Siemens Aktiengesellschaft

Kernforschungszentrum Karlsruhe Gmbh

Forschungszentrum Karlsruhe Gmbh

Karlsruher Institut Fur Technologie

Wilfried Goldacker

Marijn Pieter Oomen

Steffen Elschner

Rene Flukiger

Jacob Johan Rabbers

Andrej Kudymow

Sonja Schlachter

Joerg Brand

Stefan Fink

Antje Drechsler

Jörg Brand

An insulated high-temperature wire superconductor includes a wire of a non-insulated high-temperature wire superconductor, the width of which is at least 10 times its thickness and in which a high-temperature superconductor is introduced into a matrix or is applied to a substrate. The wire is provided with an electrically non-conducting insulating layer on both sides such that the two insulating layers have an insulating edge width in a range from 2 mm to 200 mm which projects in relation to the wire.

Insulated high-temperature wire superconductor and method for producing same

A process produces a connecting structure between two superconductors, in particular magnesium diboride superconductors embodied as a superconducting core wire surrounded by normally conducting metal. A substance which reduces the melting point of magnesium is admixed to a substance mixture including magnesium and boron, and the exposed ends of the core wires are brought into contact with the substance mixture, which is caused to react in situ at a reaction temperature corresponding to the lower melting point to give magnesium diboride.

Process for producing a connecting structure between two superconductors and structure for connecting two superconductors

In a multi-core-BSCCO high-temperature superconductor comprising a superconductor structure disposed in a silver enclosure, silver-enveloped superconductor filaments including a superconductive material having a metal component, and a resistive material layer disposed around the superconductor filaments and separating the superconductor filaments from each other, the resistive material layer consists of a carbonate having a metal component which is identical to a metal component included in the superconductor material.

Multi-core BSCCO high-temperature superconductor

A process for the production of at least a one kilogram block of Chevrel-phase Pb.sub.x Mo.sub.y S.sub.z, wherein x=0.9 to 1.2, y=6.0 to 6.4, and z=7 to 8, includes mixing thoroughly stoichiometric quantities of starting materials in powdered form. The starting materials are selected from elemental Pb, Mo and S, sulfides of elemental Pb and Mo, and mixtures thereof. The starting mixture is introduced into a metallic container and evacuated to a pressure to 10.sup.4 Pa or less. The evacuated container is subjected to hot isostatic pressing at a constant pressure selected from a pressure ranging from 100 to 300 MPa, at a heating rate ranging from 10.degree. to 100.degree. C./hr., at a final pressing temperature ranging from 800.degree. to 1200.degree. C., and for a pressing period ranging from 10 to 100 hours, whereby the starting materials react to form the block of Chevrel-phase Pb.sub.x Mo.sub.y S.sub.z. The block is cooled at a cooling rate ranging from 50.degree. to 500.degree. C./hr. while maintaining the constant pressure. The process may include the further steps of filling the metallic container after evacuation with an inert gas; re-evacuating the metallic container to remove the inert gas; and heating the metallic container after re-evacuation at a temperature ranging up to but less than 300.degree., prior to subjecting the metallic container to hot isostatic pressing.

Process for the production of Pb.sub.x Mo.sub.y S.sub.z Chevrel-phase

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Heidelberg, Germany

Wilfried Goldacker