Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconducting wire – tape – cable – or fiber – per se
Patent
1995-06-29
1997-07-15
Lieberman, Paul
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Superconducting wire, tape, cable, or fiber, per se
505126, 505430, 505729, 505785, 252521, H01L 3912, C04B 35505
Patent
active
056483198
ABSTRACT:
Disclosed is an oxide superconductor comprising an oxide of RE, Ba and Cu, which consists of a superconductor having a texture wherein the crystal directions of the 123 phase in the matrix are uniform, large angle grain boundaries having an directional difference larger than 20.degree. are not present and the 211 phase is finely dispersed, or an aggregate thereof, wherein the superconductor is formed into a plate or wire and the c-axis of the crystal of the formed body is uniform within .+-.30.degree. to the normal of the plate face of the formed body or in the range of from 60.degree. to 120.degree. to said normal. Also disclosed is a process for the preparation of an oxide superconductor as set forth above, which comprises inserting a formed body as mentioned above to a heating furnace and moving a region of a temperature at which grains are formed in the 123 phase of the matrix of the formed body, i.e., through a region having a temperature of from 1050.degree. to 910.degree. C., having a temperature gradient of at least 2.degree. C./cm, at a speed lower than 0.4 cm/hr from the top end of the formed body to the rear and thereof.
REFERENCES:
patent: 4952390 (1990-08-01), Takei
patent: 4956336 (1990-09-01), Salama
patent: 4962085 (1990-10-01), deBarbadillo
patent: 4975416 (1990-12-01), Onishi
patent: 5017548 (1991-05-01), Kirakawa
patent: 5037801 (1991-08-01), Kloucek
patent: 5045526 (1991-09-01), Nagesh
patent: 5084436 (1992-01-01), Morimoto
patent: 5179073 (1993-01-01), Yamazaki
patent: 5356869 (1994-10-01), Capone et al.
Hemley et al "Single-Crystal Micro-Raman Spectroscopy of Phases in the Y-Ba-Cu-O . . . " Phys. Rev. Lett., vol. 58, No. 22, 1 Jun. 1987, pp. 2340-2342.
Damento et al "Preparation of Single Crystals of Superconducting YBa.sub.2 Cu.sub.3 O.sub.7-x . . . " Appl. Phys. Lett. vol. 51, No. 9, 31 Aug. 1987, pp. 690-691.
Graebner et al "Thermal Conductivity of Single-Crystal & Sintered RBa.sub.2 Cu.sub.3 O.sub.7 . . . " Mat. Res. Soc. Symp. Proc. vol. 99, Dec. 1987 pp. 745-748.
Jin "Large Magnetic hysteresis in a melt-textured Y-Bu-Cu-O Super . . . " Appl. Phys. Lett. v.54(6) Feb. 6, 1989 pp. 584-587.
Murakami "A new process with the promise of high Jc . . . " Jap Jul Appl. Phys. v.78(7) Part I Jul. 1989 pp. 1189-1191.
Lu et al "A Study of YBa.sub.2 Cu.sub.3 O.sub.9-8 Type Superconducting Single Crystals" Internatn'l Journal of Modern Physics, vol. 1, No. 2, 1982 pp. 327-330.
Y. Yamada, et al., "Critical Current Density of Wire Type Y-Ba-Cu Oxide Superconductor", J.J. of Applied Physics, vol. 26, No. 5, May 1987, pp. L865-L866.
D. Dimos, et al., "Orientation Dependence of Grain-Goundary Critical Currents in YBa.sub.2 Cu.sub.3 O.sub.7 -8 " , Physical Review Letters, vol. 61, No. 2, Jul. 1988, pp. 219-222.
Matsuda Shouichi
Miyamoto Katsuyoshi
Morita Mitsuru
Sawano Kiyoshi
Kopec M.
Lieberman Paul
Nippon Steel Corporation
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