Laminated HTS Wire with Segmented Superconducting Layers
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Solution Overview
Problem
High temperature-superconducting wires exhibit low electro-conductivity, limiting their application to devices generating very low magnetic fields, such as cables, and have not yet achieved performance sufficient for commercialization in liquid nitrogen temperature conditions.
Innovation Solution
A method of manufacturing high temperature-superconducting wire with biaxially textured superconducting layers laminated on a metal substrate, separated by protective layers to reduce alternating current loss, involving thermal treatment and physical separation of substrates, and using materials like rare earth element-barium-copper-oxygen and noble metals for enhanced conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high temperature-superconducting wire is manufactured by coating a superconducting layer on a buffer layer, then the wire exhibits high critical temperature and critical current density, but the electro-conductivity remains low
Solution Approach 1:
The superconducting wire is divided into multiple superconducting layers separated by buffer layers. Each superconducting layer maintains high critical temperature and current density, while the segmented structure improves overall electro-conductivity by reducing interface resistance and enabling better current distribution across layers.
Solution Approach 2:
The wire uses a composite structure combining superconducting layers (e.g., REBCO materials) with buffer layers and metal substrates. This composite design optimizes both the superconducting properties (high Tc and Jc) and the electro-conductivity through careful material selection and interface engineering.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The approach improves electro-conductivity and reduces alternating current loss, enabling the high temperature-superconducting wire to generate magnetic fields of 3 to 5 Tesla at liquid nitrogen temperature, thus accelerating the commercialization of superconducting application devices.
Implementation Method 1
performing thermal treatment to the laminated superconducting wires to join the protective layers together
Implementation Method 2
Superconducting wires are wires made of a material with zero electrical resistance... materials which exhibit superconductivity at 77 K, which is a temperature at which nitrogen is liquid, are referred to as high temperature superconductors (HTS)
Data Source
AI summary
The present invention relates to a high temperature-superconducting wire having a superconducting layer laminated thereon and a method of manufacturing the same. The method includes: preparing a pair of superconducting wires each of which includes a metal substrate, a buffer layer, a superconducting layer, and a protective layer; laminating the pair of superconducting wires to allow respective protective layers to face each other; performing thermal treatment to the laminated superconducting wires to join the protective layers together; separating the metal substrate and the buffer layer from the superconducting layer on one side; and forming a protective layer on an upper part of the superconducting layer having a surface exposed. The present invention provides a high temperature-superconducting wire which includes a plurality of biaxially textured superconducting layers laminated thereby improving electro-conductivity, wherein the plurality of superconducting layers are separated from each other thereby reducing a loss of alternating current.