Superconducting Wire Composition for Fast Growth and Mixed Vortex Pinning
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Solution Overview
Problem
Existing high-temperature superconducting wires face challenges in achieving high critical currents at fast growth rates while maintaining strong pinning of magnetic vortices, leading to high production costs and suboptimal performance.
Innovation Solution
A liquid-assisted processing (LAP) method is employed during the formation of superconducting films, incorporating mixed rare-earth elements and Ba2YNbO6 additives to create a mixed pinning landscape with columnar artificial pinning centers and isotropic point defects, enabling fast growth rates and improved vortex pinning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard superconducting film formation methods are used, then production cost is reduced, but critical current and vortex pinning performance are insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the superconducting film by incorporating mixed rare-earth elements (Y1-xREx) and controlling stoichiometry (rich in Y+RE and Cu compared to stoichiometric YBCO). This compositional parameter change enables both fast growth rates and strong vortex pinning performance, resolving the contradiction between performance and productivity.
Solution Approach 2:
The patent creates a composite superconducting system by combining multiple rare-earth elements (Y, Yb, Sm) with Ba and Cu, and adding Ba2YNbO6 as a separate phase. This composite material approach produces a mixed pinning landscape with both columnar and isotropic pinning centers, achieving high critical currents while maintaining fast growth rates.
2Productivity
If fast growth rates are achieved, then productivity is improved, but vortex pinning performance deteriorates
Solution Approach 1:
The patent incorporates Ba2YNbO6 additives into the superconducting precursor before film formation. This preliminary incorporation ensures that pinning centers are formed during the fast growth process itself, rather than requiring subsequent slow formation steps. The additive prepares the system in advance to maintain strong pinning performance even at high growth rates.
Solution Approach 2:
By adjusting the stoichiometry to be rich in Y+RE and Cu, and controlling the concentration of Ba2YNbO6 additive, the patent optimizes the formation kinetics of pinning centers. This parameter control allows pinning centers to form rapidly alongside the superconducting phase, maintaining vortex pinning performance during fast growth.
3Reliability
If mixed rare-earth elements and additives are incorporated, then vortex pinning performance is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the formation of multiple functional components into a single film deposition step. The mixed rare-earth elements (Y, Yb, Sm), Ba, Cu, and Ba2YNbO6 additives are all incorporated simultaneously during one superconducting film formation process. This consolidation achieves enhanced vortex pinning without requiring separate manufacturing steps for each component.
Solution Approach 2:
The Ba2YNbO6 additive serves multiple functions: it acts as a flux during growth, provides columnar pinning centers through its crystal structure, and influences the stoichiometry of the superconducting phase. This multi-functionality reduces the need for separate process steps, simplifying manufacturing while enhancing pinning performance.
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 LAP method allows for high critical currents to be achieved at lower costs by facilitating fast growth rates and enhancing pinning performance, outperforming standard films by up to six times at 10 K and maintaining high performance across various temperatures and fields.
Implementation Method 1
A liquid-assisted processing (LAP) method is employed during the formation of superconducting films
Implementation Method 2
A superconductor loses all its resistance below critical temperature and a large amount of an electric current may pass through the superconductor without loss
Implementation Method 3
incorporating mixed rare-earth elements and Ba2YNbO6 additives to create a mixed pinning landscape with columnar artificial pinning centers and isotropic point defects, enabling fast growth rates and improved vortex pinning
Data Source
AI summary
Provided is a superconducting wire. The superconducting wire comprises a substrate, a superconducting film on the substrate and a pinning center in the superconducting film. The superconducting film includes Y1-xRExBCO and the pinning center has an additive of Ba2YNbO6.