Abstract: The present invention is related to a superconductive ceramic wire and a method for making same.According to the first aspect of the invention, there is provided a method for making a superconductive ceramic wire, the method comprising the steps of: (a) preparing a superconductive porous ceramics; (b) depositing lead in the pores of the ceramics; (c) covering the lead-deposited ceramics with a metal; and (d) extending the metal-clad and lead-deposited ceramics.According to the second aspect of the invention, there is provided a superconductive ceramic wire which is obtained by: (a) preparing a superconductive porous ceramics; (b) depositing lead in the pores of the ceramics; (c) covering the lead-deposited ceramics with a metal; and (d) extending the metal-clad lead-deposited ceramics.

Abstract: An integrated circuit having a superconductive wiring comprises a semiconductor substrate, an integrated circuit device formed on the semiconductor substrate and a wiring connected to the integrated circuit device. The wiring is formed of a superconductive material and has a wide portion for heat radiation. The manufacturing method of the same comprises the steps of preparing a semiconductor substrate, forming an integrated circuit device on the semiconductor substrate, and connecting a wiring having a wide portion for heat radiation and formed of a superconductive material to the integrated circuit device on the semiconductor substrate.

Abstract: A superconducting structural body comprising an oxide based superconducting ceramics powder having a perovskite structure and a metal sheath surrounding the oxide based superconducting ceramics powder, the metal sheath including an Ag portion and a non-Ag metal portion, the Ag portion existing from the inner to outer surfaces of the metal sheath, a superconducting ceramics powder portion existing in the structural body, the non-Ag metal protion used as a structural material of the metal sheath of an outermost layer of the structural body, the superconducting ceramics powder portion and the non-Ag metal portion being disposed so as to be indirectly contact each other through the Ag material, and the superconducting structural body having a compressed oriented layer in which the C-axis of the crystal in the superconducting ceramics powder is oriented in the direction perpendicular to the longitudinal direction of the superconducting structural body, and in which a thickness thereof is not smaller than 5 .mu.

Abstract: A multifilamentary superconducting cable has two parallel spaced-apart guide wires. A first layer of mutually parallel superconducting filaments is woven partially around and between the guide wires in a transposed braid. Likewise, a second layer of mutually parallel superconducting filaments is woven partially around and between the guide wires in a transposed braid. Thus, the two layers overlap each other as the respective layers pass between the guide wires. The two superconducting layers and two guide wires are enclosed in a helical copper duct, with the guide wires being oriented within the duct.

Abstract: A superconductive wire having an elongated flexible sheath bent into a nonlinear shape and formed with an inwardly extending longitudinal formations which can be grooves. A sintered body of a ceramic superconductive materials fills the sheath and conforms to the shape, the body having formations complementarily interfitting with the formations of the sheath. At least one of the grooves can be formed with a channel through which a cooling medium can be circulated or the grooves can receive a conductive strand or a support rod.

Abstract: A glass-clad wire of ceramic superconductive material is produced by filling a glass-lined metal cylinder with a powder of superconductive material, sealing the cylinder ends and drawing the filled, sealed cylinder through dies of progressively smaller size until a predetermined wire size is achieved. The formed wire is then heat treated to assure necessary crystallinity in the superconductor material. Removal of the outer metal coating leaves a glass-clad superconductor wire.

Abstract: The present invention identifies several configurations of conducting elements capable of storing extremely high magnetic fields for the purpose of energy storage or for other uses, wherein forces experienced by the conducting elements and the magnetic field pollution produced at locations away from the configuration are both significantly reduced over those which are present as a result of the generation of such high fields by currently proposed techniques. It is anticipated that the use of superconducting materials will both permit the attainment of such high fields and further permit such fields to be generated with vastly improved efficiency.

Abstract: Electrical conductor comprising a glass fibre (12) with a hollow center within which is a liquid solution (14) containing D.sup.+ or other boson ions. Coherent light from a laser (15) is directed into the solution to render the boson ions coherent, inducing a superconducting state. In another embodiment, the laser is replaced by a microwave source.

Abstract: An electric cable for shielding the conductor therein from tensile stresses during bending of the conductor in a predetermined lateral direction. An elongated duct having a pair of opposed sidewalls and a floor therebetween holds the conductive element, while an elongated lid of relatively substantial thickness is mounted in the opening to the duct between the free ends of the sidewalls. The lid fills the duct from the opening between the free ends of the sidewalls to the neutral surface produced by lateral bending of the cable in the direction of the floor of the duct. Bonding material secures the lid and duct in a fixed longitudinal relationship, and a suitable flowable filler encases the conductor in the resulting tubular housing. The cable disclosed has particular application to the preservation of the integrity of superconductor materials used as the conductor in the cable. Preferably, the duct and lid are made of soft and hard copper, respectively.

Abstract: A coating composition for ceramic fibers is provided which includes metal particles and a vehicle. The coating can be applied to a green ceramic or a sintered ceramic, and is co-sintered or sintered therewith. Such coatings are useful for coating high temperature superconducting ceramic fibers and can be co-sintered therewith. The coated superconducting fibers, in which case the coating is porous to allow for annealing to adjust the oxygen stoichiometry, can then be sandwiched between metal cladding layers to provide a multifilamentary electrical conductor including superconducting active components. The coating is useful for such conductors because it compatibilizes the ceramic fiber with metal components, such as a solder, as well as protecting the ceramic from possibly degrading reactions. The compositions are also generally advantageous in compatibilizing ceramic fibers with a metal matrix.

Abstract: Electrical conductor in wire or cable form composed of a sheathed wire or of a multiple-filament conductor based on a ceramic high-temperature superconductor of the REBa.sub.2 Cu.sub.3 O.sub.6.5+y type, RE being=rare-earth metal, O<y<1, or of the (La,Ba,Sr).sub.2 CuO.sub.4 type, as core (1) and of a metal sheath (3) as mechanical support and emergency current conductor, the core (1), clad with metal sheath (3), of each filament of the electrical conductor composed of a multiplicity of filaments being embedded on all sides in a soft magnetic material (4) of high permeability.

Abstract: A wire of ceramic superconductive material is produced by filling a metal tube with a powder of superconductive material, sealing the tube ends and drawing the filled, sealed tube through dies of progressively smaller size until a predetermined wire size is achieved and then heat treating the drawn wire to assure necessary crystallinity in the superconductor material.

Abstract: A ceramic wire superconducting cable is provided having porous expanded polytetrafluoroethylene insulation, a superconductive ceramic tape "conducting" layer having openings at prescribed intervals and a high strength polytetrafluoroethylene fiber protective layer. The components covering the cable are porous permitting liquid nitrogen to permeate and directly contact with the superconductive cable.

Abstract: A superconducting strand comprises a central superconducting filament (1), a covering (2) of oxide for ensuring sufficient oxygen pressure around the filament (1), a layer of cladding (3) made of aluminum, an alloy of copper and aluminum, or of stainless steel, a layer of cladding (4) made of niobium, of tantalum, or of vanadium, and an outer covering of copper (5).

Abstract: A composite hyperconductor for use at cryogenic temperatures and particularly well suited for AC applications employs at least one filament of conductor having an extremely low electrical resistance at cryogenic temperatures, a strengthening matrix surrounding the conductor, and a barrier for electrically insulating the conductor from the matrix while providing for efficient heat transfer therebetween and/or serving as a diffusion barrier to prevent contamination of the high purity conductor during processing. The preferred composite hyperconductor for space applications comprises an ultra high purity aluminum conducting filament, a aluminum alloy matrix and a boron nitride barrier.

Abstract: A composite superconducting wire using ceramic superconductor material in which one or more elongated superconductor material are accomodated in one or more grooves formed on an elongated reinforcing member so that a long size superconductor wire can be provided. Various methods of producing such composite superconductor wire are also disclosed.

Abstract: Superconductor wire, and methods of constructing same, including one or more filaments formed of submicron-particle superconductor powder each surrounded by an encapsulating sheath having a composite wall. The composite wall includes a ductile outer skin surrounding a relatively harder, higher yield strength inner wall portion. The harder, higher strength inner wall portion improves dimensional uniformity of the filaments as the wire is fabricated, with the potential for enhanced superconducting performance, while the ductile outer skin enhances metallurgical bonding between the outer skins of adjacent filaments, to ensure a homogenous, thermally conductive and normally electrically conductive matrix.

Abstract: An electromagnetic railgun. The device features two electrically connected arallel rails. One end of each rail may be connected to a D.C. voltage source. At least one of the rails has a hole for closely receiving a metallic projectile. When the projectile is within the hole and the voltage is applied, currents flow through the two rails. Interaction of the currents with the self generated magnetic field causes a repulsive force between the two rails and launches the projectile outward from the rails.

Abstract: A superconducting fiber of a superconducting fiber bundle includes a carrier fiber having an outer surface, and superconducting layers and separating layers alternatingly surrounding the outer surface of the carrier fiber and a method for producing the same.

Abstract: A superconducting electrical conductor comprises a porous substrate of bonded fibers which are coated by ceramic oxide superconducting material of the perovskite type so that its critical temperature of superconductivity is at or above the boiling point of liquid nitrogen. To form electrical cable, the conductor is encased within an inner tube. An outer tube surrounds the inner tube and defines an evacuated annular space therewith. This provides a thermal barrier between substrate, which will be bathed by liquid nitrogen, and the ambient. Electrical and heat insulation surrounds the outer tube.Joint connectors in the form of multiple rigid rods, each coated by superconducting material and held in a perforated frame, are used to connect facing ends of the substrate to form an electrical connection from one length of conductor to the next.

Abstract: A ceramic type superconductive layer (2) is formed on the outer peripheral surface of an optical fiber (1), and a stabilizing layer (3) is formed so that it contacts the outer peripheral surface of the superconductive layer (3). The diameter of the optical fiber is, for example, not more tha 100 .mu.m. The superconductive layer may be formed with a spirally extending groove (7) which divides the superconductive layer.

Abstract: A hybrid superconductive fiber or strand comprises at least two layers surrounding a core wherein the fiber or strand comprises two superconductive materials. One of the superconductive materials is a Chevrel phase, optionally doped, which constitutes one of the layers or the core. The other superconductive material, other than the Chevrel phase, constitutes another layer, optionally lacunar, or the core.

Abstract: A multifilament superconductor having continuous, non-random pinning centers and including a plurality of parallel superconductive subfilaments of uniform cross-sectional area, the subfilaments being embedded in generally hexagonal pinning jackets, and the pinning jackets together forming a structure having a honeycomb-like cross-section, the jackets having a wall thickness that is substantially an integral multiple of the coherence length of the subfilaments in a predetermined field, the jackets together forming a plurality of continuous paths for fluxoids across the superconductor, whereby total pinning density of said superconductor is substantially increased, and the critical field strength of the superconductor is enhanced.

Abstract: A stabilized superconducting wire comprises a multicore section having a number of filaments of superconducting compound material disposed in an alloy matrix, a stabilizing material section positioned around the multicore section, and a diffusion barrier layer disposed between the stabilizing material section and the multicore section and formed of an Fe-Cr alloy containing not less than 5 weight percent but not more than 25 weight percent Cr.

Abstract: A superconducting cable comprising an in-situ-formed type II superconductor, e.g. Nb.sub.3 Sn, in association with a stabilizing conductor both in heat transfer relationship with at least one passage adapted to carry liquified gaseous refrigerant. The conductor and said at least one passage are enclosed by a sheath comprising an alloy consisting essentially of about 49% nickel, about 4% chromium, about 3% niobium, about 1.4% titanium, about 1% aluminum, balance essentially iron.