Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1989-10-13
1991-08-06
Lowe, James
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
264 63, 26421111, 26421112, 505740, H01L 3912
Patent
active
050378015
ABSTRACT:
Production of a wire-shaped ceramic high-temperature superconductor based on (Y,SE)Ba.sub.2 Cu.sub.3 O.sub.6.5+y with SE=rare earth metal and 0<y<1, in which 80 to 95% by weight of an ultra-fine grained powder (1) of globulitic particles having a maximum diameter of 1 .mu.m are processed with 0.5 to 3% by weight of a powder (3) of needle- and plate-shaped particles having a length of 10 to 50 .mu.m and 4 to 20% by weight of an organic binder with solvent (5) to form a highly viscous slip (7) and is extruded to form a strand (10) having longitudinally oriented needle- and plate-shaped particles and this is dried in air, calcined and sintered to form a fiber (13).
REFERENCES:
Journal of Materials Science Letters, vol. 7, No. 3, Mar. 1988, (London, GB), pp. 283-284, T. Goto, et al., "Wet Spinning of a Single Layered Perovskite Y-Ba-Cu-O Superconductors".
Solid State Communications, vol. 66, No. 7, Apr. 1988, Pergamon Press plc (GB), pp. 735-738, P. Murugaraj, et al., "Preparation of Highly Oriented Polycrystalline YBa.sub.2-y Cu.sub.3 O.sub.x Superconductors".
J. Am. Ceram. Soc. 70, Dec. 1987, C-388-C-390, I-Wei Chen, et al., "Texture Development in YBa.sub.2 Cu.sub.3 O.sub.x by Hot Extrusion and Hot-Pressing".
Japanese Journal of Applied Physics, vol. 26, No. 7, Jul. 1987, pp. L1197-L1198, S. Hayashi, et al., "Growth of YBa.sub.2 Cu.sub.3 O.sub.9-8 Single Crystals from the High Temperature Solution".
Appl. Phys. Letters 51, 1987, 1040-1042, D. L. Kaiser, et al., "Growth of YBa.sub.2 Cu.sub.3 O.sub.x Single Crystals".
J. Phys. E:Sci. Instrum. 20, 1987, 1292-1293, S. Vieira, et al., "A Simple Device for Quick Separation of High-Tc Superconducting Materials".
Trans. Brit. Ceram. Soc. 55, 1956, 57-74, A. L. Stuijts, "Sintering of Ceramic Permanent Magnetic Material".
Asea Brown Boveri Ltd.
Fiorilla Christopher A.
Lowe James
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