Mgb2 superconducting wire, method for manufacturing mgb2 superconducting wire, superconducting coil, and magnetic generator
The manufacturing method for MgB2 superconducting wire uses a central material with recesses and spacers to improve barrier layer uniformity, addressing breakage issues and enabling thinner, longer wires with enhanced superconducting properties.
WO2026009501A1 Publication Date: 2026-01-08HITACHI LTD
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Patent Information
- Application Number
- PCT/JP2025/009719
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-07-01
- Filing Date
- 2025-03-13
- Publication Date
- 2026-01-08
AI Technical Summary
Technical Problem
Existing superconducting MgB2 wires face issues with breakage during lengthening and require improvements in barrier layer uniformity and thickness to enable thinner and longer filaments.
Method used
A method for manufacturing MgB2 superconducting wire involving a central material with recesses and spacers to uniformly distribute embedded single-core wires, followed by area reduction and heat treatment, ensuring a three times or less thickness ratio of outer to central barrier layers.
Benefits of technology
The method enhances barrier layer uniformity, reduces defects, and allows for thinner, longer superconducting wires with improved critical current density and reduced material costs.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides: a MgB2 superconducting wire that has a barrier layer of highly uniform thickness covering a MgB2 core and that reduces MgB2 filament defects and is suitable for thinning and lengthening; a MgB2 superconducting wire manufacturing method for manufacturing the same; a superconducting coil using the same; and a magnetic generator including the superconducting coil. A MgB2 superconducting wire (200) comprises: a core material (210); a MgB2 filament (220) in which a MgB2 core (221) is covered with a barrier layer (222); and a metal sheath (230). The MgB2 filament (220) has a barrier layer (222) thickness on the outer peripheral side of the wire not more than three times the barrier layer (222) thickness on the core side of the wire. The method for manufacturing the MgB2 superconducting wire includes a step for forming a single core wire, a step for forming an embedded material, a surface reduction processing step, and a heat treatment step. The embedded material is formed by arranging the single core wire in a recess formed in the outer surface of the core material or by incorporating a spacer in a gap.
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