Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – With melting
Patent
1994-06-23
1996-04-16
Lieberman, Paul
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
With melting
505100, 505124, 505729, 505740, 505776, 505780, 505782, 505737, 505452, 252518, 252521, 423593, H01B 1200, H01L 3912
Patent
active
055082564
ABSTRACT:
A method of producing a high-temperature oxide superconducting material, which comprises the steps of (a) preparing a material corresponding to an oxide superconductor of the perovskite type structure consisting essentially of a first member selected from the group consisting yttrium, lanthanoids, thallium and bismuth; at least one alkaline earth metal; copper; and oxygen and (b) heating the material in the presence of an alkali metal selected from the group consisting of potassium, sodium, rubidium and cesium to a temperature around the melting point of the alkali metal or to a higher temperature for a time sufficient to effect grain growth in the superconductor material, thereby to produce the superconductor containing the alkali metal in an amount not larger than 4 mole % based on the first member.
REFERENCES:
patent: 3772090 (1973-11-01), Allen et al.
patent: 4921834 (1990-05-01), Hasegawa
patent: 5039653 (1991-08-01), Jackson et al.
Advanced Ceramic Materials-Ceramic Superconductors, vol. 2, No. 3B, Jul., 1987, pp. 457-470, ACerS, Westerville, OH, US I. W. Chen, et al "Superconductivity and the tailoring of lattice parameters of the compound . . . ".
Japanese Journal of Applied Physics/Part 2, Letters, vol. 27, No. 2, Feb., 1988, pp. L185-L187.
M. Okada, et al "Fabrication of Ag-sheathed Ba-Y-Cu oxide superconductor tape" Feb. 1988.
Advanced Ceramic Materials-Ceramic Superconductors, vol. 2, No. 3B, Jul. 1987, pp. 388-400, ACerS, Westerville, OH, US, R. W. McCallum, et al "Problems in the production of YBa2CU30x superconducting wire".
Z. Phys. B Condensed Matter 64, 189-193 (1986) No Month Available.
Physical Review Letters, vol. 58, No. 9, Mar. 1987, pp. 908-910.
Japanese Journal of Applied Physics, vol. 26, No. 4, Apr. 1987, pp. L 314-L 315.
Journal of the Japan Metal Society, vol. 26, No. 10, 1987, p. 971 No Month Available.
Japanese Patent No. 57-118002 Jul. 1982 Kokai (Laid Open).
Japanese Journal of Applied Physcis, vol. 26, 1987, p. L. 10/1645.
Saito et al., "High Tc Superconducting Properties in YTlBaCuO, YBaKCuO and YBaCuMgO", Physica 148B, 1987, pp. 336-338.
Okada "Fabrication of Ag-Sheathed Ba-Y-Cu Oxide Superconductor . . . " Jpn. Jnl. Appl. Phys. Lett. vol. 27(2) Feb., 1988 pp. L185-L187.
Jin "High Tc superconductors--composite wire fabrication" Appl. Phys. Lett. vol. 51(3) Jul. 20, 1987 pp. 203-204.
Jin "Processing for high-critical currents in YBa.sub.2 Cu.sub.3 O" MRS: Extended Abstracts: Superconduct. III Apr. 5-9, 1988 pp. 153-156.
Jin "Melt textured growth of polycrystalline YBa.sub.2 Cu.sub.3 O.sub.2 . . . " Phys. Rev. B vol. 37(13) May 1, 1988 pp. 7850-7853.
Franck "Superconductivity in Systems of composition . . ." Rev. of Solid State Sci vol. 1 (2) 1987 pp. 405-410.
Suzuki "Superconducting transition temperature in the (YBa.sub.2 Cu.sub.3 O.sub.7-.delta.) . . . " J. Material Sci Lett. vol. 7(9) 1988 pp. 926-927.
Strobel "Superconducting Properties of Sunbstituted Yba.sub.2 Cu.sub.3-.delta. M.sub.3x O.sub.7 " Solid State Comm. v. 65(7) 1988 (Feb.) pp. 585-589.
Yuhuan "High-Tc Superconductivity and Structure of . . . " Int. Jnl. Med. Phys. vol. 1 No. 2 1987 pp. 253-256.
Jiang "Crystal Growth of Y-Ba-Cu-O compound by laser . . . " Ext. Abstracts: High Temp Super. II MRS) Apr. 5-9, 1988, pp. 125-128.
Kilcoyne "Improving inter-grain contact in high-Tc Superconducting . . . " J. of Physics D Oct. 14, 1987 pp. 1327-1329.
Varadavaju "Effect of Chemical Substitution on the . . . Yba.sub.2 Cu.sub.3 O.sub.7 " Physica 148B 1987 pp. 417-418.
Jung "Effect of Substitution of Bi, Ga, and Fe on . . . YBa.sub.2 Cu.sub.3 O.sub.7 " Phys. Rev. B vol. 37(13) May 1, 1988 pp. 7510-7515.
Ausloos "Effects of Alkali Cation (Li, Na, K, Cs) . . . of YBa.sub.2 Cu.sub.3 O.sub.7 . . . " Solid State Comm. v. 68(6) 1988 pp. 539-545.
Higashiyama Kazutoshi
Kamo Tomoichi
Kanai Tsuneyuki
Kodama Hideyo
Kumagai Teruo
Hitachi , Ltd.
Kopec M.
Lieberman Paul
LandOfFree
Oxide high-temperature superconducting material, method of prepa does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oxide high-temperature superconducting material, method of prepa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxide high-temperature superconducting material, method of prepa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-325151