CN111613383B - High-temperature superconducting tape for improving thermal stability - Google Patents
High-temperature superconducting tape for improving thermal stability Download PDFInfo
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- CN111613383B CN111613383B CN202010550462.6A CN202010550462A CN111613383B CN 111613383 B CN111613383 B CN 111613383B CN 202010550462 A CN202010550462 A CN 202010550462A CN 111613383 B CN111613383 B CN 111613383B
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- superconducting tape
- metal reinforcing
- tape body
- thermal stability
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
- H01B12/06—Films or wires on bases or cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/16—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
The invention discloses a high-temperature superconducting tape for improving thermal stability, which comprises a superconducting tape body and a metal reinforcing layer fixedly arranged on at least one side of the superconducting tape body, wherein: the superconducting tape body sequentially comprises from top to bottom: the copper-based composite material comprises a copper stabilizing layer, a substrate layer, a buffer layer, a transition layer, a superconducting layer, a silver stabilizing layer and a copper stabilizing layer; on at least one of the metal reinforcing layers, the surface of the metal reinforcing layer far away from the superconducting tape body is provided with an uneven surface; the thickness of the metal reinforcing layer is 20-200 μm. The invention can improve the heat dissipation efficiency and the thermal stability of the high-temperature superconducting tape.
Description
Technical Field
The invention belongs to the technical field of high-temperature superconduction, and particularly relates to a high-temperature superconducting strip for improving thermal stability.
Background
The high-temperature superconducting tape has the characteristics of zero resistance, low loss, high current-carrying density, complete diamagnetism and other electromagnetic characteristics, and has wide prospects in electric power application. The second generation high temperature superconducting tape is a multilayer composite structure, generally consists of a superconducting layer, a substrate layer, a transition layer, a stabilizing layer and the like, and in some applications, also has a reinforcing layer. For example, in cable applications, a copper reinforcement is typically selected to improve shock resistance, and in current limiter applications, a stainless steel reinforcement is selected to improve resistance for current limiting.
When a fault occurs in a cable application, the fault current can reach 10-30 times of rated current, if the fault cannot be timely removed, the fault current lasts for 0.2-3s, a large amount of heat is generated in the impact process, if the heat is accumulated, the heat cannot be timely dissipated, and the large amount of heat and the raised temperature can damage the superconducting tape or directly burn the tape. The superconducting tape with the reinforcing layer can be used for improving the problem, but the existing tape reinforcing layer is a smooth surface, when the reinforcing layer is thin, the effect of improving the thermal stability cannot be effectively achieved, the heat dissipation efficiency is low, the temperature is easily increased due to the impact of long-time large current, a large amount of heat is accumulated to cause damage, and when the reinforcing layer is thick, the mechanical property of the superconducting tape is influenced, and the advantage of small volume is reduced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-temperature superconducting tape with improved thermal stability, which can improve the heat dissipation efficiency and the thermal stability of the high-temperature superconducting tape.
In order to solve the above technical problems, an aspect of the present invention provides a high temperature superconducting tape with improved thermal stability, which includes a superconducting tape body, and a metal reinforcing layer fixedly disposed on at least one side of the superconducting tape body, wherein:
the superconducting tape body sequentially comprises from top to bottom: the copper-based composite material comprises a copper stabilizing layer, a substrate layer, a buffer layer, a transition layer, a superconducting layer, a silver stabilizing layer and a copper stabilizing layer;
on at least one of the metal reinforcing layers, the surface of the metal reinforcing layer far away from the superconducting tape body is provided with an uneven surface; the thickness of the metal reinforcing layer is 20-200 μm.
Preferably, the two metal reinforcing layers are both provided with uneven surfaces; or one of the metal reinforcing layers is provided with an uneven surface, and one surface of the other metal reinforcing layer, which is far away from the superconducting tape body, is a smooth surface.
Preferably, the uneven surface on the metal reinforcing layer at least comprises one of a net structure, concave-convex squares, transverse/vertical grooves, honeycombs, screw threads, knurling patterns or concave-convex protrusions, and the height difference of the uneven surface is 2-10 μm.
Preferably, the metal reinforcing layer is made of red copper, stainless steel or brass, and the uneven surface of the metal reinforcing layer is formed by etching, laser engraving or stamping.
Preferably, the superconducting tape body and the metal reinforcing layer are fixed in parallel by a welding or crimping method.
Preferably, the superconducting tape is a second-generation high-temperature superconducting tape; in the superconducting tape body, the substrate layer is a textured structure formed by alloy materials or stainless steel, and the thickness of the textured structure is 30-70 mu m; the buffer layer is an oxide layer with a thickness of 200-400 nm; the transition layer is mostly an oxide layer with stable chemical property; the thickness of the copper stabilizing layer and the silver stabilizing layer is between 2 and 10 mu m.
Compared with the prior art, the invention has the following beneficial effects:
the embodiment of the invention provides a high-temperature superconducting tape with improved thermal stability, which is characterized in that metal reinforcing layers are arranged on two sides of a superconducting tape body, and one surface of at least one metal reinforcing layer, which is far away from the superconducting tape body, is provided with an uneven surface. On one hand, the metal reinforcing layer is made of metal materials, so that shunting can be ensured during high-current impact; on the other hand, the surface of the metal reinforcing layer is provided with the uneven surface, so that the heat exchange area can be increased, and the heat exchange efficiency can be improved due to the increase of the area according to a heat conduction formula; with the improvement of the heat exchange efficiency, the temperature rise amplitude of the superconducting tape body can be reduced, so that the thermal stability of the superconducting tape is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a schematic structural view showing an embodiment of a high temperature superconducting tape having improved thermal stability according to the present invention;
FIG. 2 is a schematic view of the construction of one embodiment of the metal reinforcement layer of FIG. 1;
FIG. 3 is a schematic view of the structure of the rugged surface in another embodiment of the metal reinforcing ply of FIG. 1;
FIG. 4 is a schematic view of a partial layered structure of an embodiment of the superconducting tape body of FIG. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, there is shown a schematic structural view of a high temperature superconducting tape with improved thermal stability according to the present invention. As shown in fig. 2 to 4. The superconducting tape comprises a superconducting tape body 2 and a metal reinforcing layer 1 fixedly arranged on at least one side of the superconducting tape body 2, wherein:
the superconducting tape body 2 sequentially comprises from top to bottom: a copper stabilization layer 20, a base layer 21, a buffer layer 22, a transition layer 23, a superconducting layer 24, a silver stabilization layer 25, and a copper stabilization layer 20;
on at least one of the metal reinforcing layers 1, the surface thereof far away from the superconducting tape body 2 is provided with an uneven surface; the thickness of the metal reinforcing layer 1 is 20-200 μm.
In some embodiments, the metal reinforcing layer 1 is disposed on one side of the superconducting tape body 2;
in other embodiments, the metal reinforcing layers 1 are arranged on both sides of the superconducting tape body 2; uneven surfaces are arranged on the two metal reinforcing layers 1; or one of the metal reinforcing layers 1 is provided with an uneven surface, and the surface of the other metal reinforcing layer 1 far away from the superconducting tape body 2 is a smooth surface (namely a metal sheet).
More specifically, the uneven surface on the metal reinforcing layer at least comprises one of a net structure, an uneven square, a transverse/vertical groove, a honeycomb shape, a thread line, a knurling pattern or a pit bulge, and the height difference of the uneven surface is 2-10 μm. As shown in fig. 2, in which a square-shaped dimple 10 and a square-shaped protrusion 11 are shown; as shown in fig. 3, a groove 12 and a block-shaped protrusion 11 are shown.
In some examples, the metal reinforcement layer 1 is made of red copper, stainless steel or brass, and its rugged surface is formed by etching, laser engraving or punching process.
In some examples, the superconducting tape body 2 and the metal reinforcing layer 1 are fixed in parallel by a welding or crimping method.
More specifically, in the superconducting tape body 2:
the base layer 21 is a textured structure formed by an alloy material (such as Ni or Ni alloy) or stainless steel. The base layer serves as a support for the superconducting layer and has a thickness of about 30 to 70 μm.
The buffer layer 22 is an oxide, such as Y2O3, Al2O3, Gd2O3, MgO, SrTiO3, CeO2, etc., and has a thickness of about 200-400 nm. The buffer layer prevents atoms between the substrate and the atoms of the superconducting layer from inter-diffusing, reduces the coefficients of thermal expansion and cold contraction of the substrate and the superconducting layer, prevents the substrate and the superconducting layer from generating chemical reaction at high temperature, and reduces the lattice mismatch degree of the substrate and the superconducting layer.
The transition layer 23 is mostly chemically stable oxide, and mainly functions to prevent diffusion of elements between the base layer 21 and the superconducting layer 24 and also functions to transfer texture.
The superconducting layer 24 can adopt a second generation high-temperature superconducting tape (such as a YBCO coating conductor);
the copper stabilizing layer 20 and the silver stabilizing layer 25 play a role in protection and support, the silver stabilizing layer 25 covers the outer side of the superconducting layer 24, the copper stabilizing layer 20 covers the silver stabilizing layer 25 and the outer side of the substrate layer 21, and the thickness of each layer can be 2-10 μm.
Compared with the prior art, the invention has the following beneficial effects:
the embodiment of the invention provides a high-temperature superconducting tape with improved thermal stability, which is characterized in that metal reinforcing layers are arranged on two sides of a superconducting tape body, and one surface of at least one metal reinforcing layer, which is far away from the superconducting tape body, is provided with an uneven surface. On one hand, the metal reinforcing layer is made of metal materials, so that shunting can be ensured during high-current impact; on the other hand, the surface of the metal reinforcing layer is provided with the uneven surface, so that the heat exchange area can be increased, and the heat exchange efficiency can be improved due to the increase of the area according to a heat conduction formula; with the improvement of the heat exchange efficiency, the temperature rise amplitude of the superconducting tape body can be reduced, so that the thermal stability of the superconducting tape is further improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A high-temperature superconducting tape for improving thermal stability, which comprises a superconducting tape body and a metal reinforcing layer fixedly arranged on at least one side of the superconducting tape body, wherein:
the superconducting tape body sequentially comprises from top to bottom: the copper-based composite material comprises a copper stabilizing layer, a substrate layer, a buffer layer, a transition layer, a superconducting layer, a silver stabilizing layer and a copper stabilizing layer;
on at least one of the metal reinforcing layers, the surface of the metal reinforcing layer far away from the superconducting tape body is provided with an uneven surface; the thickness of the metal reinforcing layer is 20-200 μm;
the two metal reinforcing layers are provided with uneven surfaces; or one of the metal reinforcing layers is provided with an uneven surface, and one surface of the other metal reinforcing layer, which is far away from the superconducting tape body, is a smooth surface;
the metal reinforcing layer is made of red copper, stainless steel or brass materials, and the uneven surface of the metal reinforcing layer is formed by etching, laser engraving or stamping.
2. A high temperature superconducting tape having improved thermal stability according to claim 1, wherein the uneven surface of the metal reinforcing layer comprises at least one of a net structure, a grid, a cross/vertical groove, a honeycomb, a thread, a knurl pattern, or a dimple protrusion, and the height difference of the uneven surface is 2 to 10 μm.
3. A high temperature superconducting tape having improved thermal stability according to claim 2, wherein the superconducting tape body and the metal reinforcing layer are fixed in parallel by welding or crimping.
4. A high-temperature superconducting tape having improved thermal stability according to any one of claims 1 to 3, wherein the superconducting tape is a second-generation high-temperature superconducting tape; in the superconducting tape body, the substrate layer is a textured structure formed by alloy materials or stainless steel, and the thickness of the textured structure is 30-70 mu m; the buffer layer is an oxide layer with a thickness of 200-400 nm; the transition layer is mostly an oxide layer with stable chemical property; the thickness of the copper stabilizing layer and the silver stabilizing layer is between 2 and 10 mu m.
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| CN202010550462.6A CN111613383B (en) | 2020-06-16 | 2020-06-16 | High-temperature superconducting tape for improving thermal stability |
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| CN202010550462.6A CN111613383B (en) | 2020-06-16 | 2020-06-16 | High-temperature superconducting tape for improving thermal stability |
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| CN111613383A CN111613383A (en) | 2020-09-01 |
| CN111613383B true CN111613383B (en) | 2021-12-21 |
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| CN115171973B (en) * | 2022-06-30 | 2023-03-03 | 上海超导科技股份有限公司 | Copper-silver alloy reinforced superconducting tape, reinforcing method and superconducting coil |
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