Wire Patents (Class 505/821)
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Patent number: 7505800Abstract: A superconductive element containing Nb3Sn, in particular a multifilament wire, comprising at least one superconductive filament (8) which is obtained by a solid state diffusion reaction from a preliminary filament structure (1), said preliminary filament structure (1) containing an elongated hollow pipe (2) having an inner surface (3) and an outer surface (4), wherein said hollow pipe (2) consists of Nb or an Nb alloy, in particular NbTa, wherein the outer surface (4) is in close contact with a surrounding bronze matrix (5) containing Cu and Sn, and wherein the inner surface (3) is in close contact with an inner bronze matrix (5) also containing Cu and Sn, is characterized in that the inner bronze matrix (5) of the preliminary filament structure (1) encloses in its central region an elongated core (6) consisting of a metallic material, said metallic material having at room temperature (=RT) a thermal expansion coefficient ?core<17*10?6K?1, preferably ?core?8*10?6 K?1, said metallic material having at RT aType: GrantFiled: April 11, 2006Date of Patent: March 17, 2009Assignee: Bruker BioSpin AGInventors: René Flükiger, Vital Abächerli, Davide Uglietti, Daniel Eckert
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Publication number: 20020023772Abstract: A superconducting wire having a fine line made of an oxide superconductor which has metal material dispersed therein, the outer periphery of which being coated with a conductive material; and a manufacturing method for the superconducting wire, comprising a process for drawing a metal pipe; filled with an oxide superconductor so as to product the fine line and a process for heating the fine line at a temperature which is higher than the melting point of the metal material constituting the metal pipe.Type: ApplicationFiled: September 14, 1995Publication date: February 28, 2002Inventor: NORIO KANEKO
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Patent number: 6235685Abstract: A rod 1 made of superconducting oxide is soaked in a molten normal conductor 2 to join the rod 1 and the normal conductor 2, whereby a superconducting oxide current lead is prepared. As a result, a contact resistance at the interface between the superconducting oxide and the normal conductor can be reduced. Consequently, Joule's heat at a current lead having a small cross sectional area can be suppressed low, which in turn realizes the reduction of the load on a freezer and the amount of evaporated cooling solvent, with respect to a superconducting coil.Type: GrantFiled: November 15, 1999Date of Patent: May 22, 2001Assignee: International Superconductivity Technology CenterInventors: Junya Maeda, Teruo Izumi, Yuichi Imagawa, Satoshi Matsuoka, Yuh Shiohara, Shoji Tanaka, Hiroshi Okamoto
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Patent number: 5926942Abstract: A compound superconducting wire comprising a matrix of CuX alloy and a multiplicity of Z.sub.3 X filaments embedded in the matrix in a spaced relationship so as not to come into contact with each other wherein X is Sn or Ga and Z.sub.3 X is Nb.sub.3 Sn or V.sub.3 Ga. In a precursor, therefore, a multiplicity of filaments of a base metal material Z such as Nb are arranged in a Cu base metal matrix concentrically in layers around a center core of a base metal material X such as Sn, in which the spacing between any adjacent filaments arranged in a former boundary region of an .epsilon.-phase bronze layer having a certain radius from the center produced when the precursor is preheat-treated at a temperature of 300.degree. to 600.degree. C. is made larger than the spacing between any adjacent filaments arranged in the other matrix regions.Type: GrantFiled: April 4, 1997Date of Patent: July 27, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yoshio Kubo, Kunihiko Egawa, Hiroko Higuma, Takayuki Nagai, Fusaoki Uchikawa
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Patent number: 5866195Abstract: A method for producing elongated strip, wire or cable, a portion or all of which is defined by electrically metallic superconducting material. In one form, a substrate in the form of a strip, wire or cable, is formed by extrusion, rolling, drawing, casting or a combination of two or more of such processes, of a metal, combination of metals, metal compound, non-metallic material or a combination of such materials, and is controllably driven through a reaction chamber while the material thereof, or of the surface stratum thereof, is chemically converted, as it is driven, to a superconducting material. In a second form, such elongated wire, strip or cable is controllably coated with one or more materials which define a superconducting layer thereon or a plurality of such superconducting layers which bond or solidify on the substrate.Type: GrantFiled: May 8, 1995Date of Patent: February 2, 1999Inventor: Jerome H. Lemelson
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Patent number: 5545613Abstract: A method of preparing a superconducting oxide by combining the metallic elements of the oxide to form an alloy, followed by oxidation of the alloy to form the oxide. Superconducting oxide-metal composites are prepared in which a noble metal phase intimately mixed with the oxide phase results in improved mechanical properties. The superconducting oxides and oxide-metal composites are provided in a variety of useful forms.Type: GrantFiled: July 11, 1994Date of Patent: August 13, 1996Assignee: Massachusetts Institute of TechnologyInventors: Gregory J. Yurek, John B. VanderSande
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Patent number: 5525585Abstract: The present invention provides a process for the preparation of YBa.sub.2 Cu.sub.3 O.sub.7-x superconductor which comprises surrounding a sintered material in which the molar ratio of Y:Ba:Cu is 2:1:1 with liquid-forming powder and subjecting the powder compact to isothermal heat-treatment at a temperature below the peritectic temperature of YBa.sub.2 Cu.sub.3 O.sub.7-x. The YBa.sub.2 Cu.sub.3 O.sub.7-x superconductors prepared according to the present invention have aligned grain structure in one direction and thus exhibit a high critical current density.Type: GrantFiled: June 16, 1994Date of Patent: June 11, 1996Assignee: Korea Advanced Institute of Science and TechnologyInventors: Jeong-Hun Suh, Young A. Jee, Suk-Joong L. Kang, Duk Y. Yoon
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Patent number: 5472936Abstract: A method for making triniobium tin foil is disclosed where the niobium-based foil with an oxide layer is passed continuously at a set speed into an enclosed chamber. The enclosed chamber has an inert atmosphere which is substantially oxygen free. Upon entering the chamber, the foil passes through a decomposition anneal furnace, a low temperature tin dip, and then a high temperature reaction anneal furnace before exiting the chamber as triniobium tin foil.Type: GrantFiled: July 5, 1994Date of Patent: December 5, 1995Assignee: General Electric CompanyInventors: Mark G. Benz, Neil A. Johnson, Melissa L. Murray, Robert J. Zabala, Louis E. Hibbs, Jr., Bruce A. Knudsen
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Patent number: 5419974Abstract: A component 10 for making Al5 Nb.sub.3 Sn superconducting wire is of plane-filling cross-section after removing temporary additions 6, 7. It consists of a central pillar 1 of aluminium (later replaced by tin) surrounded by a two-deep array of polygonal copper columns 2/2a containing niobium rods. Many (e.g. 61) components 10 are stacked together and extruded. The niobium rods adopt and retain a uniform distribution with minimum intervening material. On heat-treatment of the whole, the tin diffuses over a relatively short path and hence consistently into the rods, whereby there is formed a kilofilament Nb.sub.3 Sn wire.Type: GrantFiled: January 5, 1993Date of Patent: May 30, 1995Assignee: British Technology Group Ltd.Inventors: Colin R. Walters, Jan E. Evetts, Francis J. V. Farmer, Thomas J. Hawksley
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Patent number: 5376625Abstract: A thin film superconductor assembly is disclosed along with a method of fabricating same. The assembly comprises a self-supporting substrate defining at least a portion of a containment for a flow of cryogenic fluid, a dielectric layer adherent to a surface of the substrate, a thin film superconductor adherent to the dielectric layer and a moisture and oxygen impervious electrically insulating coating covering the thin film superconductor. A method of forming such thin film superconductor assembly, wherein the dielectric layer consists essentially of aluminum nitride, comprises growing the aluminum nitride dielectric layer integrally on the surface of the substrate.Type: GrantFiled: February 20, 1992Date of Patent: December 27, 1994Assignee: Ford Motor CompanyInventor: Robert C. McCune
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Patent number: 5196399Abstract: A device for fabricating an oxide superconductor cable includes a spinning furnace for receiving a preform and spinning the preform into a glass fiber. The device further includes a sputtering apparatus for receiving the spun glass fiber and coating the glass fiber with an oxide superconductor film as well as a pulling mechanism for pulling the glass fiber.Type: GrantFiled: August 6, 1991Date of Patent: March 23, 1993Assignee: Fujikura Ltd.Inventors: Takao Shiota, Hiroshi Hidaka, Koichi Takahashi, Masahiro Sato, Osamu Fukuda, Koichi Inada
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Patent number: 5164361Abstract: A method for making superconducting ceramic filaments by joining the ceramic to a normal conducting metal in such a way that minimal mechanical working, drawing, or extrusion is needed to arrive at a fine filamentary shape.Type: GrantFiled: June 29, 1989Date of Patent: November 17, 1992Assignee: The United States of America as represented by the Secretary of the NavyInventors: Louis F. Aprigliano, Richard J. Stockhausen
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Patent number: 5118663Abstract: A method and apparatus for manufacturing a superconductor wire has a wire take-up spool and a feed speed control spool. A wire substrate is taken from the feed speed control spool and onto the take-up spool as the wire take-up spool is rotated. The wire passes through a container which holds a diffusion barrier material, where the diffusion barrier material is electrophoretically deposited onto the wire substrate and subsequently sintered. The wire is also passed through a container which holds a superconductor material suspended in solution, and a layer of the superconductor material is electrophoretically deposited onto the diffusion barrier. The grains of the superconductor layer are then magnetically aligned and sintered. Also, a silver coating is electrophoretically deposited onto the superconductor layer and sintered. A diffusion bonding inhibitor material is then applied to the silver coating. Then, the silver-coated superconductor wire is spooled and heated to four hundred degrees centigrade (400.Type: GrantFiled: September 21, 1990Date of Patent: June 2, 1992Assignee: General AtomicsInventors: Lawrence D. Woolf, Michael V. Fisher, William A. Raggio, Frederick H. Elsner
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Patent number: 5047386Abstract: An apparatus for the continuous manufacture of high temperature superconducting wires is disclosed. A core on which the superconductive ceramic substance is caused to directionally solidify from the melt is drawn through the melt in such a manner as to obtain an oriented microstructure conductive to high critical current carrying capacity. This also produces a macrostructure with appropriate mechanical strength and flexibility independently of the superconducting substance chosen.Type: GrantFiled: December 29, 1988Date of Patent: September 10, 1991Assignee: Troy Investments Inc.Inventor: Aharon Z. Hed
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Patent number: 5021401Abstract: This is a process for fabrication of nickel-oxide insulation on a superconductor. The process utilizes; reacting oxygen-free nickel powder with oxygen-free carbon monoxide generally at 50.degree.-75.degree. C. to produce a nickel carbonyl, separating the nickel carbonyl from reaction by-products and excess reagents by cooling the carbonyl and decanting the nickel carbonyl liquor, and contacting the carbonyl to a surface of a wire containing superconductor or superconductor precursors in an atmosphere containing a controlled amount of oxygen, with the wire at 50.degree.-800.degree. C. to produce nickel suboxide insulation on the wire. The purified nickel carbonyl and oxygen may be alternately (rather than simultaneously) introduced, to deposit a series of metallic nickel films on the wire, each of which metallic films are then oxidized to a nickel suboxide.Type: GrantFiled: April 3, 1989Date of Patent: June 4, 1991Assignee: Westinghouse Electric Corp.Inventors: Thomas S. Snyder, Richard A. Stoltz, George R. Wagner
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Patent number: 4914081Abstract: Processes are described for electroplating metal or alloy on superconducting oxides using either a nonaqueous bath or aqueous bath with suitably applied potential. Articles made in accordance with the electroplating process are also described.Type: GrantFiled: January 15, 1988Date of Patent: April 3, 1990Assignee: American Telephone and Telegraph Company, AT&T Bell LaboratoriesInventors: Barry Miller, Joseph M. Rosamilia
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Patent number: 4879270Abstract: The invention relates to an improvement in a method of forming deposits of superconducting ceramics. Generally, such ceramics are formed by electrodepositing a mixture of metals of the type, and in proportions sufficient to be oxidized into ceramic, onto a substrate. The electrodeposited mixture is then oxidized under conditions sufficient to result in a super conducting ceramic deposit. The improvement resides in conducting the electrodeposition in a manner which results in a patterned electrodeposition prior to conducting oxidation.Type: GrantFiled: April 29, 1988Date of Patent: November 7, 1989Assignee: Allied-Signal Inc.Inventors: MacRae Maxfield, Ray H. Baughman, Zafar Igbal, Helmut Eckhardt