Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1988-07-18
1991-07-16
Lieberman, Paul
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
252521, 423593, 423604, 423635, 501 94, 501123, 501126, 505725, C01B 1300, C01F 1700, C01G 302, C04B 3500
Patent
active
050325701
ABSTRACT:
This invention provides a method for producing an oxide superconductor which has a uniform texture and is markedly high in sintered density and current density.
The method involves the formation of intermediate products from the starting materials. The intermediate products are then used to form the final product. Specifically, to form an oxide superconducting material having a compositional formula
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K. Matsuzaki et al., "Preparation of a High Tc Superconductor by Oxidization of an Amorphous La.sub.1.8 Sr.sub.0.2 Cu Alloy Ribbon in Air", Jpn. J. Appl. Phys., vol. 26, No. 4, Apr. 1987, pp. L334-L336.
S. J. Hwu et al., "Subsolidus Compatibilities in the Y.sub.2 O.sub.3 -BaO-CuO System via Diamagnetic Susceptibility", J. Am. Ceram. Soc., vol. 70, No. 7, Jul. 1987, pp. C-165-C-167.
H. Takei et al., "Growth of YBa.sub.2 Cu.sub.3 O.sub.x Single Crystals with Superconducting Transition Above 90 K", Jpn. J. Appl. Phys., vol. 26, No. 9, Sep. 1987, pp. L1425-L1427.
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Cara et al, "Bulk Syperconductivity at 91K in Single-Phase Oxygen-Deficient Perovskite Ba.sub.2 YCu.sub.3 O.sub.9-8 ", Physical Review Lett., vol. 58, No. 16, 4/20/87, pp. 1676-1679.
Iimura Tsutomu
Iyori Yusuke
Kasakoshi Toshiyuki
Maruta Kenzi
Ogata Yasunobu
Boyd John
Hitachi Metals Ltd.
Lieberman Paul
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