CN108957040A - A kind of differently curved radius critical current test sample bar of iron-based superconducting material - Google Patents
A kind of differently curved radius critical current test sample bar of iron-based superconducting material Download PDFInfo
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- CN108957040A CN108957040A CN201810724605.3A CN201810724605A CN108957040A CN 108957040 A CN108957040 A CN 108957040A CN 201810724605 A CN201810724605 A CN 201810724605A CN 108957040 A CN108957040 A CN 108957040A
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- epoxy
- nbti
- iron
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- nbti superconducting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The invention discloses a kind of differently curved radius critical current test sample bars of iron-based superconducting material, it include low temperature flange, foam protective shield of radiation, current feed, stainless steel support rod, top NbTi superconducting line, lead fixed block, lower section NbTi superconducting line, epoxy sample frame, link block and specimen holder copper end, by introducing NbTi superconducting line, utilize its critical performance and mechanical property characteristics, not only reduce leakage heat, enhance stability, the flexibility and reliability for increasing specimen holder simultaneously, are easily changed sample；It is embedded in radian matched specimen holder structure using copper end, makes sample that simultaneously its performance of actual response to be reliably installed, while having saved test sample consumption；Utilize the different melting points and mechanical property characteristics between different scolding tin; on the one hand make NbTi superconducting line that there is higher intensity using higher temperature scolding tin; on the other hand superconducting sample is protected using lower temperature scolding tin, while NbTi superconducting line in welding process is avoided to fall off.
Description
Technical field
The present invention relates to the critical current the field of test technology for detecting iron-based superconducting wires/strips minimum bending radius,
More particularly to a kind of differently curved radius critical current test sample bar of iron-based superconducting material.
Background technique
Superconductor has surprise not available for many conventional materials such as zero resistance, perfect diamganetism and macroscopic quantum effect
Property values are widely used in the numerous areas such as electric power, electronics, military affairs, medical treatment, communications and transportation, the energy, high-intensity magnetic field, high-energy physics.
Before the nineties in last century, the research of practical superconductor is concentrated mainly on low temperature superconducting material.As high temperature in 1986 is super
Conductor is found, and has been started one in the world and has been chased to High-t_c Superconductivity, new superconductor is caused constantly to come out.
A Japanese research group in 2008 has found a kind of new iron-based superconductor LaFeAsO1-xFx, superconducting critical transformation
Temperature reaches 26K.As the second largest high-temperature superconductor family after copper-based superconductor, iron-based superconductor has more abundant
Physical property and more potential application value.Iron-based superconductor be more like between copper-based superconductor and conventional metals superconductor it
Between a bridge.Current iron-based superconduction has breached the most basic basic barrier of functionization, and High-Field test shows Jc pairs of transmission
The dependence of externally-applied magnetic field is very small, and iron-based superconducting material gets a good chance of obtaining practical application in High-Field field of strong electricity.
By carrying out the critical current test experiments under the differently curved radius of iron-based superconducting material, iron-based superconducting material is understood
Strain property facilitates the research of iron-based superconducting material magnet technology and material development process modification, to realize that it is really real
With change.
Summary of the invention
The object of the invention is to remedy the disadvantages of known techniques, provides a kind of differently curved radius of iron-based superconducting material
Critical current test sample bar.
The present invention is achieved by the following technical solutions:
A kind of differently curved radius critical current test sample bar of iron-based superconducting material, includes low temperature flange, foam radiation protection
Screen, current feed, stainless steel support rod, top NbTi superconducting line, lead fixed block, lower section NbTi superconducting line, epoxy sample frame,
Link block and specimen holder copper end, foam radiation shield are the cystosepiments for being coated with aluminium foil, and the foam protective shield of radiation is fixed
Below low temperature flange, the upper end of two current feeds sequentially passes through foam protective shield of radiation and low temperature flange and upwardly extends,
The lower end of two current feeds is separately connected the upper end of two top NbTi superconducting lines, and the lower end of two top NbTi superconducting lines is solid
Be scheduled in lead fixed block, two lower section NbTi superconducting lines upper end be fixed in lead fixed block and respectively with two top
The lower end of NbTi superconducting line is welded, and the lower end of two lower section NbTi superconducting lines is separately fixed on two pieces of specimen holder copper ends, and two pieces
Specimen holder copper end is separately fixed at the two sides of the epoxy sample frame, and the upper end of the stainless steel support rod is anti-across foam
Radiation shield is simultaneously fixedly connected with low temperature flange, and the bottom end of stainless steel support rod is fixedly connected with the link block, and link block is solid
It is scheduled on the upper end of epoxy sample frame, stainless steel support rod is fixed by screws with lead fixed block.
Multiple epoxy plates are also fixedly connected on the stainless steel support rod, epoxy plate is located at foam protective shield of radiation
Lower section, current feed sequentially pass through multiple epoxy plates.
There are three the epoxy plates, and epoxy plate is circular configuration, and stainless steel support rod sequentially passes through three epoxy plates
Center, epoxy plate are fixedly connected with stainless steel support rod by screw.
The current feed is red copper bar, and the lower end of two current feeds is equipped with the hole greater than 5cm along its length,
The upper end of two top NbTi superconducting lines is separately fixed in two holes.
The top NbTi superconducting line and lower section NbTi superconducting line is the superconducting line that line footpath is greater than 0.7mm, top
It is welded with current feed using Sn60Pb40 scolding tin the upper end of NbTi superconducting line.
The lead fixed block is G10 material, and section is rectangle structure, and center is provided with through-hole, stainless steel support rod
After through-hole and by 3 fastened by screw, there is a width recessed greater than 2mm depth 1mm respectively in the two sides of lead fixed block
Slot, the lower end of top NbTi superconducting line and the upper end of lower section NbTi superconducting line are each attached in groove, and will by four pieces of briquettings
Superconducting line compresses, and briquetting is screwed with lead fixed block.
The epoxy sample frame is G10 material, and the upper end of epoxy sample frame and link block use two screw connections, two
A side is groove type structure, and lower end is arc structure.
The specimen holder copper end using RRR be greater than 50 oxygenless copper material, two sides at specimen holder copper end respectively with
The lower end of two lower section NbTi superconducting lines is welded using Sn60Pb40 scolding tin, and two specimen holder copper ends are embedded in epoxy sample frame both sides
At groove type structure, and two fastened by screw are respectively adopted, the lower end at specimen holder copper end be it is arc-shaped, with epoxy sample frame radian
Match.
The stainless steel post upper is welded and fixed with low temperature flange, for guaranteeing the rigidity of entire specimen holder；Institute
The low temperature flange lower end stated is equipped with foam protective shield of radiation and epoxy plate, for reducing liquid helium consumption；Above and below the epoxy plate
3 pieces have been sequentially distributed, radiation protection is on the one hand used for, has on the other hand been limited for current feed, epoxy plate is cirque structure, according to
Epoxy plate is fastened on stainless steel support rod by screw；The current feed is red copper bar, and lower end is equal along its length
There is a hole for being greater than 5 cm depth, is fixed for top NbTi superconducting line；The NbTi superconducting line is that commercial line footpath is greater than 0.7mm
Superconducting line, critical current in 4.2K from 1000A is greater than off field, and the upper end and current feed are using the progress of Sn60Pb40 scolding tin
Welding, lower end is fixed in lead fixed block；The lead fixed block is G10 material, and section is rectangular knot outside an inner circle
Structure utilizes 3 fastened by screw with stainless steel support rod, and the groove that two sides have a width to be greater than 2mm depth 1mm respectively is used
In fixed top NbTi superconducting line and lower section NbTi superconducting line, relatively narrow briquetting is respectively adopted up and down and is fixed using screw；
The lower section NbTi superconducting line, identical as top NbTi superconducting line, the two is fixed in lead fixed block, and is used
Complete solder, lower section NbTi superconducting line lower end are connected Sn60Pb40 scolding tin with specimen holder copper end along its length；The sample
Frame copper end is greater than 50 oxygenless copper material, side and NbTi superconducting line using RRR and is welded using Sn60Pb40 scolding tin, difference
Embedded in epoxy sample frame both sides, and two fastened by screw are respectively adopted, lower end be it is arc-shaped, with epoxy sample frame radian match；
The epoxy sample frame is G10 material, and the upper end and a link block use two screw connections, and side is groove type knot
Structure, for connecting specimen holder copper end, lower end is the arc structure of certain radius, and sample is installed along circular arc direction, both ends difference
Specimen holder copper end cambered surface is welded in using SnPbBi scolding tin (145 degree of fusing point)；The link block and stainless steel support rod uses
It is welded and fixed.
The invention has the advantages that the present invention is suitable for when liquid helium impregnates under the iron-based differently curved radius of superconducting wires/strips
Critical current test experiments, for studying iron-based superconducting wires/strips critical current with the influence of bending radius, so that it is determined that it can
The minimum bending radius of application.By introducing NbTi superconducting line, using its critical performance and mechanical property characteristics, not only reduce leakage
Heat enhances stability, while increasing the flexibility and reliability of specimen holder, is easily changed sample；Radian is embedded in using copper end
Matched specimen holder structure makes sample reliably install simultaneously its performance of actual response, while having saved test sample consumption；Benefit
With the different melting points and mechanical property characteristics between different scolding tin, on the one hand have NbTi superconducting line using higher temperature scolding tin
There is higher intensity, superconducting sample is on the other hand protected using lower temperature scolding tin, while avoiding NbTi superconduction in welding process
Line falls off.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
As shown in Figure 1, a kind of differently curved radius critical current test sample bar of iron-based superconducting material, includes low temperature process
Blue 1, foam protective shield of radiation 2, current feed 3, stainless steel support rod 4, top NbTi superconducting line 6, lead fixed block 7, lower section
NbTi superconducting line 8, epoxy sample frame 12, link block 9 and specimen holder copper end 11, foam radiation shield are the bubbles for being coated with aluminium foil
Foam plate, the foam protective shield of radiation 2 are fixed below low temperature flange 1, and the upper end of two current feeds 3 sequentially passes through foam
Protective shield of radiation 2 and low temperature flange 1 simultaneously upwardly extend, and the lower end of two current feeds 3 is separately connected two top NbTi superconducting lines 6
Upper end, the lower end of two top NbTi superconducting lines 6 is fixed in lead fixed block 7, the upper end of two lower section NbTi superconducting lines 8
It is fixed in lead fixed block 7 and the lower end with two top NbTi superconducting lines 6 is welded respectively, two lower section NbTi superconducting lines 8
Lower end be separately fixed on two pieces of specimen holder copper ends 11, two pieces of specimen holder copper ends 11 are separately fixed at the epoxy sample frame
12 two sides, the upper end of the stainless steel support rod 4 passes through foam protective shield of radiation 2 and is fixedly connected with low temperature flange 1, stainless
The bottom end of bracing members bar 4 is fixedly connected with the link block 9, and link block 9 is fixed on the upper end of epoxy sample frame 12, stainless steel
Support rod 4 is fixed by screws with lead fixed block 7.
Multiple epoxy plates 5 are also fixedly connected on the stainless steel support rod 4, epoxy plate 5 is located at foam radiation protection
The lower section of screen 2, current feed 3 sequentially pass through multiple epoxy plates 5.
There are three the epoxy plates 5, and epoxy plate 5 is circular configuration, and stainless steel support rod 4 sequentially passes through three epoxy plates
5 center, epoxy plate 5 are fixedly connected with stainless steel support rod 4 by screw.
The current feed 3 is red copper bar, and the lower end of two current feeds 3 is equipped with along its length greater than 5cm's
The upper end in hole, two top NbTi superconducting lines 6 is separately fixed in two holes.
The top NbTi superconducting line 6 and lower section NbTi superconducting line 8 is the superconducting line that line footpath is greater than 0.7mm, top
It is welded with current feed 3 using Sn60Pb40 scolding tin the upper end of NbTi superconducting line 6.
The lead fixed block 7 is G10 material, and section is rectangle structure, and center is provided with through-hole, stainless steel support rod
After through-hole and by 3 fastened by screw, there is a width recessed greater than 2mm depth 1mm respectively in the two sides of lead fixed block
Slot, the lower end of top NbTi superconducting line and the upper end of lower section NbTi superconducting line are each attached in groove, and pass through four pieces of briquettings 10
Superconducting line is compressed, briquetting 10 is screwed with lead fixed block 7.
The epoxy sample frame 12 is G10 material, and the upper end of epoxy sample frame 12 and link block are connected using two screws
It connects, two sides are groove type structure, and lower end is arc structure.
The specimen holder copper end 11 is greater than 50 oxygenless copper material, two sides point at specimen holder copper end 11 using RRR
Lower end not with two lower section NbTi superconducting lines 8 is welded using Sn60Pb40 scolding tin, and two specimen holder copper ends 11 are embedded in epoxy sample
At 12 both sides groove type structure of product frame, and two fastened by screw are respectively adopted, the lower end at specimen holder copper end 11 be it is arc-shaped, with ring
12 radian of oxygen specimen holder matches.
When test, the epoxy sample frame 12 of different arc radius and specimen holder copper end 11 are connected first, form series
The intact sample frame of different radii.Then NbTi superconducting line is welded in copper end side surface, then superconducting sample is installed on specimen holder
Cambered surface, superconducting sample both ends successively use lower temperature scolding tin to be welded in copper end cambered surface.By soldered sample and specimen holder
It is fixed on link block by Fig. 1 mode, then two sides upper and lower NbTi superconducting line is fixed in lead fixed block using briquetting, it will
NbTi superconducting line is weldingly connected among two briquettings.Connect current potential lead.The specimen holder after sample will be installed to be slowly positioned at
In low temperature environment, outer current lead and current potential lead are connected, is powered to sample, and record sample current-voltage curve, thus
Obtain the relationship between sample critical current and bending radius.
Claims (8)
1. a kind of differently curved radius critical current test sample bar of iron-based superconducting material, it is characterised in that: include low temperature process
Orchid, foam protective shield of radiation, current feed, stainless steel support rod, top NbTi superconducting line, lead fixed block, lower section NbTi superconduction
Line, epoxy sample frame, link block and specimen holder copper end, the foam protective shield of radiation are fixed below low temperature flange, and two
The upper end of current feed sequentially passes through foam protective shield of radiation and low temperature flange and upwardly extends, the lower end difference of two current feeds
The upper end of two top NbTi superconducting lines is connected, the lower end of two top NbTi superconducting lines is fixed in lead fixed block, and two
The upper end of lower section NbTi superconducting line is fixed in lead fixed block and the lower end with two top NbTi superconducting lines is welded respectively, and two
The lower end of NbTi superconducting line is separately fixed on two pieces of specimen holder copper ends below root, and two pieces of specimen holder copper ends are separately fixed at described
Epoxy sample frame two sides, the upper end of the stainless steel support rod pass through foam protective shield of radiation and with low temperature flange is fixed connects
It connects, the bottom end of stainless steel support rod is fixedly connected with the link block, and link block is fixed on the upper end of epoxy sample frame, stainless
Bracing members bar is fixed by screws with lead fixed block.
2. the differently curved radius critical current test sample bar of a kind of iron-based superconducting material according to claim 1, special
Sign is: multiple epoxy plates is also fixedly connected on the stainless steel support rod, epoxy plate is located at foam protective shield of radiation
Lower section, current feed sequentially pass through multiple epoxy plates.
3. the differently curved radius critical current test sample bar of a kind of iron-based superconducting material according to claim 2, special
Sign is: there are three the epoxy plates, and epoxy plate is circular configuration, and stainless steel support rod sequentially passes through in three epoxy plates
The heart, epoxy plate are fixedly connected with stainless steel support rod by screw.
4. the differently curved radius critical current test sample bar of a kind of iron-based superconducting material according to claim 1, special
Sign is: the current feed is red copper bar, and the lower end of two current feeds is equipped with the hole greater than 5cm along its length,
The upper end of two top NbTi superconducting lines is separately fixed in two holes.
5. the differently curved radius critical current test sample bar of a kind of iron-based superconducting material according to claim 4, special
Sign is: the top NbTi superconducting line and lower section NbTi superconducting line is the superconducting line that line footpath is greater than 0.7mm, top NbTi
It is welded with current feed using Sn60Pb40 scolding tin the upper end of superconducting line.
6. the differently curved radius critical current test sample bar of a kind of iron-based superconducting material according to claim 1, special
Sign is: the lead fixed block is G10 material, and section is rectangle structure, and center is provided with through-hole, and stainless steel support rod is worn
It crosses after through-hole and by 3 fastened by screw, has groove of the width greater than 2mm depth 1mm respectively in the two sides of lead fixed block,
The lower end of top NbTi superconducting line and the upper end of lower section NbTi superconducting line are each attached in groove, and pass through four pieces of briquettings for superconduction
Line compresses, and briquetting is screwed with lead fixed block.
7. the differently curved radius critical current test sample bar of a kind of iron-based superconducting material according to claim 1, special
Sign is: the epoxy sample frame is G10 material, and the upper end of epoxy sample frame and link block use two screw connections, two
A side is groove type structure, and lower end is arc structure.
8. the differently curved radius critical current test sample bar of a kind of iron-based superconducting material according to claim 7, special
Sign is: the specimen holder copper end is greater than 50 oxygenless copper material using RRR, and two sides at specimen holder copper end are respectively with two
The lower end of NbTi superconducting line is welded using Sn60Pb40 scolding tin below root, and two specimen holder copper ends are recessed embedded in epoxy sample frame both sides
At bathtub construction, and two fastened by screw are respectively adopted, the lower end at specimen holder copper end be it is arc-shaped, with epoxy sample frame radian phase
Matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810724605.3A CN108957040B (en) | 2018-07-04 | 2018-07-04 | Iron-based superconducting material critical current test sample rod with different bending radii |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810724605.3A CN108957040B (en) | 2018-07-04 | 2018-07-04 | Iron-based superconducting material critical current test sample rod with different bending radii |
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| CN108957040A true CN108957040A (en) | 2018-12-07 |
| CN108957040B CN108957040B (en) | 2021-04-16 |
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Cited By (3)
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| CN110057585A (en) * | 2019-04-18 | 2019-07-26 | 浙江兆丰机电股份有限公司 | The Multifunction Sensor and its hub bearing being mounted on hub bearing |
| CN113720256A (en) * | 2021-08-23 | 2021-11-30 | 中国科学院合肥物质科学研究院 | Device and method for measuring critical bending radius of superconducting tape |
| CN113884958A (en) * | 2021-09-27 | 2022-01-04 | 中国科学院合肥物质科学研究院 | Device and method for measuring critical side bending radius of superconducting tape |
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| CN113884958B (en) * | 2021-09-27 | 2023-07-25 | 中国科学院合肥物质科学研究院 | Device and method for measuring critical lateral bending radius of superconducting strip |
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| CN108957040B (en) | 2021-04-16 |
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