CN105390902B - A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor - Google Patents
A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor Download PDFInfo
- Publication number
- CN105390902B CN105390902B CN201510896584.XA CN201510896584A CN105390902B CN 105390902 B CN105390902 B CN 105390902B CN 201510896584 A CN201510896584 A CN 201510896584A CN 105390902 B CN105390902 B CN 105390902B
- Authority
- CN
- China
- Prior art keywords
- powder
- superconducting
- heat treatment
- production method
- oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/021—Soldered or welded connections between two or more cables or wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/68—Connections to or between superconductive connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/22—Connectors or connections adapted for particular applications for transformers or coils
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The invention discloses a kind of superconducting joint production methods for RE, Ba and Cu oxide high temperature super conductive conductor, comprising the following steps: a., which carries out silver layer removal processing to the end of two superconductivity wires, keeps superconducting layer exposed；B. the superconducting layer of two superconductivity wires is placed face-to-face, the powder solder of RE, Ba and Cu oxide phase can be generated during heat treatment in intermediate addition；C. heat treatment is carried out under low oxygen partial pressure appropriate makes the powder solder react, and the RE, Ba and Cu oxide of anoxic state mutually in superconducting layer surface epitaxial growth and then connects two superconducting layers；D. oxygenation heat treatment is carried out under high keto sectional pressure appropriate, RE, Ba and Cu oxide is made mutually to have superconductivity, to realize the superconduction connection between two superconductivity wires.This method can simplify preparation flow, shorten the production time, reduce production cost, and the superconduction connection of band is realized under the premise of not damaging metal base band as far as possible.
Description
Technical field
The present invention relates to high temperature super conductive conductor technologies, and in particular to a kind of for the super of RE, Ba and Cu oxide high temperature super conductive conductor
Docking head production method.
Background technique
When with superconductivity wire coiling magnet coil, connector plays the connection function of conducting wire, and performance directly influences line
The entirety of circle is electrically.Non-resistance, that is, superconducting joint welding processing technology is particularly significant, can be answered using the superconducting coil of the technology
It is the technology that High-Field stable state magnet must capture for the magnet of operation with closed ring.Constant current work may be implemented in the coil of whole superconduction
Operation mode (Permanent Current Mode, abbreviation PCM), the electric current in coil can keep constant lossless, nothing for a long time
Need external power supply.In the MR imaging apparatus being medically used widely, magnet coil therein is exactly to have used superconduction
The technology of connector can be widely used for the detection and treatment of disease.
Superconductivity wire is generally divided into two major class of low-temperature superconducting and high-temperature superconductor at present, and wherein low-temperature superconducting conducting wire is typical
Operating temperature be liquid helium temperature (4.2K), such as existing MR imaging apparatus mostly use NbTi low-temperature superconducting conducting wire around
System, superconducting joint technology are highly developed.The typical operating temperature of high temperature super conductive conductor is liquid nitrogen temperature (77K), according to industry
Change process is divided into two generations: first generation bismuth-strontium-calcium-copper-oxygen (Bi2Sr2Ca2Cu3Ox) conducting wire and second generation RE, Ba and Cu oxide
(REBa2Cu3Oy, wherein RE is rare earth element) and conducting wire.Since high temperature super conductive conductor has very broad application prospect, Er Qieqi
Application technology is largely also directed to the processing of superconducting magnet coil, therefore processes the superconducting joint technology of high quality to high temperature
The development of superconductor technology is vital.
First generation bismuth-strontium-calcium-copper-oxygen conducting wire is made using powder-in-tube method, and superconducting joint technology has been mature on the whole.This
Two section leads are overlapped on one mainly after carrying out chemical attack to wire termination by the processing method of class conducting wire superconducting joint
After rising, is wrapped up and pressurizeed using silver foil, finally carry out annealing heat-treatment.In addition, also can be used superconductive powder as middle layer,
Apply compression under hot conditions, fiting chemical corrosion is connect with the methods of mechanical stripping realization conducting wire, and after a series of
The superconducting joint with excellent performance is made in continuous heat treatment.
It being made in two generation RE, Ba and Cu oxide conducting wires using multilayer coating film method, typical structure is mainly made of four parts,
It is from bottom to up respectively that metallic substrates, transition zone, superconducting layer and silver-colored stabilized zone, some band most external can also wrap up one layer of copper
Protective layer.In terms of the welding of this kind of conducting wire, forms and received the mature joint technique of Europe grade resistance, however superconducting joint technology is still
Prematurity, only South Korea Park et al. once prepared in 2014 not resistance superconducting joint (Npg Asia Materials,
2014,6:e98；Superconductor Science&Technology, 2014,27 (8): 085008).Its preparation process master
It to include five stages: laser boring, strip surface pretreatment, overlap joint, vacuum heat treatment and oxygenation.The critical current of connector can
Reach the level of initial conducting wire, still, the oxygenation time which uses is up to 350 hours, and needs progress is intensive to swash
Light punching, therefore time-consuming, at high cost for this method, is unfavorable for large-scale industrial production.
Summary of the invention
It is a kind of for RE, Ba and Cu oxide high-temperature superconductor it is a primary object of the present invention to overcome the deficiencies of the prior art and provide
The superconducting joint production method of conducting wire simplifies preparation flow, shortens the production time, reduces production cost, do not damaging gold as far as possible
The superconduction connection of band is realized under the premise of belonging to base band.
To achieve the above object, the invention adopts the following technical scheme:
A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor, comprising the following steps:
A. carrying out silver layer removal processing to the end of two superconductivity wires keeps superconducting layer exposed；
B. the superconducting layer of two superconductivity wires is placed face-to-face, in centre, addition can generate rare earth during heat treatment
The powder solder of barium copper oxygen phase, it is preferable that the heat treatment temperature that the powder solder reacts is lower than the superconductivity wire
The fusing point of superconducting layer；
C. heat treatment is carried out under low oxygen partial pressure appropriate makes the powder solder react, the rare earth barium copper of anoxic state
Oxygen mutually in superconducting layer surface epitaxial growth and then connects two superconducting layers；
D. oxygenation heat treatment is carried out under high keto sectional pressure appropriate, RE, Ba and Cu oxide is made mutually to have superconductivity, thus real
Superconduction connection between existing two superconductivity wires.
Further:
Silver layer removal processing in step a is silver layer corrosion treatment.
Corrosion silver layer processing in step a uses NH3·H2O and H2O2Aqueous solution, NH in the aqueous solution3·H2O's
Volume fraction is 5%~50%, H2O2Volume fraction be 5%~50%.
Powder solder in step b at least contains RE, Ba and Cu oxide powder, can be RE, Ba and Cu oxide powder and copper oxide
The mixtures such as powder, wherein RE may be selected in RE, Ba and Cu oxide powder1Ba2Cu3OyWith RE2BaCuO5, the mass fraction of the latter one
Optional range is 0%~50%；It is preferred that the silver powder or oxidation silver powder as auxiliary agent are additionally added, it is highly preferred that silver powder or silver oxide
The optional range of mass fraction shared by powder is 0.1%~20%；
Or it includes rare earth oxide powder, barium monoxide or barium carbonate powder, cupric oxide powder that powder solder, which is,
Mixture, it is preferable that powder solder be include yttrium oxide powder, barium carbonate or barium oxide powder, cupric oxide powder and KOH powder
Mixture, it is highly preferred that in powder solder the ratio between amount of substance of yttrium, three kinds of barium, copper elements be 1:2:3, the matter of KOH powder
The optional range that amount accounts for powder solder quality score is 5%~50%；
Preferably, the partial size of powder is 10 nanometers~10 microns.
Selectable rare earth element includes Y, Yb, Tm, Er, Ho, Dy, Gd, Eu, Sm, Nd, La in step b.
Ag powder, Ag are added in powder solder2O powder, KOH powder or NaOH powder are as heat treatment adjuvant, the partial size of auxiliary agent powder
It is 10 nanometers~10 microns, the mass fraction in powder solder is 0.1%~50%.
It is fixed, it is preferable to use mechanical that pressurization is carried out to two superconductivity wires after powder solder is added in centre in step b
Pressuring method fixes the junction of two conducting wires, and pressure range is 0.1MPa~300MPa.
Low oxygen partial pressure in step c is 0.001Pa~100Pa, and heat treatment temperature is 500 DEG C~900 DEG C, heat treatment heat preservation
Time is 0.1 minute~12 hours.
High keto sectional pressure in step d is 1 × 104Pa~1 × 107Pa, heat treatment temperature are 400 DEG C~600 DEG C, heat treatment
Soaking time is 1 hour~200 hours.
After step d, subsequent silver-plated process is carried out to the welding portion of acquisition to protect superconducting phase, and/or package copper
Simple substance, copper alloy or stainless steel material are to enhance mechanical performance.
Beneficial effects of the present invention:
The present invention provides a kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor, Neng Goufang
Just, efficiently, reliably, the superconduction that is achieved at low cost between two superconductivity wires connection.This method use can be in heat treatment process
The middle predecessor powder solder for generating RE, Ba and Cu oxide phase, the heat treatment temperature especially to react are super lower than superconductivity wire
The powder solder of the fusing point of conducting shell can generate RE, Ba and Cu oxide phase during heat treatment, place it in two sections of surface treateds
Superconductivity wire between, by the heat treatment under low oxygen partial pressure appropriate, keep RE, Ba and Cu oxide mutually raw in superconducting layer surface extension
It is long, and then two superconducting layers are connected, then be heat-treated through the oxygenation under high keto sectional pressure appropriate, realizing has the conducting wire of superconductivity
Connector.Compared with prior art, the present invention can greatly simplify preparation flow, shorten the production time, reduce production cost, as far as possible
The superconduction connection of band is realized under the premise of not damaging metal base band.
In preferred technical solution, the heat treatment temperature that the powder solder of use reacts is lower than conducting wire superconducting layer
Fusing point, therefore the superconduction connection between two superconducting layers can be being realized under lower heat treatment temperature, to weaken metallic substrates
Oxidation and superconducting layer oxygen loss.The superconducting joint finally obtained is former in liquid nitrogen temperature and from superconduction critical electric current off field
Beginning superconductivity wire wherein one critical current 10%~100%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of two superconductivity wires and solder that the embodiment of the present invention one provides；
Fig. 2 is the heat treatment cycle curve for the sintering stage that the embodiment of the present invention one and embodiment two provide；
Fig. 3 is the heat treatment cycle curve in the oxygenation stage that the embodiment of the present invention one provides；
Fig. 4 is the connector situation with angle theta that the embodiment of the present invention three provides.
Specific embodiment
It elaborates below to embodiments of the present invention.It is emphasized that following the description is only exemplary,
The range and its application being not intended to be limiting of the invention.
Refering to fig. 1, in one embodiment, a kind of superconducting joint production side for RE, Ba and Cu oxide high temperature super conductive conductor
Method, comprising the following steps:
A. carrying out silver layer removal processing to the end of two superconductivity wires keeps superconducting layer exposed；
B. the superconducting layer of two superconductivity wires is placed face-to-face, in centre, addition can generate rare earth during heat treatment
The powder solder of barium copper oxygen phase；
C. heat treatment is carried out under low oxygen partial pressure appropriate makes the powder solder react, the rare earth barium copper of anoxic state
Oxygen mutually in superconducting layer surface epitaxial growth and then connects two superconducting layers；
D. oxygenation heat treatment is carried out under high keto sectional pressure appropriate, RE, Ba and Cu oxide is made mutually to have superconductivity, thus real
Superconduction connection between existing two superconductivity wires.
Different from the superconducting joint production method of existing superconductivity wire, superconducting joint production method of the invention uses powder
Solder as can in phase heat treatment process generate RE, Ba and Cu oxide phase predecessor, by heat treatment make RE, Ba and Cu oxide phase
The superconduction connection between two superconductivity wires is realized in the epitaxial growth between the superconducting layer surface of two conducting wires.Specifically, first
First can the end to two superconductivity wires carry out silver layer corrosion treatment and keep superconducting layer exposed, the superconducting layer of two conducting wires is face-to-face
It places, powder solder is added in centre and carries out pressurization fixation, heat treatment is then carried out under low oxygen partial pressure appropriate makes powder
Solder reacts, and the RE, Ba and Cu oxide of anoxic state mutually in superconducting layer surface epitaxial growth and then connects two superconducting layers, later
Oxygenation heat treatment is carried out under high keto sectional pressure appropriate, RE, Ba and Cu oxide is made mutually to have superconductivity, to realize two conducting wires
Between superconduction connection.
In a preferred embodiment, what the powder solder used in step b reacted is lower than described at phase heat treatment temperature
The fusing point of the superconducting layer of superconductivity wire.Since the heat treatment temperature that powder solder reacts is molten lower than superconductivity wire superconducting layer
Point, therefore relative to existing superconductivity wire superconduction connection method, preferred technical solution can be in lower heat treatment temperature
The lower superconduction connection realized between two superconducting layers, so as to weaken the oxidation of metallic substrates and the oxygen loss of superconducting layer, has
Conducive to the mechanical performance and current-carrying performance for keeping superconductivity wire.
In some embodiments, the powder solder in step b at least contains RE, Ba and Cu oxide powder, can be rare earth barium copper
The mixtures such as oxygen powder and cupric oxide powder, wherein RE may be selected in RE, Ba and Cu oxide powder1Ba2Cu3OyWith RE2BaCuO5, wherein
The optional range of the mass fraction of the latter is 0%~50%；It is preferred that being additionally added the silver powder or oxidation silver powder as auxiliary agent, more preferably
The mass fraction range that ground, silver powder or oxidation silver powder account for powder solder is 0.1%~20%.
In further embodiments, powder solder be include rare earth oxide powder, barium monoxide or barium carbonate powder,
The mixture of cupric oxide powder, it is preferable that powder solder be include yttrium oxide powder, barium carbonate or barium oxide powder, copper oxide
The mixture of powder and the KOH powder as auxiliary agent, it is highly preferred that the amount of the substance of three kinds of yttrium in powder solder, barium, copper elements
The ratio between be 1:2:3, the quality of KOH powder account for powder solder quality score optional range be 5%~50%.
Preferably, the powder diameter of powder solder used is 10 nanometers~10 microns.
It is illustrated below by way of more specific embodiment.
Embodiment one
A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor, includes the following steps:
(S1) the silver-colored stabilized zone for corroding two superconductivity wire ends, keeps superconducting layer exposed；
(S2) mischmetal barium copper oxygen powder and the silver powder as auxiliary agent, as powder solder；
(S3) superconducting layer of two conducting wires is placed face-to-face, powder solder is added in centre；
(S4) two conducting wires of powder solder are added to centre and carry out pressurization fixation；
(S5) heat treatment is carried out under low oxygen partial pressure makes powder solder that local fusing occur, then the rare earth barium of anoxic state occurs
Copper oxygen mutually generates reaction, this mutually in superconducting layer surface epitaxial growth and then connects two superconducting layers；
(S6) oxygenation heat treatment is carried out under high keto sectional pressure, RE, Ba and Cu oxide is made mutually to have superconductivity, to realize two
Superconduction connection between root conducting wire.
In step (S1), corroding silver-colored stabilized zone step, it is preferable to use NH3·H2O and H2O2Aqueous solution, in the solution
NH3·H2The optional range of the volume fraction of O is 5%~50%, uses 12% in the present embodiment；H2O2The optional model of volume fraction
Enclosing is 5%~50%, and 15% is used in the present embodiment.
In step (S2), the optional range of the partial size of RE, Ba and Cu oxide powder and silver powder is 10 nanometers~10 microns, this
About 1 micron is used in embodiment；The optional range of mass fraction shared by silver powder is 0.1%~20%, is used in the present embodiment
5%；Rare earth element selectable range in RE, Ba and Cu oxide powder includes Y, Yb, Tm, Er, Ho, Dy, Gd, Eu, Sm, Nd, La
Deng, in the present embodiment use Y.
In step (S3), referring to Fig. 1, connection structure includes: first for two superconductivity wires and powder solder-connected structure
3, second superconductions of superconducting layer 2, powder solder of 1, first superconductivity wire of the metallic substrates of root superconductivity wire and transition zone are led
The metallic substrates and transition zone 5 of 4, second superconductivity wires of superconducting layer of line.
In step (S4), the junction of two conducting wires is fixed using mechanical pressurization mode, the optional range of pressure range is
0.1MPa~300Mpa uses 100MPa in the present embodiment.
In step (S5), referring to fig. 2, the optional range of atmosphere partial pressure of oxygen is 0.001Pa to the heat treatment cycle curve of sintering stage
~100Pa uses 1Pa in the present embodiment；The optional range of heat treatment temperature T2 be 500 DEG C~900 DEG C, more preferably 700 DEG C~850
DEG C, 810 DEG C are used in the present embodiment；Being heat-treated the optional range of soaking time t2 is 0.1 minute~12 hours, is made in the present embodiment
With 1 minute.
In step (S6), the heat treatment cycle curve in stage is oxygenated referring to Fig. 3, the optional range of atmosphere partial pressure of oxygen is 1 × 104Pa
~1 × 107Pa uses 1 × 10 in the present embodiment5Pa；The optional range of heat treatment temperature T3 is 400 DEG C~600 DEG C, the present embodiment
It is middle to use 500 DEG C；Being heat-treated the optional range of soaking time t3 is 1 hour~200 hours, is used 100 hours in the present embodiment.
The superconducting joint finally obtained is original superconductivity wire wherein one in liquid nitrogen temperature and certainly critical current off field
Critical current 10%~100%.
The superconducting joint can carry out subsequent silver-plated process, to protect superconducting phase；Copper simple substance can also be wrapped up, copper closes
The materials such as gold, stainless steel, to enhance mechanical performance.
Embodiment two
A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor, includes the following steps:
(S1) corrode two superconductivity wire end silver stabilized zones, keep superconducting layer exposed；
(S2) mixed oxidization yttrium powder end, barium carbonate (or barium monoxide) powder, cupric oxide powder and the KOH powder as auxiliary agent
End obtains powder solder；
(S3) superconducting layer of two conducting wires is placed face-to-face, powder solder is added in centre；
(S4) two conducting wires of powder solder are added to centre and carry out pressurization fixation；
(S5) heat treatment is carried out under low oxygen partial pressure makes powder solder react, the RE, Ba and Cu oxide Xiang Chao of anoxic state
Two superconducting layers of the epitaxial growth of conducting shell surface and then connection；
(S6) oxygenation heat treatment is carried out under high keto sectional pressure, RE, Ba and Cu oxide is made mutually to have superconductivity, to realize two
Superconduction connection between root conducting wire.
In above-mentioned steps, the selection situation of partial parameters is the same as example 1, and is carried out below to different situations
Description: in step (S2), the ratio between amount of substance of yttrium, three kinds of barium, copper elements is 1:2:3 in powder solder；The matter of KOH powder
The optional range that amount accounts for powder solder quality score is 5%~50%, and mass fraction used in the present embodiment is 30%.
In step (S5), the heat treatment cycle curve of sintering stage also can be found in Fig. 2, and the optional range of atmosphere partial pressure of oxygen is
0.001Pa~100Pa uses 1Pa in the present embodiment；The optional range of heat treatment temperature T2 is 500 DEG C~700 DEG C, the present embodiment
It is middle to use 600 DEG C；Being heat-treated the optional range of soaking time t2 is 1 hour~12 hours, is used 10 hours in the present embodiment.
In step (S6), oxygenation heat treatment is carried out under high keto sectional pressure can be similar with embodiment one.
Embodiment three
A kind of epitaxial growth of the RE, Ba and Cu oxide high temperature super conductive conductor welding applied to two non parallel position relationships connects
Head technology, the operating procedure of this embodiment and embodiment one is essentially identical, only needs in S2 step according to coil winding needs,
While two conducting wires are placed face-to-face, using certain angle theta, as shown in Figure 4.
The above content is combine it is specific/further detailed description of the invention for preferred embodiment, cannot recognize
Fixed specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, some replacements or modifications can also be made to the embodiment that these have been described,
And these substitutions or variant all shall be regarded as belonging to protection scope of the present invention.
Claims (10)
1. a kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor, which is characterized in that including following step
It is rapid:
A. carrying out silver layer removal processing to the end of two superconductivity wires keeps superconducting layer exposed；
B. the superconducting layer of two superconductivity wires is placed face-to-face, in centre, addition can generate yttrium barium copper oxide during heat treatment
The powder solder of phase, the powder solder contains yttrium barium copper oxide powder and the KOH powder or NaOH powder as heat treatment adjuvant, described
The fusing point at phase heat treatment temperature lower than the superconducting layer of the superconductivity wire that powder solder reacts；
C. heat treatment is carried out under low oxygen partial pressure appropriate makes the powder solder react, and the yttrium barium copper oxide of anoxic state mutually exists
Two superconducting layers of superconducting layer surface epitaxial growth and then connection；
D. oxygenation heat treatment is carried out under high keto sectional pressure appropriate, yttrium barium copper oxide is made mutually to have superconductivity, to realize two
Superconduction connection between superconductivity wire.
2. superconducting joint production method as described in claim 1, which is characterized in that the silver layer removal processing in step a is silver
Layer corrosion treatment.
3. superconducting joint production method as claimed in claim 2, which is characterized in that the corrosion silver layer in step a, which is handled, to be used
NH3·H2O and H2O2Aqueous solution, NH in the aqueous solution3·H2The volume fraction of O is 5%~50%, H2O2Volume fraction
It is 5%~50%.
4. superconducting joint production method as described in claim 1, which is characterized in that in step b powder solder be include oxidation
Yttrium powder end, barium carbonate or barium oxide powder, cupric oxide powder and KOH powder mixture, yttrium, barium, three kinds of copper in powder solder
The ratio between amount of substance of element is 1:2:3, and the range that the quality of KOH powder accounts for powder solder quality score is 5%~50%.
5. superconducting joint production method as claimed in claim 4, which is characterized in that the partial size of powder is 10 nanometers~10 micro-
Rice.
6. superconducting joint production method as claimed in claim 4, which is characterized in that the partial size of auxiliary agent powder is 10 nanometers~10
Micron, the mass fraction in powder solder are 0.1%~50%.
7. such as superconducting joint production method as claimed in any one of claims 1 to 6, which is characterized in that be added in step b in centre
Pressurization fixation is carried out to two superconductivity wires after powder solder, the junction of two conducting wires is fixed using mechanical pressurization mode,
Pressure range is 0.1MPa~300MPa.
8. such as superconducting joint production method as claimed in any one of claims 1 to 6, which is characterized in that the low oxygen partial pressure in step c
For 0.001Pa~100Pa, heat treatment temperature is 500 DEG C~900 DEG C, and heat treatment soaking time is 0.1 minute~12 hours.
9. such as superconducting joint production method as claimed in any one of claims 1 to 6, which is characterized in that the high keto sectional pressure in step d
It is 1 × 104Pa~1 × 107Pa, heat treatment temperature are 400 DEG C~600 DEG C, and heat treatment soaking time is 1 hour~200 hours.
10. such as superconducting joint production method as claimed in any one of claims 1 to 6, which is characterized in that after step d, to acquisition
Welding portion carry out subsequent silver-plated process with protect superconducting phase, and/or package copper simple substance, copper alloy or stainless steel material with
Enhance mechanical performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510896584.XA CN105390902B (en) | 2015-12-07 | 2015-12-07 | A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510896584.XA CN105390902B (en) | 2015-12-07 | 2015-12-07 | A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105390902A CN105390902A (en) | 2016-03-09 |
| CN105390902B true CN105390902B (en) | 2019-03-01 |
Family
ID=55422880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510896584.XA Active CN105390902B (en) | 2015-12-07 | 2015-12-07 | A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105390902B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016219374B4 (en) | 2016-10-06 | 2018-06-14 | Siemens Aktiengesellschaft | Long-term stable and cohesive current path connection for low-voltage, medium-voltage and / or high-voltage systems or switching devices by means of nanomaterials |
| CN106356692B (en) * | 2016-10-28 | 2018-10-16 | 清华大学深圳研究生院 | A kind of device and method of processing superconductivity wire connector interfaces |
| WO2018211700A1 (en) * | 2017-05-19 | 2018-11-22 | 住友電気工業株式会社 | Superconducting wire material, superconducting coil, superconducting magnet, and superconducting device |
| CN107871936A (en) * | 2017-09-29 | 2018-04-03 | 中国科学院电工研究所 | A kind of preparation method of second-generation high-temperature superconductor joint |
| CN108406169B (en) * | 2018-02-02 | 2020-09-11 | 北京交通大学 | Welding joint and welding method of low-resistance yttrium high-temperature superconductor based on nano silver solder |
| CN110600189B (en) * | 2019-09-23 | 2020-10-27 | 西北有色金属研究院 | Stripping and recycling method of coated conductor strip |
| CN111106453B (en) * | 2019-12-09 | 2021-07-20 | 东部超导科技（苏州）有限公司 | Connecting method of second-generation high-temperature superconducting tapes and superconducting wire |
| CN111009798B (en) * | 2019-12-20 | 2022-07-01 | 中国科学院电工研究所 | Multi-core iron-based superconducting joint and preparation method thereof |
| CN113593767B (en) * | 2020-04-30 | 2022-11-04 | 中国科学院电工研究所 | Connection method of second-generation high-temperature superconducting wire and connection superconducting wire |
| JP7481963B2 (en) * | 2020-09-01 | 2024-05-13 | 株式会社東芝 | Superconducting layer connection structure, superconducting wire, superconducting coil, superconducting device, and superconducting layer connection method |
| CN114220650B (en) * | 2021-12-20 | 2024-03-29 | 中国科学院电工研究所 | Second-generation high-temperature superconducting tape closed coil and preparation method thereof |
| CN114221191B (en) * | 2022-01-06 | 2023-12-01 | 中国科学院电工研究所 | Connection method of second-generation high-temperature superconducting tape and connection superconducting wire |
| CN114937539A (en) * | 2022-06-07 | 2022-08-23 | 合肥国际应用超导中心 | REBCO high-temperature superconducting coil inner joint, welding device and preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291021A (en) * | 2007-11-16 | 2008-10-22 | 中国科学院电工研究所 | Connecting method of MgB* superconduction in strip shape |
| CN101475394A (en) * | 2009-01-23 | 2009-07-08 | 清华大学 | Method for preparing large size yttrium system block material by Ag2O adding YBCO solder brazing |
| CN101971273A (en) * | 2008-08-04 | 2011-02-09 | K·约恩 | Method for joining second-generation high-temperature superconducting wires by melting diffusion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110105679A (en) * | 2010-03-19 | 2011-09-27 | 고려대학교 산학협력단 | Superconducting joint method of hts 1g wire with superconducting powder using melting diffusion technique |
-
2015
- 2015-12-07 CN CN201510896584.XA patent/CN105390902B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291021A (en) * | 2007-11-16 | 2008-10-22 | 中国科学院电工研究所 | Connecting method of MgB* superconduction in strip shape |
| CN101971273A (en) * | 2008-08-04 | 2011-02-09 | K·约恩 | Method for joining second-generation high-temperature superconducting wires by melting diffusion |
| CN101475394A (en) * | 2009-01-23 | 2009-07-08 | 清华大学 | Method for preparing large size yttrium system block material by Ag2O adding YBCO solder brazing |
Non-Patent Citations (1)
| Title |
|---|
| Joining of YBa2Cu3Ox with High Critical Current;KEIICHI KIMURA等;《Advances in Superconductivity VII》;19951231;第681-684页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105390902A (en) | 2016-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105390902B (en) | A kind of superconducting joint production method for RE, Ba and Cu oxide high temperature super conductive conductor | |
| JP4058920B2 (en) | Superconducting connection structure | |
| US8745851B2 (en) | Process for fabricating an ultra-low-resistance superconducting joint having high shielding characteristics | |
| CN105355357B (en) | A kind of Fe-base compound superconducting joint and preparation method thereof | |
| CN103875125A (en) | Method for joining second generation ReBCO high temperature superconductors using partial micro-melting diffusion welding by direct contact of high temperature superconductors and for recovering superconducting characteristics by oxygen supply annealing heat treatment | |
| CN102449848A (en) | Superconductive connecting device for the end pieces of two superconductors and method for the production thereof | |
| CN106158139B (en) | A kind of preparation method of high-temperature superconductor CICC conductors | |
| CN111243818B (en) | Superconducting joint of niobium-tin superconducting wire and niobium-titanium superconducting wire and preparation method thereof | |
| CN105390830B (en) | Realize the method and structure that superconduction connects between RE, Ba and Cu oxide high temperature super conductive conductor | |
| CN101291021B (en) | Connecting method of MgB* superconduction in strip shape | |
| JP3386942B2 (en) | Oxide superconducting coil and manufacturing method thereof | |
| CN108711472A (en) | A kind of director circle section high-temperature superconductor conductor based on REBCO superconducting tapes | |
| CN103354130B (en) | A kind of preparation method of iron-based superconductivity wire | |
| CN102623167A (en) | Method for manufacturing closed loop superconducting coil by using magnesium diboride and closed loop superconducting coil | |
| CN100584519C (en) | Preparation of Bi-2212/Ag superconducting tape | |
| JP2004047441A (en) | Manufacturing method for superconducting wire material using mgb2 hollow filament as base material | |
| JP2002373534A (en) | Superconducting wire, its producing method, and superconducting magnet using it | |
| KR101343887B1 (en) | Splicing method for superconductive wires containing mg and b | |
| JP5977261B2 (en) | Ultra-low resistance connection between superconducting wires and method of forming the connection | |
| JPH05283138A (en) | Superconductive joint for superconductive oxide tape | |
| CN100498984C (en) | Superconductive cable assembly and preparing process thereof | |
| CN114220650B (en) | Second-generation high-temperature superconducting tape closed coil and preparation method thereof | |
| JP3447990B2 (en) | Superconducting connection method and superconducting connection structure for superconducting wires | |
| CN202887898U (en) | Closed-loop superconducting coil | |
| CN111341495B (en) | Nb-shaped alloy3Sn superconducting wire repairing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |