CN108538491A - A kind of REBCO superconducting tapes and preparation method thereof - Google Patents
A kind of REBCO superconducting tapes and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of REBCO superconducting tapes and preparation method thereof, wherein, REBCO superconducting tapes include central core and are located at the first stabilized zone, the second stabilized zone of central core both sides, central core includes the basal layer, buffer layer and superconducting layer being from bottom to top arranged, first stabilized zone and the second stabilized zone get up central core cladding, first stabilized zone is located at close to the side of superconducting layer, and the second stabilized zone is located at close to the side of basal layer, and the resistance of the first stabilized zone is less than the resistance of the second stabilized zone.The REBCO superconducting tapes of the present invention can solve the contradiction between total current-limiting resistance and impact resistance current capability.
Description
Technical field
The invention belongs to high-temperature superconductor band fields, and in particular to a kind of REBCO superconducting tapes and preparation method thereof.
Background technology
By the high temperature superconducting materia for the second generation that rare earth (Re), barium (Ba), copper (Cu), oxygen (O) element form, system is written as
REBCO can be used at higher temperature and magnetic field, be had a clear superiority in performance.REBCO superconducting tapes are close at present
The high-temperature superconductor band for the great application prospect that year grows up, typical structure include two symmetrically arranged stabilized zones and folder
The central core being located between stabilized zone, and central core generally comprises basal layer, buffer layer and superconducting layer.REBCO superconductive tapes simultaneously
Material is increasingly used in superconducting power apparatus, in high tc superconducting fault current limiter, hyperconductive cable, superconducting energy storage, is surpassed
The fields such as transformer, superconducting motor and superconducting heater are led to have broad application prospects.
Wherein, high tc superconducting fault current limiter is divided into resistor-type, reactance type, saturable core type, bridge circuit type and magnetic screen type etc..Mesh
Before the mainly resistive superconducting current limiter that is widely studied, this superconductive current limiter integrates detection, triggering and current limliting,
Reaction speed is fast, and when normal operation is lost low, can automatically reset, overcome the shortcomings that conventional fuse is used only once.Together
When the electric current of circuit is more than the critical current of superconductor, superconductor is changed into normal conductor, to sealing in rapidly in the line
One impedance, at this moment short circuit current will effectively be limited, greatly improve the stability of existing power grid, and improve power supply
Reliability and safety, reduce power grid cost.
High tc superconducting fault current limiter is generally required with REBCO superconducting tapes and is required with following two：(1) require REBCO super
Conduction band material has larger total current-limiting resistance (design for depending on current limiter), REBCO superconducting tapes central core when due to quenching
It is non-conductive, therefore current-limiting resistance is determined by the resistance of the stabilized zone of central core both sides, the resistance of both sides stabilized zone is bigger, i.e., total limit
Leakage resistance is bigger.Therefore generally require the stabilized zone of the central core both sides of superconducting tape that all there is larger resistance value.(2) it requires
REBCO superconducting tapes have higher impact resistance current capability, the reason is that, when the moment of line failure (such as short circuit)
(in a few tens of milliseconds), electric current are more than critical current, and superconducting layer can quench rapidly and become high-impedance state, and the resistance of superconducting layer connects at this time
Close infinitely great, then the electric current in circuit will reach several kilo-amperes within a few tens of milliseconds that short circuit occurs.That is, so-called resistance to
Dash current performance is mainly reflected in the performance that heavy current impact is born in a few tens of milliseconds that short circuit occurs.Due to total current limliting electricity
Resistance is bigger, will produce more Joule heats, be easy to cause the failure of superconducting tape leafing, make the structural stability of superconducting tape by
It destroys, and then impact resistance current capability can be reduced.Therefore it in order to obtain higher impact resistance current capability, and needs to reduce and stablize
The resistance value of layer.
Therefore, when superconducting tape being applied in high tc superconducting fault current limiter, there are what above-mentioned 2 points requirement was unable to have both at one and the same time to ask
Topic determines that its impact resistance current capability is difficult to meet practical application need to the possessed larger current-limiting resistance of superconducting tape
It asks.So how to solve above-mentioned contradiction becomes the hot spot studied at present.
Invention content
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention, which provides one kind, can solve total current-limiting resistance and impact resistance electricity
Contradictory REBCO superconducting tapes and preparation method between fluidity energy.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include：
One aspect of the present invention provides a kind of REBCO superconducting tapes, including central core and is located at the first steady of central core both sides
Given layer, the second stabilized zone, central core include the basal layer, buffer layer and superconducting layer being from bottom to top arranged, the first stabilized zone and
Two stabilized zones get up central core cladding, and the first stabilized zone is located at close to the side of superconducting layer, and the second stabilized zone is located at close to base
The side of bottom, and the resistance of the first stabilized zone is less than the resistance of the second stabilized zone.
According to the present invention, the material identical of the first stabilized zone and the second stabilized zone, and the thickness of the first stabilized zone are more than the
The thickness of two stabilized zones.
According to the present invention, total current-limiting resistance of REBCO superconducting tapes and the thickness of the first stabilized zone and the second stabilized zone
The relationship of thickness is：R=A/ (d1+d2)+B wherein, R indicates total current-limiting resistance, d1Indicate the thickness of the first stabilized zone, d2It indicates
The thickness of second stabilized zone, A, B are constant.
According to the present invention, the thickness of the thickness of the first stabilized zone 2 and the second stabilized zone 3 is identical, and the material of the first stabilized zone
The resistivity of material is less than the resistivity of the material of the second stabilized zone.
According to the present invention, the thickness of the thickness of the first stabilized zone and the second stabilized zone is different, and the material of the first stabilized zone
Resistivity and the resistivity of material of the second stabilized zone also differ.
According to the present invention, total current-limiting resistance of REBCO superconducting tapes and the thickness of the first stabilized zone, resistivity and second are steady
The thickness of given layer, the relationship of resistivity are：Wherein, R indicates total current-limiting resistance, d1、ρ1Respectively
Indicate the thickness and resistivity of the first stabilized zone, d2、ρ2Indicate that the thickness and resistivity of the second stabilized zone, C, D are constant respectively.
According to the present invention, the material of the first stabilized zone and the second stabilized zone is copper, aluminium, stainless steel or constantan.
Another aspect of the present invention provides a kind of preparation method of above-mentioned REBCO superconducting tapes, includes the following steps：S1, system
Standby central core；S2, the first stabilized zone is placed on superconducting layer, the second stabilized zone is placed on to the bottom surface of basal layer, recycled
First stabilized zone and superconducting layer and the second stabilized zone and basal layer are welded as a whole by soldering, obtain REBCO superconducting tapes.
According to the present invention, in step s 2, it is equipped on the surface of the first stabilized zone and the second stabilized zone close to central core
Adhesive layer, the welding performance for improving the first stabilized zone and the second stabilized zone.
According to the present invention, adhesive layer is layers of copper or silver layer；The thickness of adhesive layer is 0~3 μm
(3) advantageous effect
The beneficial effects of the invention are as follows：
REBCO superconducting tapes in the present invention, which breach, is in the prior art arranged to the first stabilized zone and the second stabilized zone
The idea of symmetrical structure, and it is set to the different dissymmetrical structure of resistance, while so that the resistance of the first stabilized zone is reduced
The resistance of the second stabilized zone is set to increase, to while promoting impact resistance current capability, ensure that total current-limiting resistance does not decline.
Solves the contradiction between above-mentioned total current-limiting resistance and impact resistance current capability as a result, in the identical condition of total current-limiting resistance
Under, the superconducting tape in the present invention has higher impact resistance current capability.The preparation method of REBCO superconducting tapes in the present invention
Easy to operate, manufactured REBCO superconducting tapes have above-mentioned same effect.
Description of the drawings
Fig. 1 is the structural schematic diagram for the REBCO superconducting tapes that following examples 1 provide.
【Reference sign】
1：Central core；11：Basal layer；12：Buffer layer；13：Superconducting layer；2：First stabilized zone；3：Second stabilized zone.
Specific implementation mode
In order to preferably explain the present invention, in order to understand, below in conjunction with the accompanying drawings, by specific implementation mode, to this hair
It is bright to be described in detail.
Embodiment 1
Referring to Fig.1, the present embodiment provides a kind of REBCO superconducting tapes (hereinafter referred to as superconducting tape), including 1 He of central core
It is located at the first stabilized zone 2, the second stabilized zone 3 of 1 both sides of central core, central core 1 includes the basal layer 11 being from bottom to top arranged, delays
Layer 12 and superconducting layer 13 are rushed, the width of central core 1 is less than the width of the first stabilized zone 2 and the second stabilized zone 3, the first stabilized zone 2
The cladding of central core 1 is got up with the second stabilized zone 3.First stabilized zone 2 is located at close to the side of superconducting layer 13, the second stabilized zone 3
It is located at close to the side of basal layer 11, and the resistance of the first stabilized zone 2 is less than the resistance of the second stabilized zone 3.
Wherein, basal layer 11 is the supporter of entire superconducting tape, and the effect of buffer layer 12 is for the extension of superconducting layer 13
Growth provides texture, and superconducting layer 13 is the carrier of electric current, and the effect of the first stabilized zone 2 and the second stabilized zone 3 is protection superconduction
Layer 13.And for high tc superconducting fault current limiter superconducting tape, since superconducting tape is as main flow-restrictive material, superconductive tape
The impact resistance current capability of material is the important indicator of flow restrictor design.
It is found in research, electric current is transferred to stabilized zone from central core 1 within a few tens of milliseconds that short circuit occurs, and can firstly flow through
Close to the first stabilized zone 2 of superconducting layer 13, so impact resistance current capability of the resistance of the first stabilized zone 2 to entire superconducting tape
It is most important.That is, impact resistance current capability is mainly by the stabilized zone close to 13 side of superconducting layer in REBCO superconducting tapes
The resistance decision of (i.e. the first stabilized zone 2), the sensitivity with the stabilized zone (i.e. the second stabilized zone 3) close to 11 side of basal layer
Less, the resistance of the stabilized zone and close to 13 side of superconducting layer is smaller, and impact resistance current capability is high.And for existing superconductive tape
Material, the material and thickness of 2 and second stabilized zone 3 of usual first stabilized zone are just the same, i.e. the resistance of the two is the same.Also
It is to say, when ensureing larger total current-limiting resistance, the resistance close to the stabilized zone of 13 side of superconducting layer is also bigger, resistance to make
Dash current performance is restricted.
Based on above-mentioned discovery, in order to obtain higher impact resistance current capability while ensure big total current-limiting resistance, this reality
It applies the superconducting tape in example and breaches the existing middle idea that first stabilized zone 2 and the second stabilized zone 3 are arranged to symmetrical structure, and
It is set to the different dissymmetrical structure of resistance, the electricity of the second stabilized zone 3 is made while so that the resistance of the first stabilized zone 2 is reduced
Resistance increases, to while promoting impact resistance current capability, ensure that total current-limiting resistance does not decline.It solves as a result, above-mentioned
Total current-limiting resistance and impact resistance current capability between contradiction, total current-limiting resistance under the same conditions, in the present embodiment
Superconducting tape has higher impact resistance current capability.
Further, the resistance and the second stabilized zone 3 of total current-limiting resistance of REBCO superconducting tapes and the first stabilized zone 2
Relationship between resistance is：
Wherein, R indicates total current-limiting resistance, R1Indicate the resistance of the first stabilized zone 2, R2Indicate the resistance of the second stabilized zone 3, E
For constant.After determining total current-limiting resistance according to design scheme, the first stabilized zone 2 and the second stabilized zone can be determined by above-mentioned formula
3 resistance.
Further, the resistance that the resistance of the first stabilized zone 2 is less than the second stabilized zone 3 includes mainly following several situations：
The first situation：The material identical of first stabilized zone 2 and the second stabilized zone 3, and the thickness of the first stabilized zone 2 is more than
The thickness of second stabilized zone 3.
At this point, the thickness of the thickness and the second stabilized zone 3 of total current-limiting resistance of REBCO superconducting tapes and the first stabilized zone 2
Relationship be：
R=A/ (d1+d2)+B
Wherein, R indicates total current-limiting resistance, d1Indicate the thickness of the first stabilized zone 2, d2Indicate the thickness of the second stabilized zone 3,
A, B is constant.Total current-limiting resistance is solely dependent upon the overall thickness of the first stabilized zone 2 and the second stabilized zone 3 at this time.According to design scheme
After determining total current-limiting resistance, so that it may to obtain the overall thickness of the first stabilized zone 2 and the second stabilized zone 3 by above-mentioned formula, at this moment again
The thickness of first stabilized zone 2 and the second stabilized zone 3 is optimized, so as to optimize the resistance of the first stabilized zone 2, Jin Ergai
The impact resistance current capability of kind superconducting tape.It should be noted that the extreme case of such case is exactly the thickness of the second stabilized zone 3
Degree is zero, can obtain maximum impact resistance electric current at this time, but this extreme case can influence the mechanical performance of superconducting tape, one
As be worthless.
The second situation：The thickness of the thickness of first stabilized zone 2 and the second stabilized zone 3 is identical, and the material of the first stabilized zone 2
The resistivity of material is less than the resistivity of the material of the second stabilized zone 3.
At this point, the thickness of total current-limiting resistance of REBCO superconducting tapes and the first stabilized zone 2, resistivity and the second stabilized zone 3
Thickness, resistivity relationship be：
Wherein, R indicates total current-limiting resistance, d1、ρ1The thickness and resistivity of the first stabilized zone 2, d are indicated respectively2、ρ2Respectively
Indicate that the thickness and resistivity of the second stabilized zone 3, C, D are constant.Total current-limiting resistance is solely dependent upon the first stabilized zone 2 and at this time
After determining total current-limiting resistance according to design scheme, which kind of material of optimum choice and thickness can be continued for the resistivity of two stabilized zones 3
The selection of degree, and then improve the impact resistance current capability of superconducting tape.
The third situation：The thickness of the thickness of first stabilized zone 2 and the second stabilized zone 3 differs, while the first stabilized zone 2
The resistivity of material and the resistivity of material of the second stabilized zone 3 also differ, but the resistance of final first stabilized zone 2 is less than
The resistance of second stabilized zone 3.At this point, same the second situation of calculation formula of total current-limiting resistance, can determine according to design scheme
After total current-limiting resistance, the thickness and resistivity that consider the first stabilized zone 2 and the second stabilized zone 3 optimize, and then improve
The impact resistance current capability of superconducting tape.Three cases above is selected according to actual needs in actual design.
Further, the material of the first stabilized zone 2 and the second stabilized zone 3 is copper, aluminium, stainless steel, constantan or other gold
Category and alloy material, select according to actual needs.Wherein, the resistivity of copper, aluminium, constantan and stainless steel is sequentially increased.
The present embodiment also provides the preparation method of above-mentioned REBCO superconducting tapes, specifically comprises the following steps：
S1, central core 1 is prepared, the preparation method of central core 1 is identical as the preparation method of existing central core 1, herein not
It repeats again.In addition, central core 1 can also include the silver layer for being located at 13 top of superconducting layer, preferably to protect superconducting layer 13.Also may be used
It, can also be according to need between basal layer 11, buffer layer 12 and superconducting layer 13 silver layer is arranged in the lower section of basal layer 11 simultaneously
Other coating is set again, depending on actual conditions.
S2, the first stabilized zone 2 is placed on superconducting layer 13, the second stabilized zone 3 is placed on to the bottom surface of basal layer 11, then
The first stabilized zone 2 and superconducting layer 13 and the second stabilized zone 3 and basal layer 11 are welded as a whole using soldering, obtain superconduction
Band.Wherein, be welded as a whole specifically include by between the first stabilized zone 2 and superconducting layer 13, the first stabilized zone 2 and superconducting layer 13
Edge, between the second stabilized zone 3 and basal layer 11,2 and of edge and the first stabilized zone of the second stabilized zone 3 and basal layer 11
It is all made of soldering and welding together between second stabilized zone 3.
Further, before carrying out soldering, the first stabilized zone 2 and the second stabilized zone 3 close to the surface of central core 1 also
Fluxing agent is coated, to enhance binding force.Scaling powder here on the one hand can be with the first stabilized zone 2 and the second stabilized zone simultaneously
3 surface chemically reacts, to remove the oxide layer on its surface.On the other hand it is steady can to improve the first stabilized zone 2 and second
Wettability of the surface when given layer 3 is contacted with superconducting layer 13 and basal layer 11 respectively, so make the first stabilized zone 2 and superconducting layer 13,
Binding force between second stabilized zone 3 and basal layer 11 is stronger.
Further, it is equipped with adhesive layer close to the surface of central core 1 in the first stabilized zone 2 and the second stabilized zone 3, for carrying
The welding performance of 2 and second stabilized zone 3 of high first stabilized zone.It should be noted that in the preparation, first in 2 He of the first stabilized zone
The surface of second stabilized zone 3 forms adhesive layer, and soldering is carried out again after being then coated with scaling powder.Because of the first stabilized zone 2, second
When being welded using soldering between stabilized zone 3 and central core 1, had to when using different stabilization layer materials consider material with
The solderability and binding force intensity of tin solder, to ensure that the mechanical performance of superconducting tape reaches requirement.Therefore, it is equipped with and bonds
Layer can improve the welding performance of the first stabilized zone 2 and the second stabilized zone 3, and such method is steady for almost all of first
The material of given layer 2 and the second stabilized zone 3 is applicable in, and can meet the requirement of welding performance.
Further, adhesive layer is layers of copper either silver layer or can have preferable welding using other with tin solder
The material of property is formed.Adhesive layer is more preferably layers of copper, since copper is cheap compared to silver or other materials, uses layers of copper can be with
Reduce cost.Generally the modes such as plating or Vacuum Deposition, which may be used, forms adhesive layer.
It should be noted that when the first stabilized zone 2 and/or the second stabilized zone 3 material of itself have preferable weldability,
When can have stronger binding force with tin solder, such as when the material of the first stabilized zone 2 and/or the second stabilized zone 3 is copper
When, then do not have to carry out copper facing again.Mainly due to generally using tin between the first stabilized zone 2, the second stabilized zone 3 and central core 1
Weldering, and it is strong in the tin solder (such as tin-lead solder) and copper weldability used when soldering, and with stainless steel etc. other
The weldability of material is relatively poor, therefore when the other materials such as the first stabilized zone 2 and the second stabilized zone 3 use stainless steel, if
Not copper facing and directly carry out soldering, then weldability is poor, insufficient strength of binding force, and the mechanical performance of superconducting tape can not expire
Foot requires.And copper and tin parent metal weldability is strong, as a result, the copper coating of the first stabilized zone 2 and the second stabilized zone 3 (i.e.
Equipped with adhesive layer) after, the weldability of the first stabilized zone 2 and the second stabilized zone 3 and tin solder can be enhanced, and then make superconduction
The mechanical performance of band reaches requirement.
Because when being welded using soldering between the first stabilized zone 2, the second stabilized zone 3 and central core 1, using different
The solderability and binding force intensity for having to consider material and tin solder when stablizing layer material, to ensure the machine of superconducting tape
Tool performance reaches requirement.And in the present embodiment, it is equipped with and glues close to the side of central core 1 in the first stabilized zone 2 and the second stabilized zone 3
Layer is tied, the welding performance for improving the first stabilized zone 2 and the second stabilized zone 3 can be enhanced in this way.It is such after being equipped with adhesive layer simultaneously
Method is applicable in the material of 2 and second stabilized zone 3 of almost all of first stabilized zone, can meet wanting for welding performance
It asks.
Further, the thickness of adhesive layer is 0~3 μm.Due to being the relationship of parallel connection between each layer of entire superconducting tape,
If the thickness of adhesive layer is larger, total current-limiting resistance can be made to reduce, influence the metering function of superconducting tape.Therefore it usually bonds
The thickness of layer should control the weldability that can improve at 0~3 μm between the first stabilized zone 2 and the second stabilized zone 3 and tin solder
Can, while total current-limiting resistance is influenced smaller.
Embodiment 2
The present embodiment is mainly with the thickness of specific total current-limiting resistance and the first stabilized zone 2 and the second stabilized zone 3 of selection
For degree and material, the impact resistance current capability of superconducting tape is tested, the structure and preparation method of superconducting tape are the same as real
Example 1 is applied, details are not described herein.It is specific as follows：
Total current-limiting resistance of superconducting tape is 0.11 Ω/m, the material of the first stabilized zone 2 and the second stabilized zone 3 in the present embodiment
Material is stainless steel, and the thickness of the first stabilized zone 2 is 120 μm, and the thickness of the second stabilized zone 3 is 80 μm.Simultaneously in contrast
In the superconducting tape of existing symmetrical structure, the material of the first stabilized zone 2 and the second stabilized zone 3 is stainless steel, and thickness is
100μm.Then impact resistance Current experiments are carried out respectively to above two superconducting tape, the impact resistance electric current of the superconducting tape measured
Performance data such as the following table 1：
The impact resistance current capability data of 1. superconducting tape of table
Existing superconducting tape dash current 1020A when the attack time is 100ms as can be seen from Table 1, and this reality
It is 1488A to apply the dash current when the attack time is 100ms of the superconducting tape in example, than the dash current of existing superconducting tape
Improve 46%.As a result, it can also be seen that the superconducting tape in the present embodiment is compared with existing superconducting tape, in total current limliting
Under the same conditions, the superconducting tape in the present embodiment has higher impact resistance current capability to resistance, i.e., in impact resistance electric current
There is apparent advantage in terms of improvement.If in actual design, according to actual needs to the first stabilized zone 2 and the second stabilized zone 3
Material and thickness carry out the optimization design of system again, this advantage will be more significant.
Embodiment 3
The present embodiment is mainly with the thickness of specific total current-limiting resistance and the first stabilized zone 2 and the second stabilized zone 3 of selection
For degree and material, the impact resistance current capability of superconducting tape is tested, the structure and preparation method of superconducting tape are the same as real
Example 1 is applied, details are not described herein.It is specific as follows：
Total current-limiting resistance of superconducting tape is 0.11 Ω/m in the present embodiment, and the material of the first stabilized zone 2 is constantan, room
Warm resistivity is 50 × 10-8The material of Ω m, the second stabilized zone 3 are stainless steel, and room temperature resistivity is 70 × 10-8Ω m,
The thickness of first stabilized zone 2 and the second stabilized zone 3 is 85 μm.The superconducting tape of existing symmetrical structure in contrast simultaneously
In, the material of the first stabilized zone 2 and the second stabilized zone 3 is stainless steel, and thickness is 100 μm.Then to above two superconduction
Band carries out impact resistance Current experiments respectively, impact resistance current capability data such as the following table 2 of the superconducting tape measured：
The impact resistance current capability data of 2. superconducting tape of table
Existing superconducting tape dash current 1020A when the attack time is 100ms as can be seen from Table 1, and this reality
It is 1420A to apply the dash current when the attack time is 100ms of the superconducting tape in example, than the dash current of existing superconducting tape
Improve 39%.As a result, it can also be seen that the superconducting tape in the present embodiment is compared with existing superconducting tape, in total current limliting
Under the same conditions, the superconducting tape in the present embodiment has higher impact resistance current capability to resistance, i.e., in impact resistance electric current
There is apparent advantage in terms of improvement.
Embodiment 4
The present embodiment is mainly with the thickness of specific total current-limiting resistance and the first stabilized zone 2 and the second stabilized zone 3 of selection
For degree and material, the impact resistance current capability of superconducting tape is tested, the structure and preparation method of superconducting tape are the same as real
Example 1 is applied, details are not described herein.It is specific as follows：
Total current-limiting resistance of superconducting tape is 0.11 Ω/m in the present embodiment, and the material of the first stabilized zone 2 is constantan, second
The material of stabilized zone 3 is stainless steel, and the thickness of the first stabilized zone 2 is 110 μm, and the thickness of the second stabilized zone 3 is 50 μm.While with
Comparison existing symmetrical structure superconducting tape in, the material of the first stabilized zone 2 and the second stabilized zone 3 is stainless steel,
Thickness is 100 μm.Then impact resistance Current experiments are carried out respectively to above two superconducting tape, the superconducting tape measured it is resistance to
Dash current performance data such as the following table 1：
The impact resistance current capability data of 3. superconducting tape of table
Existing superconducting tape dash current 1020A when the attack time is 100ms as can be seen from Table 1, and this reality
It is 1620A to apply the dash current when the attack time is 100ms of the superconducting tape in example, than the dash current of existing superconducting tape
Improve 59%.As a result, it can also be seen that the superconducting tape in the present embodiment is compared with existing superconducting tape, in total current limliting
Under the same conditions, the superconducting tape in the present embodiment has higher impact resistance current capability to resistance, i.e., in impact resistance electric current
There is apparent advantage in terms of improvement.
More than, only it is presently preferred embodiments of the present invention, is not the limitation for doing other forms to invention, it is any to be familiar with
Professional and technical personnel is changed or is modified as the equivalence enforcement of equivalent variations possibly also with the technology contents of the disclosure above
Example.But it is every without departing from technical solution of the present invention content, according to the technical essence of the invention to appointing made by above example
What simple modification, equivalent variations and remodeling, still falls within the protection domain of technical solution of the present invention.
Claims (10)
1. a kind of REBCO superconducting tapes, including central core (1) and be located at the central core (1) both sides the first stabilized zone (2),
Second stabilized zone (3), the central core (1) include the basal layer (11), buffer layer (12) and superconducting layer being from bottom to top arranged
(13), first stabilized zone (2) and second stabilized zone (3) get up the central core (1) cladding, which is characterized in that
First stabilized zone (2) is located at close to the side of the superconducting layer (13), and second stabilized zone (3) is located at close to institute
The side of basal layer (11) is stated, and the resistance of first stabilized zone (2) is less than the resistance of second stabilized zone (3).
2. REBCO superconducting tapes as described in claim 1, which is characterized in that
The material identical of first stabilized zone (2) and second stabilized zone (3), and the thickness of first stabilized zone (2)
More than the thickness of second stabilized zone (3).
3. REBCO superconducting tapes as claimed in claim 2, which is characterized in that
The thickness and second stabilized zone (3) of total current-limiting resistance of the REBCO superconducting tapes and first stabilized zone (2)
The relationship of thickness be：
R=A/ (d1+d2)+B
Wherein, R indicates total current-limiting resistance, d1Indicate the thickness of first stabilized zone (2), d2Indicate second stabilized zone (3)
Thickness, A, B be constant.
4. REBCO superconducting tapes as described in claim 1, which is characterized in that
The thickness of first stabilized zone (2) is identical with the thickness of second stabilized zone (3), and first stabilized zone (2)
Material resistivity be less than second stabilized zone (3) material resistivity.
5. REBCO superconducting tapes as described in claim 1, which is characterized in that
The thickness of first stabilized zone (2) is different with the thickness of second stabilized zone (3), and first stabilized zone (2)
The resistivity of material and the resistivity of material of second stabilized zone (3) also differ.
6. REBCO superconducting tapes as described in claim 4 or 5, which is characterized in that
Total current-limiting resistance of the REBCO superconducting tapes and the thickness of first stabilized zone (2), resistivity and described second are surely
The thickness of given layer (3), the relationship of resistivity are：
Wherein, R indicates total current-limiting resistance, d1、ρ1The thickness and resistivity of first stabilized zone (2), d are indicated respectively2、ρ2Respectively
Indicate that the thickness and resistivity of second stabilized zone (3), C, D are constant.
7. REBCO superconducting tapes as described in claim 1, which is characterized in that
The material of first stabilized zone (2) and second stabilized zone (3) is copper, aluminium, stainless steel or constantan.
8. a kind of preparation method of REBCO superconducting tapes as described in any one of claim 1 to 7, which is characterized in that including such as
Lower step：
S1, the central core (1) is prepared；
S2, first stabilized zone (2) is placed on the superconducting layer (13), second stabilized zone (3) is placed on institute
The bottom surface of basal layer (11) is stated, soldering is recycled to stablize first stabilized zone (2) and superconducting layer (13) and described second
Layer (3) and basal layer (11) are welded as a whole, and obtain the REBCO superconducting tapes.
9. the preparation method of REBCO superconducting tapes as claimed in claim 8, which is characterized in that
In step s 2, it is set on the surface in first stabilized zone (2) and the second stabilized zone (3) close to the central core (1)
There is adhesive layer, the welding performance for improving first stabilized zone (2) and second stabilized zone (3).
10. the preparation method of REBCO superconducting tapes as claimed in claim 9, which is characterized in that
The adhesive layer is layers of copper or silver layer；
The thickness of the adhesive layer is 0~3 μm.
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