Oxide Superconducting Wire Orientation Ratio for Higher Critical Current
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Solution Overview
Problem
Conventional superconducting wires with an oxide superconducting layer of EuBa2Cu3Ox have a critical current density that can be improved, as the existing a-axis ratio criteria do not effectively evaluate the orientation and non-oriented portions of the superconducting layer, leading to suboptimal performance.
Innovation Solution
A superconducting wire with a superconducting layer composed of an oxide superconductor, where the intensity ratio of the (006) plane to the sum of the (200), (006), and (103/013) plane intensities is set to be greater than or equal to 0.75, and the layer thickness is optimized between 1.0 μm and 4.5 μm, enhancing the critical current density and critical current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the a-axis ratio criteria (intensity of (200) plane divided by intensity of (006) plane) is used to evaluate the oxide superconducting layer, then the manufacturing process can be simplified, but the critical current density cannot be effectively improved
Solution Approach 1:
The patent changes the evaluation parameter from the conventional a-axis ratio (I(200)/I(006)) to a new parameter that includes the (103) and (013) planes: I(006)/(I(200)+I(006)+I(103)+I(013)). This parameter change enables effective evaluation and improvement of critical current density while maintaining manufacturing feasibility
Solution Approach 2:
The patent replaces the conventional evaluation mechanism (a-axis ratio) with a new evaluation mechanism that incorporates additional crystal plane information. This substitution allows for more accurate assessment of superconducting properties and leads to improved critical current density
2Reliability
If the intensity ratio I(006)/(I(200)+I(006)+I(103)+I(013)) is set to be greater than or equal to 0.75, then the critical current density increases suddenly, but the manufacturing precision requirements increase
Solution Approach 1:
By establishing a specific threshold value (0.75) for the intensity ratio parameter, the patent transforms the continuous optimization problem into a binary evaluation criterion. This makes it easier to control manufacturing precision while achieving sudden improvement in critical current density
Solution Approach 2:
The patent uses X-ray diffraction pattern copying/comparison to evaluate the crystal orientation. By comparing the measured intensity ratios with the target threshold of 0.75, manufacturers can easily assess whether the superconducting layer meets the required orientation standards
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 configuration significantly improves the critical current density and critical current of the superconducting wire, ensuring a high and stable performance by accurately evaluating the orientation and non-oriented portions of the superconducting layer, leading to a sudden increase in critical current density at a specific intensity ratio threshold.
Implementation Method 1
a superconducting layer 20. A material for constituting the superconducting layer 20 is an oxide superconductor
Implementation Method 2
In X-ray diffraction using a two-dimensional detector, a peak corresponding to a (200) plane of the oxide superconductor is defined as a first peak
Implementation Method 3
a value obtained by dividing an intensity of a second peak by a sum of an intensity of a first peak, an intensity of the second peak, and an intensity of a third peak is more than or equal to 0.75
Data Source
AI summary
A superconducting wire includes a superconducting layer. A material for constituting the superconducting layer is an oxide superconductor. In X-ray diffraction using a two-dimensional detector, a peak corresponding to a (200) plane of the oxide superconductor is defined as a first peak, a peak corresponding to a (006) plane of the oxide superconductor is defined as a second peak, and a peak corresponding to a (103) plane or a (013) plane of the oxide superconductor is defined as a third peak. A value obtained by dividing an intensity of the second peak by a sum of an intensity of the first peak, the intensity of the second peak, and an intensity of the third peak is more than or equal to 0.75.