Method for preparing high-performance rebco high-temperature superconducting bulk material on basis of layered precursor green body

Abstract

The present invention relates to the technical field of high-temperature superconducting materials. Provided is a method for preparing a high-performance REBCO high-temperature superconducting bulk material on the basis of a layered precursor green body, the method comprising: acquiring starting materials at preset molar ratios, and using a solid-phase sintering method to prepare starting powder mixtures; on the basis of the starting powder mixtures, performing mixing to prepare a precursor powder combination; allowing the precursor powder combination to undergo pressing to obtain a composite precursor green body and a buffer layer; on the basis of a preset top-seeded melt-textured growth method, treating a REBCO original seed crystal, the composite precursor green body and the buffer layer to obtain an initial REBCO high-temperature superconducting bulk material; and, on the basis of the initial REBCO high-temperature superconducting bulk material, performing heat treatment to obtain a final REBCO high-temperature superconducting bulk material. By means of layered preparation and formation of a composite precursor green body, the present invention achieves redistribution of refined particles inside a solid solution, improving the superconducting performance of bulk materials while maintaining a lower porosity, thereby enhancing the overall performance of materials.

Description

Method for preparing high-performance REBCO high-temperature superconducting bulk material based on layered precursor embryo TECHNICAL FIELD

[0001] The present application relates to the technical field of high-temperature superconducting materials, in particular to a method for preparing high-performance REBCO high-temperature superconducting bulk material based on layered precursor embryo. BACKGROUND

[0002] In the field of superconducting materials, REBCO (RE represents light rare earth elements such as Y, Gd, Sm, Nd, etc.) high-temperature superconducting bulk material is widely concerned and favored in the fields of energy, transportation, medical treatment, etc. due to its "three high" characteristics of high superconducting transition temperature, high critical current density and high critical magnetic field. Since its advent, scientists have conducted in-depth research and exploration on the preparation method of REBCO high-temperature superconducting bulk material to continuously improve the performance of the material. However, the current preparation technology faces significant challenges. In the growth process of REBCO superconducting bulk material, RE211 (RE2BaCuOx) particles in the melt system are embedded in the RE123 (REBa2Cu3O 7-δ ) matrix to form pinning centers that have a decisive effect on superconducting performance. In order to improve the superconducting performance of the superconducting bulk material, it is necessary to refine and uniformly distribute the RE211 particles. However, the existing precursor powder combination method (MPP) can refine the particle size of RE211 particles and optimize their distribution, but due to the introduction of additional oxygen, the final sample has serious pore distribution, which deteriorates the mechanical properties of the superconducting bulk material and affects its reliability in practical applications.

[0003] Based on the shortcomings of the prior art, there is an urgent need for a method for preparing high-performance REBCO high-temperature superconducting bulk material based on layered precursor embryo. SUMMARY

[0004] The purpose of the present application is to provide a method for preparing high-performance REBCO high-temperature superconducting bulk material based on layered precursor embryo to improve the above problems. In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] The present application provides a method for preparing high-performance REBCO high-temperature superconducting bulk material based on layered precursor embryo, comprising:

[0006] Obtaining raw medicines with a predetermined molar ratio, and preparing an original powder combination by using a solid-phase sintering method;

[0007] Preparation of a precursor powder combination from the original powder combination mixture, the precursor powder combination comprising a first precursor powder, a second precursor powder and a buffer layer powder, the second precursor powder having a finer particle proportion greater than that of the first precursor powder;

[0008] Based on the preset embryo preparation method, the precursor powder combination is compressed to obtain a combined precursor embryo and a buffer layer, and the combined precursor embryo comprises a second precursor embryo arranged on the bottom and a first precursor embryo coaxially and peripherally arranged above the second precursor embryo;

[0009] Based on the preset top seed crystal melting texture method, the REBCO original seed crystal, the combined precursor embryo and the buffer layer are processed to obtain an initial REBCO high-temperature superconducting bulk material;

[0010] According to the initial REBCO high-temperature superconducting bulk material, heat treatment is performed to obtain a final REBCO high-temperature superconducting bulk material.

[0011] The beneficial effects of the present application are:

[0012] The present application optimizes the process by preparing and forming the combined precursor embryo in layers, realizes the redistribution of fine particles in the solid melt, improves the superconducting performance of the bulk material while maintaining the porosity at about 18%, and enhances the overall performance of the material.

[0013] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application as described in the written description and claims. The objects and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained from these drawings without creative labor.

[0015] Fig. 1 is a flow chart of the method for preparing a high-performance REBCO high-temperature superconducting bulk material based on a layered precursor embryo according to an embodiment of the present application;

[0016] Fig. 2 is a test result graph of the porosity and the average number of pores per unit area of different samples. DETAILED DESCRIPTION

[0017] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings of the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0018] It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0019] As shown in FIG. 1, the present embodiment provides a method for preparing a high-performance REBCO high-temperature superconducting bulk material based on a layered precursor embryo, wherein RE in the REBCO high-temperature superconducting bulk material is selected from rare earth elements such as Y, Gd, Sm, and Nd. The method comprises steps S100, S200, S300, S400, and S500.

[0020] Step S100: obtaining raw medicines with a preset molar ratio, and preparing an original powder combination by using a solid-phase sintering method;

[0021] It should be noted that step S100 comprises steps S110, S120, and S130.

[0022] Step S110: weighing three raw medicines according to molar ratios of RE2O3:BaCO3:CuO = 1:4:6, 1:1:1, and 0:2:3;

[0023] Step S120: mixing the three raw medicines respectively to prepare RE123 original powder, RE211 original powder, and RE023 original powder;

[0024] Step S130: preparing the RE123 original powder, the RE211 original powder, and the RE023 original powder by using a solid-phase sintering method to obtain purified RE123 powder, RE211 powder, and RE023 powder.

[0025] It can be understood that the solid phase sintering method is a method of combining powder materials with each other and forming a dense material without melting by heating the powder materials to their solid phase reaction temperature. For the preparation of REBCO superconducting bulk materials, the solid phase sintering method helps to improve the purity and crystallinity of the original powder, thereby optimizing the subsequent processing and performance. It should be noted that step S130 includes step S131 and step S132.

[0026] Step S131, sintering the RE123 original powder in an air environment at 920℃ for 48 hours, sintering the RE211 original powder in an air environment at 930℃ for 48 hours, and sintering the RE023 original powder in an air environment at 880℃ for 48 hours, to obtain sintered RE123 powder blocks, RE211 powder blocks and RE023 powder blocks;

[0027] Step S132, grinding and sintering the sintered RE123 powder blocks, RE211 powder blocks and RE023 powder blocks, repeated three times, to obtain purified RE123 powder, RE211 powder and RE023 powder.

[0028] Step S200, a precursor powder combination is prepared according to the combination of the original powders, the precursor powder combination includes a first precursor powder, a second precursor powder and a buffer layer powder, the second precursor powder has a smaller particle size than the first precursor powder;

[0029] It should be noted that the first precursor powder is composed of RE123 and RE211, which is a traditional precursor powder formula (CPP), and the particle size is relatively large. The second precursor powder is composed of RE200 and RE023, which is a fine precursor powder formula (MPP). It should be noted that step S200 includes step S210, step S220 and step S230.

[0030] Step S210, RE123 powder and RE211 powder are weighed and mixed according to a molar ratio of 1:0.35, and 1wt% of CeO2 powder is added to the mixed powder for mixing treatment, to obtain the first precursor powder;

[0031] Step S220, RE200 powder and RE023 powder are weighed and mixed according to a molar ratio of 0.72:1, and 1wt% of CeO2 powder is added to the mixed powder for mixing treatment, to obtain the second precursor powder;

[0032] Step S230, RE123 powder and RE211 powder are weighed and mixed according to a molar ratio of 1:0.4, and 1wt% of CeO2 powder is added to the mixed powder for mixing treatment, to obtain the buffer layer powder.

[0033] Step S300, based on the preset embryo preparation method, a combined precursor embryo and a buffer layer are obtained by using precursor powder combination pressing, the combined precursor embryo includes a second precursor embryo arranged at the bottom and a first precursor embryo coaxially and equally placed above the second precursor embryo;

[0034] It can be understood that the hierarchical design of the first precursor embryo and the second precursor embryo is to optimize the microstructure of the superconducting bulk material. The second precursor embryo at the bottom can form more pinning centers due to containing more refined particles, thereby improving the superconducting performance of the lower layer region. The first precursor embryo at the upper layer serves to provide mechanical strength. It should be noted that step S300 includes step S310, step S320, step S330 and step S340.

[0035] Step S310, 20g of the first precursor powder is weighed and placed into a square mold with a side length of 30mm for pressure pressing treatment to obtain the first precursor embryo;

[0036] Step S320, 20g of the second precursor powder is weighed and placed into a square mold with a side length of 30mm for pressure pressing treatment to obtain the second precursor embryo;

[0037] Step S330, the first precursor embryo is coaxially and equally placed above the second precursor embryo to obtain the combined precursor embryo;

[0038] Step S340, 0.25g of the buffer layer powder is weighed and placed into a cylindrical mold with a diameter of 6mm for pressure pressing treatment to obtain the buffer layer.

[0039] Step S400, based on the preset top seed crystal melting texture method, the REBCO original seed crystal, the combined precursor embryo and the buffer layer are processed to obtain an initial REBCO high-temperature superconducting bulk material;

[0040] It can be understood that the top seed crystal melting texture method (TSMG) is a seed crystal induced growth technology used to prepare high-performance REBCO high-temperature superconducting bulk materials. By controlling the melting temperature and cooling rate, the seed crystal can induce the lower layer combined precursor embryo to form a textured superconducting phase. It should be noted that step S400 includes step S410 and step S420.

[0041] Step S410, the buffer layer is inserted between the REBCO original seed crystal and the combined precursor embryo to obtain a coaxial combined structure, the coaxial combined structure includes the REBCO original seed crystal, the buffer layer and the combined precursor embryo coaxially from top to bottom;

[0042] It can be understood that the coaxial combination structure ensures the close contact between the seed crystal, the buffer layer and the precursor embryo, which helps to induce uniform heat conduction and chemical composition diffusion in the growth process. It should be noted that step S410 includes step S411 and step S412.

[0043] Step S411, select a 3mm x 3mm x 3mm REBCO original seed crystal with a smooth base surface, polish the base surface of the REBCO original seed crystal to obtain a treated REBCO original seed crystal.

[0044] Step S412, the center axis of the treated REBCO original seed crystal perpendicular to the ground is respectively corresponding to the center axis of the buffer layer and the center axis of the combined precursor embryo, and the REBCO original seed crystal is placed between the buffer layer and the combined precursor embryo, to obtain a coaxial combination structure.

[0045] Step S420, place the combined structure on an alumina ceramic plate and place it in a high-temperature furnace in an air atmosphere for texture growth, to obtain an initial REBCO high-temperature superconducting bulk material induced by the REBCO original seed crystal.

[0046] It can be understood that this step uses the crystal direction guiding effect of the REBCO original seed crystal to form a high-quality superconducting phase structure through melt texture growth, thereby improving the superconducting performance. It should be noted that step S420 includes step S421, step S422 and step S423.

[0047] Step S421, the temperature in the high-temperature furnace is increased from room temperature to 900℃ for 1h and kept for 3h, then continues to heat for 1h, and the temperature in the high-temperature furnace is increased to 1055℃ and kept for 1h.

[0048] Step S422, reduce the furnace temperature to 1005℃ within 30 minutes, then reduce the furnace temperature at a rate of 0.2K / h to 0.4K / h, so that the REBCO original seed crystal in the furnace induces the growth of the combined precursor embryo for 100h.

[0049] It should be noted that the above temperature program is applicable to the preparation of YBCO superconducting bulk material using a top seed melt texture method, wherein the top seed is a SmBCO seed crystal.

[0050] In some embodiments, the temperature program for the textured growth of the GdBCO superconducting bulk material prepared by the top seeded (SmBCO seed) melt textured method is as follows: the temperature is raised from room temperature to 900 °C in 1 h and kept for 3 h; then the temperature is raised to the maximum temperature (Tm) 1055 °C in 1 h and kept for 1 h; the temperature is rapidly decreased to 1045 °C within 10 min; then the temperature is decreased at a rate of 0.3 K / h to 0.6 K / h, so that the GdBCO sample in the furnace grows slowly for 100 h; after the sample growth is completed, the temperature is rapidly decreased to room temperature in 3 h, and a GdBCO high temperature superconducting bulk material is prepared.

[0051] Similarly, the temperature program for the textured growth of the SmBCO superconducting bulk material prepared by the top seeded (NdBCO seed) melt textured method is as follows: the temperature is raised from room temperature to 900 °C in 1 h and kept for 3 h; then the temperature is raised to the maximum temperature (Tm) 1075 °C in 1 h and kept for 1 h; the temperature is rapidly decreased to 1060 °C within 10 min; then the temperature is decreased at a rate of 0.3 K / h to 0.6 K / h, so that the SmBCO sample in the furnace grows slowly for 100 h; after the sample growth is completed, the temperature is rapidly decreased to room temperature in 3 h, and a SmBCO high temperature superconducting bulk material is prepared.

[0052] Step S423, after the sample growth is completed, the temperature of the high temperature furnace is decreased to room temperature within 3 h.

[0053] Specifically, during the growth process, the first precursor embryo (CPP layer) on the upper layer of the precursor embryo is composed of RE123 and RE211, and the second precursor embryo (MPP layer) on the lower layer is composed of RE200 and RE023. At high temperature, the RE123 in the CPP layer will undergo non-uniform melting and transform into a combination of micron-sized RE211 solid phase and RE023 liquid phase. Due to the high volume fraction of RE211 particles in the CPP layer, a solid phase skeleton is formed in the liquid phase, while the MPP layer below is mainly composed of RE023 liquid phase, in which RE200 exists in the form of nanoscale size. Therefore, when the precursor embryo is subjected to temperature rise, with the non-uniform melting of RE123, the solid phase skeleton of the CPP layer gradually increases, and the liquid phase of the MPP layer below carries RE200 particles upward for solute penetration and reacts with the liquid phase in the CPP layer to generate extremely fine RE211 particles. Since the oxygen generated in this process is closer to the edge of the bulk material, the oxygen is more likely to escape from the solid melt, and the porosity of the initial REBCO high temperature superconducting bulk material (C-MPP sample) is also reduced. Since RE200 and RE023 generate extremely fine RE211 particles, which form more pinning centers with the RE123 matrix, the superconducting performance of the C-MPP sample is also increased.

[0054] Step S500, obtaining the final REBCO high-temperature superconducting bulk material by heat treatment according to the initial REBCO high-temperature superconducting bulk material.

[0055] Specifically, this step adjusts the content and distribution of oxygen in the superconducting phase through the post-heat treatment of oxygen permeation annealing, optimizes the crystallization state, and improves the superconducting performance of the superconducting bulk material. It should be noted that step S500 includes step S510 and step S520.

[0056] Step S510, grinding and polishing the initial REBCO high-temperature superconducting bulk material to obtain a pretreated bulk material;

[0057] Step S520, placing the pretreated bulk material into a high-temperature furnace with a flowing oxygen atmosphere, and performing oxygen permeation annealing at a temperature of 450°C for 200h to obtain the final REBCO high-temperature superconducting bulk material.

[0058] Further, after obtaining the REBCO high-temperature superconducting bulk material, the application also includes performance testing of the final REBCO high-temperature superconducting bulk material (C-MPP sample). In order to illustrate the superiority of the prepared sample in performance, two bulk materials are prepared under the same conditions using the traditional precursor powder formulation and the refined precursor powder formulation and process, respectively, and are denoted as CPP sample and MPP sample.

[0059] The performance testing method of the REBCO superconducting bulk material covers two key aspects of porosity characterization and magnetic levitation force characterization. First, the porosity characterization is measured and compared by optical observation of the bulk material along the a-c section and the use of image processing software. As shown in FIG. 2, the C-MPP sample shows obvious advantages over the traditional MPP sample, significantly reducing the number of pores and porosity, and improving the mechanical properties and application potential of the superconducting bulk material.

[0060] Second, the magnetic levitation force characterization uses the zero-field cold magnetization method to evaluate the magnetic performance of the superconducting bulk material. This method includes fixing the sample on a permanent magnet track, measuring its levitation force at different heights through liquid nitrogen cooling and specific magnetization process, and the test results are shown in Table 1. According to the force-area density and force-volume density data of different samples, the performance of the C-MPP sample in superconducting performance can be accurately evaluated, which proves that the C-MPP sample effectively improves the force-area / volume density of the sample based on the CPP and is on par with the MPP sample, improving the superconducting performance of the superconducting bulk material while ensuring the mechanical properties.

[0061] Table 1 Force-area density and force-volume density of different samples

[0062] In summary, such comprehensive testing method not only deeply analyzes the structural characteristics and mechanical properties of REBCO superconducting bulk material, but also effectively evaluates its performance in practical application, providing important theoretical support and experimental basis for further optimization and wide application of the technology.

[0063] The typical embodiments of the above detailed process method should be noted that in the preparation process of REBCO superconducting bulk material, those skilled in the art can make many modifications and changes according to the process method without creative labor. Therefore, any technical scheme obtained by logical analysis, reasoning and trying of those skilled in the art on the basis of the existing technology according to the concept of the process method, such as using NdBCO with higher melting point to grow SmBCO and GdBCO high-temperature superconducting bulk material with lower melting point, should be within the protection scope of the patent.

Claims

1. A method for producing high performance REBCO high temperature superconducting bulk material based on layered precursor bodies, characterized in that, The application relates to a method for preparing a REBCO high-temperature superconducting bulk material. The method comprises the following steps: acquiring original medicines with preset molar ratios and preparing original powder combinations by adopting a solid-phase sintering method; preparing a precursor powder combination by mixing the original powder combinations, wherein the precursor powder combination comprises a first precursor powder, a second precursor powder and a buffer layer powder, and the second precursor powder has a smaller proportion of refined particles than the first precursor powder; pressing the precursor powder combination to obtain a combined precursor body and a buffer layer based on a preset embryo preparation method, wherein the combined precursor body comprises a second precursor body arranged at the bottom and a first precursor body coaxially and peripherally arranged above the second precursor body; processing REBCO original seeds, the combined precursor body and the buffer layer based on a preset top seed melting texture method to obtain an initial REBCO high-temperature superconducting bulk material; 2. The method for producing high performance REBCO bulk superconductor from layered precursor bodies according to claim 1, characterized in that performing heat treatment on the initial REBCO high-temperature superconducting bulk material to obtain a final REBCO high-temperature superconducting bulk material. The method for preparing the REBCO high-temperature superconducting bulk material comprises the following steps: taking three kinds of original medicines with molar ratios of RE2O3:BaCO3:CuO=1:4:6, 1:1:1 and 0:2:3; mixing and preparing RE123 original powder, RE211 original powder and RE023 original powder from the three kinds of original medicines respectively; 3. The method for producing high performance REBCO bulk superconductor from layered precursor bodies according to claim 2, characterized in that preparing the RE123 original powder, the RE211 original powder and the RE023 original powder by adopting a solid-phase sintering method to obtain purified RE123 powder, RE211 powder and RE023 powder. The method for preparing the REBCO high-temperature superconducting bulk material comprises the following steps: mixing and processing the RE123 powder and the RE211 powder with a molar ratio of 1:0.35 and adding 1wt% of CeO2 powder to the mixed powder to obtain the first precursor powder; mixing and processing the RE200 powder and the RE023 powder with a molar ratio of 0.72:1 and adding 1wt% of CeO2 powder to the mixed powder to obtain the second precursor powder; 4. The method for fabricating high performance REBCO bulk superconductors from layered precursors according to claim 2, wherein mixing and processing the RE123 powder and the RE211 powder with a molar ratio of 1:0.4 and adding 1wt% of CeO2 powder to the mixed powder to obtain the buffer layer powder. The method for preparing the REBCO high-temperature superconducting bulk material comprises the following steps: sintering the RE123 original powder in an air environment at 920 DEG C for 48 hours, sintering the RE211 original powder in an air environment at 930 DEG C for 48 hours and sintering the RE023 original powder in an air environment at 880 DEG C for 48 hours to obtain sintered RE123 powder blocks, RE211 powder blocks and RE023 powder blocks; The sintered RE123 powder block, the RE211 powder block and the RE023 powder block are ground and sintered repeatedly three times to obtain purified RE123 powder, RE211 powder and RE023 powder.

5. The method for fabricating high performance REBCO bulk superconductors based on layered precursors according to claim 2, characterized in that Based on a preset embryo preparation method, the combined precursor embryo and the buffer layer are obtained by using the precursor powder combination for pressing. 20 g of the first precursor powder is weighed and put into a square mold with a side length of 30 mm for pressure pressing to obtain the first precursor embryo. 20 g of the second precursor powder is weighed and put into a square mold with a side length of 30 mm for pressure pressing to obtain the second precursor embryo. The first precursor embryo is placed coaxially and on the same side above the second precursor embryo to obtain the combined precursor embryo. 0.25 g of the buffer layer powder is weighed and put into a cylindrical mold with a diameter of 6 mm for pressure pressing to obtain the buffer layer.

6. The method for fabricating high performance REBCO bulk high temperature superconductor from layered precursor embryos of claim 2, wherein Based on a preset top seed crystal melting texture method, the REBCO original seed crystal, the combined precursor embryo and the buffer layer are processed to obtain an initial REBCO high-temperature superconducting bulk material, including: The buffer layer is inserted between the REBCO original seed crystal and the combined precursor embryo to obtain a coaxial combined structure, which includes the REBCO original seed crystal, the buffer layer and the combined precursor embryo coaxially from top to bottom. The combined structure is placed on an alumina ceramic plate and placed in a high-temperature furnace for texture growth in an air atmosphere to obtain an initial REBCO high-temperature superconducting bulk material induced by the REBCO original seed crystal.

7. The method for producing high performance REBCO high temperature superconducting bulk material based on layered precursor embryos according to claim 6, characterized in that, The buffer layer is inserted between the REBCO original seed crystal and the combined precursor embryo to obtain a coaxial combined structure, including: One REBCO original seed crystal with a smooth base surface of 3mm×3mm×3mm is selected, and the base surface of the REBCO original seed crystal is polished to obtain a processed REBCO original seed crystal; The central axis of the processed REBCO original seed crystal perpendicular to the ground is corresponded to the central axis of the buffer layer and the central axis of the combined precursor embryo, respectively, and the REBCO original seed crystal is placed between the buffer layer and the combined precursor embryo to obtain a coaxial combined structure.

8. The method for fabricating high performance REBCO high temperature superconducting bulk material based on layered precursor embryos according to claim 6, characterized in that, The combined structure is placed on an alumina ceramic plate and placed in a high-temperature furnace for texture growth in an air atmosphere, including: The temperature in the high-temperature furnace starts from room temperature, rises to 900℃ in 1h, and is kept for 3h, then continues to heat for 1h, and the temperature in the high-temperature furnace rises to 1055℃ and is kept for 1h; The furnace temperature is reduced to 1005℃ within 30 minutes, and then the furnace temperature is reduced at a rate of 0.2K / h to 0.4K / h, so that the REBCO original seed crystal induces the growth of the combined precursor embryo for 100h; After the sample growth is completed, the temperature of the high-temperature furnace is reduced to room temperature within 3h.

9. The method for producing high performance REBCO high temperature superconducting bulk material based on layered precursor embryos according to claim 1, characterized in that, The RE in the REBCO high-temperature superconducting bulk material is selected from Y, Gd, Sm and Nd.

10. The method for producing high performance REBCO high temperature superconducting bulk material based on layered precursor embryos according to claim 1, characterized in that, The initial REBCO high-temperature superconducting bulk material is heat treated to obtain a final REBCO high-temperature superconducting bulk material, further including: The initial REBCO high-temperature superconducting bulk material is subjected to grinding and polishing to obtain a pretreated bulk material; The pretreated bulk material is placed into a high-temperature furnace with a flowing oxygen atmosphere, and subjected to oxygen permeation annealing at a temperature of 450℃ for 200h to obtain a final REBCO high-temperature superconducting bulk material.

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