Method and system for preparing second-generation high-temperature superconducting strip
Through inkjet printing technology, wet gel film is formed on the metal baseband and heat-treated, which solves the problem of high equipment cost and uniformity control of the preparation of second-generation high-temperature superconducting strips in the prior art, and realizes efficient and stable preparation of superconducting thin films, which is suitable for industrial production.
Patent Information
- Application Number
- CN202510470400.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-07-11
AI Technical Summary
When preparing second-generation high-temperature superconducting strips, the prior art has problems such as high equipment costs, complex processes, difficult to achieve large-area uniform deposition, and difficult to accurately control the film thickness and uniformity, which limits its industrial production.
The precursors of rare earth elements, Ba elements and Cu elements are printed onto a metal baseband with biaxial texture by inkjet printing to form a wet gel film, and a second-generation high-temperature superconducting strip is prepared through heat treatment to ensure element proportional stability and coating efficiency.
The element ratio of superconducting film is not affected by the surface flatness of the metal baseband, has high process stability, can flexibly adjust the stoichiometric ratio, improves the coating efficiency, and is suitable for industrial and efficient production.
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Figure CN120299818A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of the preparation of second-generation high-temperature superconducting tapes, and particularly to a method and system for preparing second-generation high-temperature superconducting tapes. Background Art
[0002] Depositing a rare-earth-based cuprate REBa2Cu3O 7-y (REBCO, RE is a rare-earth element) superconducting layer on a flexible metal substrate, the coated conductor (also known as the second-generation high-temperature superconducting tape) is considered to be one of the most promising superconducting materials due to its advantages such as high critical current density and high irreversible field. There is an urgent need for second-generation high-temperature superconducting tapes for applications such as kilometer-level superconducting cables, compact controllable nuclear fusion magnets, and ultra-high field magnets.
[0003] In related technologies, the preparation techniques of REBCO superconducting thin films mainly include pulsed laser deposition, metal-organic chemical vapor deposition, and chemical solution deposition, etc. These preparation methods all require multiple preparations of different targets or precursor solutions in studying the effects of stoichiometry and doping on their microstructure and superconductivity. Pulsed laser deposition and metal-organic chemical vapor deposition also face problems such as high equipment cost, complex process, and difficulty in achieving large-area uniform deposition. Although chemical solution deposition has a lower cost, it requires multiple coatings and heat treatments during the preparation process, with a longer process cycle, and it is difficult to precisely control the thickness and uniformity of the thin film. These problems limit its further industrial production.
[0004] In order to prepare second-generation high-temperature superconducting tapes, this application provides a method and system for preparing second-generation high-temperature superconducting tapes. Summary of the Invention
[0005] Embodiments of this application provide a method and system for preparing second-generation high-temperature superconducting tapes to prepare second-generation high-temperature superconducting tapes.
[0006] In a first aspect, embodiments of this application provide a method for preparing a second-generation high-temperature superconducting tape, including:
[0007] Preparing a plurality of precursor solutions respectively including rare-earth elements, Ba elements, and Cu elements;
[0008] Printing all the precursor solutions onto a metal substrate with a biaxial texture by means of inkjet printing to form a wet gel film;
[0009] Performing heat treatment on the wet gel film to complete the preparation of the second-generation high-temperature superconducting tape.
[0010] In a feasible implementation manner, the preparing a plurality of precursor solutions respectively including rare-earth elements, Ba elements, and Cu elements includes:
[0011] Dissolve the acetates corresponding to the rare earth element, the Ba element, and the Cu element into the corresponding solvents respectively to prepare the corresponding precursor solutions.
[0012] In a feasible implementation, the rare earth element includes at least one of yttrium, neodymium, samarium, europium, gadolinium, dysprosium, and ytterbium.
[0013] In a feasible implementation, the solvent includes at least one of a methanol solution and a propionic acid solution.
[0014] In a feasible implementation, the cation concentration range in the precursor solution is 0.1 mol / L to 3 mol / L.
[0015] In a feasible implementation, the precursor solution needs to be subjected to 2 to 3 repeated reduced-pressure distillations in a rotary evaporator to remove impurities, then add the required amount of solvent, and stir and dissolve for 24 hours with the assistance of ultrasonic waves. The frequency range of the ultrasonic waves is 20 kHz to 40 kHz.
[0016] In a feasible implementation, the nozzle of the inkjet printing is configured as a micro-piezoelectric nozzle;
[0017] And / or, the number of the micro-piezoelectric nozzles is at least 3;
[0018] And / or, the diameter range of the micro-piezoelectric nozzle is 1 μm to 40 μm, the resolution range is 100 dpi to 300 dpi, the size range of the ink droplets ejected by the micro-piezoelectric nozzle is 10 pl to 100 pl, and the distance range between the micro-piezoelectric nozzle and the metal baseband is 0.1 mm to 2 mm;
[0019] And / or, during the inkjet printing process, the moving rate range of the micro-piezoelectric nozzle is 0.1 m / s to 1 m / s, and the voltage range is 0 to 100 V.
[0020] In a feasible implementation, the metal baseband is configured to have biaxially textured CeO2 / YSZ / Y2O3 deposited on a nickel-based baseband;
[0021] Or, the metal baseband is configured to have biaxially textured MgO deposited on a nickel-based baseband;
[0022] Or, the metal baseband is configured to have biaxially textured CeO2 / LaMnO3 / MgO / Y2O3 deposited on a nickel-based baseband.
[0023] In a feasible implementation, the stoichiometric ratio of the rare earth element, the Ba element, and the Cu element is 0.5 - 2.5:1.5 - 2.5:2.5 - 3.5;
[0024] And / or, the precursor solution further includes a doping element or a doped oxide, the doping element includes at least one of Zr element, Hf element and Ti element, and the doped oxide includes at least one of BaHfO3 and BaTiO3.
[0025] In a second aspect, an embodiment of the present application further provides a preparation system for a second-generation high-temperature superconducting tape, which uses the preparation method for a second-generation high-temperature superconducting tape described in the first aspect to prepare the second-generation high-temperature superconducting tape.
[0026] An embodiment of the present application provides a preparation method for a second-generation high-temperature superconducting tape, including separately preparing a plurality of precursor solutions including rare earth elements, Ba elements, and Cu elements; using an inkjet printing method to print all the precursor solutions onto a metal base tape with a bi-axial texture to form a wet gel film; and heat-treating the wet gel film to complete the preparation of the second-generation high-temperature superconducting tape. The present application uses an inkjet printing method to prepare the second-generation high-temperature superconducting tape, which can ensure that the element ratio of the superconducting thin film is not affected by the surface flatness of the metal base tape, and has high process stability. In addition, this method can also improve the coating efficiency. Compared with the traditional preparation process for second-generation high-temperature superconducting wire tapes, the solution of the present application has a simple process, can flexibly adjust the stoichiometric ratio of each element in the superconducting thin film on the surface of the second-generation high-temperature superconducting tape, and is beneficial to studying the changes in superconducting properties caused by the changes in the content of different elements. At the same time, the solution of the present application can accurately control the proportion of each component in the process, providing a guarantee for the industrialized and efficient continuous production of second-generation high-temperature superconducting tapes.
[0027] In a second aspect, an embodiment of the present application further provides a preparation system for a second-generation high-temperature superconducting tape, which uses the preparation method for a second-generation high-temperature superconducting tape described in the first aspect to prepare the second-generation high-temperature superconducting tape. Since the preparation system for the second-generation high-temperature superconducting tape includes the preparation method for the second-generation high-temperature superconducting tape in any of the above technical solutions, it has all the beneficial effects of the preparation method for the second-generation high-temperature superconducting tape in any of the above technical solutions, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation to the present invention.
[0029] In the drawings:
[0030] Figure 1 is a schematic flow chart of the preparation method for a second-generation high-temperature superconducting tape provided by an embodiment of the present application;
[0031] Figure 2is the YBa2Cu3O prepared in Example 1 7-y XRD pattern of the second-generation high-temperature superconducting tape;
[0032] Figure 3 is the YBa2Cu3O prepared in Example 1 7-y SEM pattern of the second-generation high-temperature superconducting tape. Detailed implementation manners
[0033] To enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0034] In the description of the embodiments of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection; it may be directly connected, or indirectly connected through an intermediate medium. It may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0036] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.
[0037] Coated conductors that deposit rare-earth-based cuprates REBa2Cu3O7-y (REBCO, where RE is a rare-earth element) superconducting layers on flexible metal substrates (also known as second-generation high-temperature superconducting tapes) are considered to be one of the most promising superconducting materials due to their advantages such as high critical current density and high irreversible field. For applications such as kilometer-scale superconducting cables, compact controllable fusion magnets, and ultra-high-field magnets, there is an urgent need for second-generation high-temperature superconducting tapes.
[0038] In related technologies, the preparation techniques of REBCO superconducting thin films mainly include pulsed laser deposition, metal-organic chemical vapor deposition, and chemical solution deposition, etc. In studying the effects of stoichiometry and doping on their microstructure and superconductivity, these preparation methods all require multiple preparations of different targets or precursor solutions. Pulsed laser deposition and metal-organic chemical vapor deposition also face problems such as high equipment cost, complex processes, and difficulty in achieving large-area uniform deposition. Although chemical solution deposition has a lower cost, it requires multiple coatings and heat treatments during the preparation process, with a long process cycle, and it is difficult to precisely control the thickness and uniformity of the thin film. These problems limit its further industrial production.
[0039] To prepare second-generation high-temperature superconducting tapes, the present application provides a preparation method and system for second-generation high-temperature superconducting tapes.
[0040] The following will detail the solutions provided in the embodiments of the present application in conjunction with the accompanying drawings of the specification.
[0041] Figure 1 It is a schematic flowchart of the preparation method of the second-generation high-temperature superconducting tape provided in an embodiment of the present application.
[0042] Referring to Figure 1 As shown, in a first aspect, the embodiment of the present application provides a preparation method for a second-generation high-temperature superconducting tape, including:
[0043] S100: Prepare a variety of precursor solutions respectively including rare-earth elements, Ba elements, and Cu elements.
[0044] Specifically, dissolve the acetates corresponding to rare-earth elements, Ba elements, and Cu elements respectively into multiple solvents to prepare a variety of precursor solutions. That is to say, dissolve the acetate corresponding to rare-earth elements into one solvent, the acetate corresponding to Ba elements into one solvent, and the acetate corresponding to Cu elements into one solvent, and finally prepare three precursor solutions in total. The stoichiometric ratios of rare-earth elements, Ba elements, and Cu elements are 0.5 - 2.5:1.5 - 2.5:2.5 - 3.5. Additionally, by way of example, rare-earth elements include at least one of yttrium, neodymium, samarium, europium, gadolinium, dysprosium, and ytterbium; the solvents include at least one of methanol solution and propionic acid solution.
[0045] In this precursor solution, the concentration range of the cations is 0.1 mol / L to 3 mol / L.
[0046] In some other examples, the precursor solution further includes doping elements or doped oxides. The doping elements may include at least one of Zr element, Hf element, and Ti element, and the doped oxides include at least one of BaHfO3 and BaTiO3.
[0047] In addition, during the preparation of the precursor solution, the preliminarily prepared precursor solution needs to be subjected to repeated reduced-pressure distillation 2 to 3 times in a rotary evaporator to remove impurities, then the required amount of solvent is added, and it is stirred and dissolved for 24 hours with the assistance of ultrasonic waves. The frequency range of the ultrasonic waves can be 20 kHz to 40 kHz.
[0048] S200: Print all the precursor solutions onto a metal substrate with a biaxial texture by means of inkjet printing to form a wet gel film.
[0049] Exemplarily, the inkjet printing nozzle is configured as a micro-piezoelectric nozzle. The number of micro-piezoelectric nozzles is at least 3. The specific number of micro-piezoelectric nozzles corresponds to the type of the precursor solution. Each micro-piezoelectric nozzle is used to spray a kind of precursor solution. The diameter range of the micro-piezoelectric nozzle is 1 μm to 40 μm, the resolution range is 100 dpi to 300 dpi, the size range of the ink droplets ejected by the micro-piezoelectric nozzle is 10 pl to 100 pl, and the distance range between the micro-piezoelectric nozzle and the metal substrate is 0.1 mm to 2 mm. During the inkjet printing process, the moving rate range of the micro-piezoelectric nozzle is 0.1 m / s to 1 m / s, and the voltage range is 0 to 100 V.
[0050] In addition, in some examples, the metal substrate is configured to have a biaxial texture of CeO2 / YSZ / Y2O3 deposited on a nickel-based substrate;
[0051] In some other examples, the metal substrate is configured to have a biaxial texture of MgO deposited on a nickel-based substrate;
[0052] In some other examples, the metal substrate is configured to have a biaxial texture of CeO2 / LaMnO3 / MgO / Y2O3 deposited on a nickel-based substrate.
[0053] S300: Heat-treat the wet gel film to complete the preparation of the second-generation high-temperature superconducting tape.
[0054] When the wet gel film is heat treated, the wet gel film is placed in a tubular furnace, and under wet oxygen conditions, the temperature in the net tubular furnace is raised to 400°C to 500°C, and the temperature is maintained for 60 minutes. Then the oxygen partial pressure in the tubular furnace is adjusted to 1mTorr to 50mTorr, and the temperature is adjusted to 700°C to 900°C, and then the temperature is maintained for no more than 20 minutes. Finally, the tubular furnace is adjusted to a pure oxygen environment, the temperature is adjusted to 400 to 600°C, and maintained for 120 minutes to 180 minutes, and finally the furnace is cooled to room temperature to prepare a second-generation high-temperature superconducting tape, that is, a superconducting film. The thickness of the second-generation high-temperature superconducting tape is greater than 2μm, and the critical current density under 77K self-field conditions is greater than 2MA / cm 2 .
[0055] In order to better illustrate the solution of the present application, four specific embodiments are provided below.
[0056] Embodiment 1
[0057] YBa2Cu3O 7-y Taking the preparation process of the second-generation high-temperature superconducting tape as an example, the specific implementation method of the process disclosed in the present invention is explained.
[0058] Step 1: Dissolve yttrium acetate, barium acetate and copper acetate in propionic acid solution respectively to obtain three precursor solutions with a cation concentration of 0.7 mol / L.
[0059] Step 2: Use three micro-piezoelectric nozzles to print the three precursor solutions onto the CeO2 / LaMnO3 / MgO / Y2O metal substrate with biaxial texture by inkjet printing to obtain a wet gel film. The diameter of the micro-piezoelectric nozzle is 10μm, the resolution is 200dpi, the ink drop size is 50pl, the distance between the micro-piezoelectric nozzle and the metal substrate is 1.0mm, the nozzle movement speed is 0.5m / s, and the voltage is 20V.
[0060] Step three: Place the wet gel film in a tubular furnace and thermally decompose it in a wet oxygen environment at 450°C for 40 minutes. Then, introduce a nitrogen-oxygen mixed gas with an oxygen partial pressure of 10mTorr into the tubular furnace, increase the temperature in the tubular furnace to 800°C, and allow the wet gel film to crystallize at 800°C for 5 minutes. Finally, introduce 100% pure oxygen into the tubular furnace, adjust the temperature in the furnace to 500°C, and allow the wet gel film to absorb oxygen at 500°C for 150 minutes. Finally, cool the wet gel film to room temperature in the furnace to obtain a thickness of 2μm and a critical current density of 2.0MA / cm under 77K self-field conditions. 2 The second generation of high-temperature superconducting tapes, that is, superconducting films.
[0061] Figure 2 The YBa2Cu3O prepared in Example 17-y XRD pattern of the second-generation high-temperature superconducting tape, as Figure 2 shown. From the test results of XRD (X-Ray Diffraction), it can be seen that a superconducting thin film with good orientation has grown on the CeO2 buffer layer of the second-generation high-temperature superconducting tape of YBa2Cu3O 7-y Figure 3 is the YBa2Cu3O prepared in Example 1 7-y SEM pattern of the second-generation high-temperature superconducting tape. As Figure 3 shown in the SEM (Scanning Electron Microscope) pattern, the surface morphology of the second-generation high-temperature superconducting tape of YBa2Cu3O 7-y is uniform and there are no large particle impurities.
[0062] Example Two
[0063] Taking the preparation process of the second-generation high-temperature superconducting tape of Y 0.5 Gd 0.5 Ba2Cu3O 7-y as an example, the specific implementation manner of the process disclosed in the present invention is described.
[0064] Step 1: Dissolve yttrium acetate, gadolinium acetate, barium acetate and copper acetate into propionic acid solution respectively to obtain four precursor solutions with a cation concentration of 0.5 mol / L.
[0065] Step 2: Use four micro-piezoelectric nozzles to print the four precursor solutions onto a CeO2 / LaMnO3 / MgO / Y2O metal substrate with biaxial texture by inkjet printing to obtain a wet gel film. Among them, the diameter of the micro-piezoelectric nozzle is 15 μm, the resolution is 250 dpi, the ink droplet size is 30 pl, the distance between the micro-piezoelectric nozzle and the metal substrate is 1.0 mm, the nozzle moving speed is 0.8 m / s, and the voltage is 30 V.
[0066] Step 3: Place the wet gel film in a tube furnace and thermally decompose it in a wet oxygen environment at 450 °C for 40 min. Subsequently, introduce a nitrogen-oxygen mixed gas with an oxygen partial pressure of 10 mTorr into the tube furnace, raise the temperature in the tube furnace to 820 °C, and the wet gel film crystallizes at high temperature at 820 °C for 10 min. Finally, introduce pure oxygen with a purity of 100% into the tube furnace and adjust the temperature in the furnace to 500 °C, and the wet gel film is subjected to oxygen absorption treatment at 500 °C for 180 min. Finally, the wet gel film is cooled to room temperature in the furnace to obtain a second-generation high-temperature superconducting tape with a thickness of 2.3 μm and a critical current density of 2.5 MA / cm 2 under the self-field condition at 77 K, that is, a superconducting thin film.
[0067] Example 3
[0068] Taking Y x Ba2Cu3O 7-y the preparation process of the second-generation high-temperature superconducting tape as an example, the specific implementation manner of the process disclosed by the present invention will be described.
[0069] Step 1: Dissolve yttrium acetate, barium acetate, and copper acetate into propionic acid solution respectively to obtain four precursor solutions with a cation concentration of 0.5 mol / L.
[0070] Step 2: Use three micro-piezoelectric nozzles to print the three precursor solutions onto a CeO2 / LaMnO3 / MgO / Y2O metal substrate with a biaxial texture by inkjet printing to obtain a wet gel film. Among them, the diameter of the micro-piezoelectric nozzle is 10 μm, the resolution is 200 dpi, the ink droplet size is 20 pl, the distance between the micro-piezoelectric nozzle and the metal substrate is 1.0 mm, the nozzle moving rate is 0.8 m / s, and the voltage is 30 V.
[0071] Step 3: Place the wet gel film in a tubular furnace and thermally decompose it in a wet oxygen environment at 450 °C for 40 min. Subsequently, introduce a nitrogen-oxygen mixed gas with an oxygen partial pressure of 10 mTorr into the tubular furnace, raise the temperature in the tubular furnace to 810 °C, and perform high-temperature crystallization of the wet gel film at 810 °C for 20 min. Finally, introduce pure oxygen with a purity of 100% into the tubular furnace and adjust the temperature in the furnace to 500 °C, and perform oxygen absorption treatment on the wet gel film at 500 °C for 180 min. Finally, cool the wet gel film in the furnace to room temperature to obtain a second-generation high-temperature superconducting tape with a thickness of 3 μm and a critical current density of 4 MA / cm 2 under the self-field condition at 77 K, that is, a superconducting thin film.
[0072] Example 4
[0073] Taking the preparation process of a second-generation high-temperature superconducting tape of YBaCuO doped with BaHfO3 as an example, the specific implementation manner of the process disclosed by the present invention will be described.
[0074] Step 1: Dissolve yttrium acetate, barium acetate, copper acetate, and hafnium acetylacetonate into propionic acid solution respectively to obtain four precursor solutions with a cation concentration of 0.8 mol / L.
[0075] Step 2: Use four micro-piezoelectric nozzles to print the four precursor solutions onto a CeO2 / LaMnO3 / MgO / Y2O metal substrate with a biaxial texture by inkjet printing to obtain a wet gel film. Among them, the diameter of the micro-piezoelectric nozzle is 10 μm, the resolution is 150 dpi, the ink droplet size is 10 pl, the distance between the micro-piezoelectric nozzle and the metal substrate is 1.0 mm, the nozzle moving rate is 0.8 m / s, and the voltage is 20 V.
[0076] Step 3: Place the wet gel film in a tube furnace and thermally decompose it in a wet oxygen environment at 500 °C for 50 min. Subsequently, introduce a nitrogen-oxygen mixed gas with an oxygen partial pressure of 10 mTorr into the tube furnace, raise the temperature inside the tube furnace to 830 °C, and perform high-temperature crystallization of the wet gel film at 830 °C for 20 min. Finally, introduce pure oxygen with a purity of 100% into the tube furnace, adjust the temperature inside the furnace to 500 °C, and perform oxygen absorption treatment on the wet gel film at 500 °C for 180 min. Finally, cool the wet gel film in the furnace to room temperature to obtain a second-generation high-temperature superconducting tape with a thickness of 2.5 μm and a critical current density of 3.2 MA / cm 2 at 77 K under self-field conditions, that is, a superconducting thin film.
[0077] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown according to the indications of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.
[0078] In a second aspect, the embodiments of the present application further provide a preparation system for a second-generation high-temperature superconducting tape, which uses the preparation method of the second-generation high-temperature superconducting tape described in the first aspect to prepare the second-generation high-temperature superconducting tape. Since the preparation system for the second-generation high-temperature superconducting tape includes the preparation method of the second-generation high-temperature superconducting tape in any of the above technical solutions, it thus has all the beneficial effects of the preparation method of the second-generation high-temperature superconducting tape in any of the above technical solutions, which will not be elaborated here.
[0079] It is easy to understand that those skilled in the art can combine, split, recombine, etc. the embodiments of the present application based on several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.
[0080] The above specific implementation manners further elaborate the purpose, technical solutions, and beneficial effects of the embodiments of the present application. It should be understood that the above are only the specific implementation manners of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.
Claims
1. A preparation method of a second-generation high-temperature superconducting tape, characterized in that, Including: Preparing a plurality of precursor solutions respectively including rare earth elements, Ba elements and Cu elements; Printing all the precursor solutions onto a metal substrate with a biaxial texture by means of inkjet printing to form a wet gel film; Performing heat treatment on the wet gel film to prepare the second-generation high-temperature superconducting tape.
2. The preparation method of the second-generation high-temperature superconducting tape according to claim 1, characterized in that, The preparation of the plurality of precursor solutions respectively including rare earth elements, Ba elements and Cu elements includes: Dissolving acetates corresponding to the rare earth elements, the Ba elements and the Cu elements respectively into corresponding solvents to prepare the corresponding precursor solutions.
3. The preparation method of the second-generation high-temperature superconducting tape according to claim 2, characterized in that The rare earth elements include at least one of yttrium, neodymium, samarium, europium, gadolinium, dysprosium and ytterbium.
4. The preparation method of the second-generation high-temperature superconducting tape according to claim 3, wherein, The solvent includes at least one of a methanol solution and a propionic acid solution.
5. The preparation method of the second-generation high-temperature superconducting tape according to claim 4, characterized in that, The cation concentration range in the precursor solution is 0.1 mol / L to 3 mol / L.
6. The preparation method of the second-generation high-temperature superconducting tape according to claim 5, characterized in that, The precursor solution needs to be subjected to 2 to 3 times of repeated reduced-pressure distillation in a rotary evaporator to remove impurities, then add the required amount of solvent, and stir and dissolve for 24 hours with the assistance of ultrasonic waves, and the frequency range of the ultrasonic waves is 20 kHz to 40 kHz.
7. The preparation method of the second-generation high-temperature superconducting tape according to claim 1, characterized in that, The nozzle of the inkjet printing is configured as a micro-piezoelectric nozzle; And / or, the number of the micro-piezoelectric nozzles is at least 3; And / or, the diameter range of the micro-piezoelectric nozzle is 1 μm to 40 μm, the resolution range is 100 dpi to 300 dpi, the size range of the ink droplets ejected by the micro-piezoelectric nozzle is 10 pl to 100 pl, and the distance range between the micro-piezoelectric nozzle and the metal substrate is 0.1 mm to 2 mm; And / or, during the inkjet printing process, the moving rate range of the micro-piezoelectric nozzle is 0.1 m / s to 1 m / s, and the voltage range is 0 to 100 V.
8. The preparation method of the second-generation high-temperature superconducting tape according to claim 1, characterized in that The metal substrate is configured to have CeO2 / YSZ / Y2O3 with a biaxial texture deposited on a nickel-based substrate; Or, the metal substrate is configured to have MgO with a biaxial texture deposited on a nickel-based substrate; Or, the metal substrate is configured to have CeO2 / LaMnO3 / MgO / Y2O3 with a biaxial texture deposited on a nickel-based substrate.
9. The preparation method of the second-generation high-temperature superconducting tape according to claim 1, characterized in that The stoichiometric ratio of the rare earth elements, the Ba elements and the Cu elements is 0.5 - 2.5:1.5 - 2.5:2.5 - 3.5; And / or, the precursor solution further includes a doping element or a doped oxide, the doping element includes at least one of Zr element, Hf element and Ti element, and the doped oxide includes at least one of BaHfO3 and BaTiO3.
10. A preparation system for second-generation high-temperature superconducting tapes, characterized in that, Preparing a second-generation high-temperature superconducting tape by using the preparation method of the second-generation high-temperature superconducting tape according to any one of claims 1 - 9.