Oxide Superconductor with Clustered Atom-Replaced Artificial Pins
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Solution Overview
Problem
Current methods for manufacturing high-temperature oxide superconductors face challenges in achieving stable mass production due to difficulties in composition control, particularly in controlling the presence of elements with significant atomic weight differences, which affects the magnetic field characteristics of superconducting coils.
Innovation Solution
The development of an oxide superconductor with a continuous Perovskite structure containing rare earth elements, including praseodymium, neodymium, samarium, and lutetium, which forms a clustered atom-replaced artificial pin structure to improve magnetic field characteristics, using a method that involves a specific coating solution preparation and firing process to achieve a stable and efficient superconducting wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If physical deposition methods (PLD or MOCVD) are used to manufacture oxide superconductors, then magnetic field characteristics can be improved through artificial pin introduction, but composition control becomes difficult due to the challenge of controlling three kinds of elements with significant atomic weight differences
Solution Approach 1:
The patent changes the manufacturing approach from physical deposition to chemical solution processing, specifically using a mixed solution of metal acetates and perfluorocarboxylic acid. This parameter change enables precise control of multiple elements (Y, Pr, Sm, Lu, Ba, Cu) during the coating process, achieving composition accuracy of 1% or better even for elements with large atomic weight differences, while maintaining the ability to introduce artificial pins for improved magnetic field characteristics
Solution Approach 2:
The patent introduces perfluorocarboxylic acid as an intermediary substance that facilitates the controlled deposition of multiple metal elements from solution. This intermediary enables the formation of a continuous Perovskite structure with precise compositional control, allowing simultaneous incorporation of rare earth elements (Y, Pr, Sm, Lu) and other metals (Ba, Cu) in the required ratios, thereby resolving the composition control difficulty while enabling artificial pin formation
2Productivity
If TFA-MOD method is used for mass production, then stable manufacturing of 500m wire length is achieved with good composition control, but magnetic field characteristics are insufficient compared to PLD or MOCVD methods
Solution Approach 1:
The patent creates a composite structure by combining the TFA-MOD manufacturing approach with a specifically designed mixed solution containing multiple metal acetates and perfluorocarboxylic acid. This composite material system enables both the mass production advantages of TFA-MOD (stable 500m wire length manufacturing) and the improved magnetic field characteristics previously only achievable by PLD/MOCVD, by enabling precise control of artificial pin formation through the chemical solution process
3Stability of the object's composition
If elements with large atomic weight differences (Y, Pr, Sm, Lu) are controlled to achieve 1% composition accuracy, then continuous Perovskite structure can be formed, but the manufacturing process becomes extremely difficult
Solution Approach 1:
The patent changes the manufacturing parameters from physical deposition conditions to chemical solution processing parameters. By using a mixed solution of metal acetates with perfluorocarboxylic acid and controlling the coating, drying, and firing conditions, the patent achieves precise compositional control (1% or better) for elements with large atomic weight differences, enabling continuous Perovskite structure formation while maintaining ease of manufacture through a standardized chemical process
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
This approach enables the production of superconducting wires with enhanced magnetic field characteristics and improved critical current density, overcoming the limitations of existing methods by ensuring precise composition and structure, thus facilitating the use of these wires in applications like superconducting coils and power transmission.
Implementation Method 1
An oxide superconductor includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu)
Implementation Method 2
which forms a clustered atom-replaced artificial pin structure to improve magnetic field characteristics
Data Source
AI summary
An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu). The rare earth elements contain a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).