Method for improving critical current density of Bi-2223 strip material

A bi-2223, critical current technology, applied in the usage of superconductor elements, circuits, electrical components, etc., can solve problems such as no substantial progress, and achieve the effect of improving performance
CN1885443AInactive Publication Date: 2006-12-27TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2006-12-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The disclosed method to improve critical current for a Bi-2223 belt material comprises: polishing the insulating varnish on selected area of the material with fine sand paper, cleaning, and using a dc constant power as electroplating source to output 3V voltage and alter plating time for different coating thickness. This invention can control ac loss fit to large-scale production.
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Description

technical field

[0001] The invention belongs to the field of high-temperature superconducting materials, in particular to a method for increasing the critical current of Bi-2223 strips. Specifically, the critical current is increased by electroplating ferromagnetic materials on the surface of the Bi-2223 strip, and the AC loss is effectively controlled at the same time. It can be practically applied to the large-scale production of Bi-based high-temperature superconducting strips. Background technique

[0002] Existing methods to increase the critical current density of Bi-2223 multi-core strips include optimizing the concentration of cations, improving the sintering process, improving the machining deformation technology, and coating ferromagnets outside the superconducting wire core. However, these methods often lead to unfavorable phenomena such as sausage effect in the wire core, contamination of the superconducting phase, decreased volume ratio of the superconducting p...

Claims

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