1987, Nov., No. 22, pp. 1854-1856.

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