Innovative process of high-temperature superconducting material

Abstract

The invention relates to the technical field of superconducting materials, in particular to an innovative process of a high-temperature superconducting material. The invention relates to an innovative process of a high-temperature superconducting material, which is characterized by comprising the following specific operation modes: (1) ball milling treatment; (2) gelation reaction; (3) carrying out low-temperature calcination treatment; (4) high-temperature sintering and annealing treatment; and (5) machining and surface treatment. Preferably, the ball-milling treatment in the step (1) comprises the steps of weighing raw materials such as a yttrium source and a copper source, adding an organic solvent and a dispersing agent which are ethanol and polyethylene glycol respectively, and performing ball-milling treatment to obtain a precursor mixture. The high-temperature superconducting material prepared by the innovative process has higher critical current density, critical magnetic field intensity and superconducting transition temperature, and can meet application scenes with higher performance requirements, such as high-power power transmission, high-intensity magnetic field magnetic suspension and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting materials, and in particular to an innovative process for high-temperature superconducting materials. Background Art

[0002] Limitations of the existing high-temperature superconducting material preparation process: Complex process and high cost: The existing high-temperature superconducting material preparation process often requires precise control of multiple parameters such as the ratio of multiple elements, reaction temperature, reaction time, etc. The process is extremely complicated. Taking bismuth-based superconducting materials as an example, its preparation requires the use of a large amount of silver and silver alloys, which not only increases the material cost, but also makes the production process more cumbersome. In addition, in order to obtain high-quality high-temperature superconducting materials, advanced preparation equipment and technology are also required. The high investment cost of these equipment further increases the preparation cost of high-temperature superconducting materials and seriously limits their large-scale commercial application; Insufficient performance stability: The superconducting properties of high-temperature superconducting materials produced in different batches may vary to a certain extent. This difference may be due to factors such as slight changes in the material preparation process and quality fluctuations of raw materials. Moreover, when high-temperature superconducting materials are affected by external factors such as magnetic fields, stress, temperature gradients, etc., their superconducting properties may also change or even disappear. In practical applications, it is difficult to completely avoid the influence of these external factors. Therefore, how to ensure the performance stability and repeatability of high-temperature superconducting materials in complex environments is an urgent problem to be solved; Poor compatibility with existing technologies: The characteristics of high-temperature superconducting materials The properties of high-temperature superconducting materials are very different from those of traditional materials, and there are many difficulties in combining them with existing technologies and equipment. For example, in the field of power transmission, existing power equipment and power grids are designed and constructed based on traditional conductive materials. If high-temperature superconducting materials are used for upgrading and transformation, large-scale adjustment and transformation of existing equipment and power grids are required, which not only requires huge investment, but may also affect the stability and reliability of the power system. In the field of electronic equipment, the special physical properties of high-temperature superconducting materials require matching electronic components and circuit designs. However, current electronic technology is mainly developed based on traditional semiconductor materials, and has poor compatibility with high-temperature superconducting materials, which limits its wide application in electronic equipment. Safety and reliability issues: Under extreme conditions such as high current and high magnetic field, high-temperature superconducting materials may overheat and quench, which will not only affect the normal operation of the equipment, but also may cause safety accidents. For example, in the application of superconducting magnets, if the magnet quenches, the huge energy released instantly may cause serious damage to surrounding equipment and personnel. Therefore, in the application of high-temperature superconducting materials, it is necessary to establish a complete safety monitoring and protection mechanism, and at the same time improve the safety performance and reliability of the materials to ensure their stable operation under various extreme conditions.

[0003] High-temperature superconducting materials have unique properties such as zero resistance effect and complete anti-magnetism, and have great application potential in many fields such as power transmission, magnetic levitation, energy storage, medical equipment, etc. However, the existing high-temperature superconducting material preparation process still has some shortcomings, such as complex preparation process, high cost, superconducting performance needs to be improved, and insufficient material stability, which limits the large-scale commercial application of high-temperature superconducting materials. Therefore, it is necessary to develop a new high-temperature superconducting material preparation process to overcome the defects of the existing technology, improve the performance and preparation efficiency of high-temperature superconducting materials, and reduce costs. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the above-mentioned background technology, and to provide an innovative process for high-temperature superconducting materials, which is characterized by comprising the following steps:

[0005] The specific operation modes are as follows:

[0006] (1) Ball milling;

[0007] (2) Gelation reaction;

[0008] (3) Low temperature calcination treatment;

[0009] (4) High temperature sintering and annealing treatment;

[0010] (5) Machining and surface treatment.

[0011] Preferably, the ball milling treatment in (1) comprises weighing raw materials such as yttrium source and copper source, adding an organic solvent and a dispersant, wherein the organic solvent and the dispersant are ethanol and polyethylene glycol respectively, and after ball milling treatment, a precursor mixture is obtained.

[0012] Preferably, the gelation reaction in (2) comprises subjecting the precursor mixture to a gelation reaction to form a gel-like substance, the gelation reaction temperature is 70° C., the stirring speed is 300 rpm, and the reaction time is 3 hours.

[0013] Preferably, the low-temperature calcination treatment in (3) comprises calcining the gel at a low temperature to obtain a precursor, wherein the low-temperature calcination temperature is 350° C., the heating rate is 8° C. / min, and the holding time is 5 hours.

[0014] Preferably, the (4) medium and high temperature sintering and annealing treatment includes high temperature sintering and annealing the precursor to form a material with superconducting properties, the high temperature sintering temperature is 1000°C, the holding time is 8 hours, the annealing temperature is 700°C, and the annealing time is 30 minutes.

[0015] Preferably, the mechanical processing and surface treatment in (5) includes mechanical processing and surface treatment of the sintered and annealed material to obtain a final high-temperature superconducting material product.

[0016] The beneficial effects of the present invention are:

[0017] Performance improvement: The high-temperature superconducting material prepared by the innovative process of the present invention has higher critical current density, critical magnetic field strength and superconducting transition temperature, and can meet application scenarios with higher performance requirements, such as high-power power transmission, strong magnetic field magnetic levitation, etc.;

[0018] Cost reduction: By optimizing the process, the use of expensive raw materials is reduced, the dependence on high-purity raw materials is reduced, the preparation efficiency is improved, and the production cycle is shortened, thereby effectively reducing the manufacturing cost of high-temperature superconducting materials, which is conducive to their large-scale commercial application;

[0019] Enhanced stability: The precisely controlled preparation process makes the microstructure of the material more uniform and dense, reduces internal defects and impurities, improves the stability and durability of the material, extends its service life, and reduces maintenance costs;

[0020] Using organic and inorganic composite precursors: By introducing organic solvents and dispersants to form organic and inorganic composite precursors, the mixing uniformity and reaction activity of the raw materials are improved, which is conducive to improving the performance uniformity and consistency of superconducting materials;

[0021] Precise control of the gelation process: Precise control of parameters such as the temperature, stirring speed and time of the gelation reaction achieves uniform mixing and orderly arrangement of the precursors at the molecular level, providing a guarantee for the formation of high-quality superconducting phases;

[0022] Combination of low-temperature calcination and high-temperature sintering annealing: The step-by-step treatment of low-temperature calcination and high-temperature sintering annealing not only avoids excessive internal stress and defects in the material caused by direct high-temperature sintering, but also effectively promotes the formation and growth of the superconducting phase, improving the superconducting performance and stability of the material;

[0023] Rapid annealing process: The rapid annealing process is used after high-temperature sintering, which can quickly adjust the microstructure of the material, reduce grain boundary impurities and defects, increase the superconducting current density and critical magnetic field strength, and further optimize the superconducting properties of the material.

[0024] Obviously, according to the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, other various forms of modification, replacement or change may be made.

[0025] The above contents of the present invention are further described in detail below through specific implementation methods in the form of embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following examples. All technologies realized based on the above contents of the present invention belong to the scope of the present invention. DETAILED DESCRIPTION

[0026] The present invention is described below with specific embodiments, but is not intended to be limiting of the present invention.

[0027] An innovative process for high temperature superconducting materials, characterized by comprising the following steps:

[0028] The specific operation modes are as follows:

[0029] (1) Ball milling;

[0030] (2) Gelation reaction;

[0031] (3) Low temperature calcination treatment;

[0032] (4) High temperature sintering and annealing treatment;

[0033] (5) Machining and surface treatment.

[0034] Preferably, the ball milling treatment in (1) comprises weighing raw materials such as yttrium source and copper source, adding an organic solvent and a dispersant, wherein the organic solvent and the dispersant are ethanol and polyethylene glycol respectively, and after ball milling treatment, a precursor mixture is obtained.

[0035] Preferably, the gelation reaction in (2) comprises subjecting the precursor mixture to a gelation reaction to form a gel-like substance, the gelation reaction temperature is 70° C., the stirring speed is 300 rpm, and the reaction time is 3 hours.

[0036] Preferably, the low-temperature calcination treatment in (3) comprises calcining the gel at a low temperature to obtain a precursor, wherein the low-temperature calcination temperature is 350° C., the heating rate is 8° C. / min, and the holding time is 5 hours.

[0037] Preferably, the (4) medium and high temperature sintering and annealing treatment includes high temperature sintering and annealing the precursor to form a material with superconducting properties, the high temperature sintering temperature is 1000°C, the holding time is 8 hours, the annealing temperature is 700°C, and the annealing time is 30 minutes.

[0038] Preferably, the mechanical processing and surface treatment in (5) includes mechanical processing and surface treatment of the sintered and annealed material to obtain a final high-temperature superconducting material product.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An innovative preparation process for high-temperature superconducting materials, characterized in that: The following steps are involved: The specific operation modes are as follows: (1) Ball milling; (2) Gelation reaction; (3) Low temperature calcination treatment; (4) High temperature sintering and annealing treatment; (5) Machining and surface treatment.

2. The innovative process for high temperature superconducting material according to claim 1, characterized in that: The ball milling treatment in (1) comprises weighing raw materials such as yttrium source and copper source, adding an organic solvent and a dispersant, wherein the organic solvent and the dispersant are ethanol and polyethylene glycol respectively, and after ball milling treatment, a precursor mixture is obtained.

3. The innovative process for high temperature superconducting material according to claim 1, characterized in that: The gelation reaction in (2) includes subjecting the precursor mixture to a gelation reaction to form a gel-like substance. The gelation reaction temperature is 70° C., the stirring speed is 300 rpm, and the reaction time is 3 hours.

4. The innovative process for high temperature superconducting material according to claim 1, characterized in that: The low temperature calcination treatment in (3) includes calcining the gel at a low temperature to obtain a precursor, wherein the low temperature calcination temperature is 350° C., the heating rate is 8° C. / min, and the heat preservation time is 5 hours.

5. The innovative process for high temperature superconducting material according to claim 1, characterized in that: The (4) medium-high temperature sintering and annealing treatment includes high-temperature sintering and annealing the precursor to form a material with superconducting properties, wherein the high-temperature sintering temperature is 1000°C and the holding time is 8 hours, and the annealing temperature is 700°C and the annealing time is 30 minutes.

6. The innovative process for high temperature superconducting material according to claim 1, characterized in that: The mechanical processing and surface treatment in (5) includes mechanical processing and surface treatment of the sintered and annealed material to obtain the final high-temperature superconducting material product.