CN105048237B - A kind of MgB2The connection method of superconducting wire - Google Patents
A kind of MgB2The connection method of superconducting wire Download PDFInfo
- Publication number
- CN105048237B CN105048237B CN201510513921.2A CN201510513921A CN105048237B CN 105048237 B CN105048237 B CN 105048237B CN 201510513921 A CN201510513921 A CN 201510513921A CN 105048237 B CN105048237 B CN 105048237B
- Authority
- CN
- China
- Prior art keywords
- mgb
- superconducting wire
- product
- connection method
- powder
- 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
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention provides a kind of MgB2The connection method of superconducting wire, comprises the following steps：First, by the first MgB2Superconducting wire and the 2nd MgB2Superconducting wire carries out pickling processes, and the equal reconditioning in end to be connected is ramp-like；2nd, in the first MgB2Then and MgB Mg B mixed-powders are coated with the end end face to be connected of superconducting wire,2Superconducting wire two is docked；3rd, Nb paper tinsels are coated on the first MgB after docking2Superconducting wire and the 2nd MgB2Outside superconducting wire, Cu pipe sleeves are then obtained into product to be pressed loaded on outside Nb paper tinsels；4th, product to be pressed are suppressed using hydraulic press, obtains compacting product；5th, compacting product are sintered, the MgB after being connected2Superconducting wire.MgB after the present invention connects2Superconducting wire, the resistance of its jointing are less than 1 × 10‑10Ohm, has good superconduction switching performance.
Description
Technical field
The invention belongs to superconductor interconnection technique field, and in particular to a kind of MgB2The connection method of superconducting wire.
Background technology
Magnesium diboride (MgB2) superconductivity of material found that the material is a kind of in 2001 first by Japanese Scientists
Nonmetallic compound with simple binary structure, its superconducting critical transition temperature (Tc) the about 39K under null field, it is current
It is known that there is highest TcSimple binary compound, be in the range of liquid hydrogen temperature, i.e. low field superconducting magnet application in 20K or so
Preferred material.But, MgB similar to high-temperature oxide superconducting material2It is a kind of frangible compounds similar to ceramic property,
Its superconducting transmission performance can be caused to cause irreversible decay under the external force effect such as bending, stretching, torsion.So typically adopt
With after first coiling react (W＆R) technique, i.e., first will insulation after but unreacted MgB2Line (band) material turns to line solenoid
Coil, wherein the superconducting wire between different coils joins end to end, is then integrally heat-treated, is passed through by circle or pie
Chemistry between Mg-B forms the MgB with superconductivity into phase reaction2Superconducting coil.In general MgB2Superconducting magnet is by multiple
MgB2Coil is formed by stacking, and this just needs to make multiple MgB2Superconducting joint.
The quality of superconducting joint directly affects the performance of magnet, and generally crystal grain connects between two wires at superconducting joint
When there may be Weak link phenomenon, cause the superconducting transmission ability of joint area to be less than MgB2Wire rod matrix.Run in magnet
Cheng Zhong, because the factors such as Joule heat cause magnet quenching or even damage magnet, it is relatively low to it requires that superconducting joint must have
Resistance.For MRI superconducting magnet systems, MgB is typically required2The resistance of superconducting joint is less than 1 × 10-10Ohm.
So far, it is not yet found that closing MgB2The connection of superconducting wire simultaneously obtains resistance less than 1 × 10-10Ohm surpasses
The correlative study of docking head is seen in report.
The content of the invention
The technical problems to be solved by the invention are to be directed to above-mentioned the deficiencies in the prior art, there is provided a kind of MgB2Superconduction
The connection method of wire rod.This method combination pass is suppressed and powder sintering process is by two MgB2Superconducting wire links together,
The compacting of its mesothyrid makes joint area bond strength higher, while follow-up sintering heat treatment process can ensure in joint area shape
Into good MgB2Superconducting phase, so as to realize two MgB2The superconduction jointing of superconducting wire.This method can solve the problem that PIT works
Skill prepares the limitation of single length of wires, and then promotes MgB2The practicalization of superconducting wire.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of MgB2The connection method of superconducting wire,
Characterized in that, this method comprises the following steps：
Step 1: respectively to the first MgB2Superconducting wire and the 2nd MgB2Superconducting wire carries out pickling processes, then by pickling
The first MgB after processing2The 2nd MgB behind the end to be connected of superconducting wire and pickling processes2Repair at the end to be connected of superconducting wire
Wear into ramped shaped；
Step 2: the first MgB in step 1 after reconditioning2Mg-B mixing is coated with the end end face to be connected of superconducting wire
Powder, it then will be coated with the first MgB of Mg-B mixed-powders2The 2nd MgB behind the end to be connected of superconducting wire and reconditioning2It is super
Docked at the end to be connected of wire material；The Mg-B mixed-powders by Mg powder and amorphous B powder in molar ratio (1.0~1.1)
: 2 well mixed form；
Step 3: Nb paper tinsels are coated on the first MgB after being docked in step 22Superconducting wire and the 2nd MgB2Superconducting wire
Outside, then by Cu pipe sleeves loaded on outside Nb paper tinsels, product to be pressed are obtained；
Step 4: product to be pressed described in step 3 are fitted into orifice type dies, then by the pass equipped with product to be pressed
Mould is placed in hydraulic press, and compacting product are obtained after compacting, the demoulding；
It is sintered Step 5: product will be suppressed described in step 4 and be placed in sintering furnace, is connected after natural cooling
MgB after connecing2Superconducting wire.
A kind of above-mentioned MgB2The connection method of superconducting wire, it is characterised in that the acid of pickling processes described in step 1
Liquid is salpeter solution, HNO in the salpeter solution3With H2O mol ratio is 1: (1.5~2).
A kind of above-mentioned MgB2The connection method of superconducting wire, it is characterised in that to the first MgB in step 12Superconducting wire
With the 2nd MgB2Before superconducting wire carries out pickling processes, in advance to the first MgB2The end to be connected of superconducting wire and the 2nd MgB2
The end to be connected of superconducting wire carries out sealing with wax and handled to prevent acid liquid corrosion.
A kind of above-mentioned MgB2The connection method of superconducting wire, it is characterised in that the quality of Mg powder described in step 2 is pure
Degree is not less than 99%, and the granularity of the Mg powder is not more than 44 μm.
A kind of above-mentioned MgB2The connection method of superconducting wire, it is characterised in that the matter of amorphous B powder described in step 2
Measure purity and be not less than 99%, the granularity of the amorphous B powder is 0.3 μm~0.5 μm.
A kind of above-mentioned MgB2The connection method of superconducting wire, it is characterised in that the thickness of Nb paper tinsels described in step 3 is
0.05mm~0.2mm.
A kind of above-mentioned MgB2The connection method of superconducting wire, it is characterised in that the pressure suppressed described in step 4 is
10MPa~20MPa, the time of the compacting is 30s~120s.
A kind of above-mentioned MgB2The connection method of superconducting wire, it is characterised in that the temperature of sintering processes described in step 5
Spend for 660 DEG C~680 DEG C, the time of the sintering processes is 1h~2h.
The present invention has advantages below compared with prior art：
1st, the present invention is suppressed using pass and connects two MgB with the powder sintered technique being combined2Superconducting wire, pass pressure
Mg-B mixed powders have higher consistency, while the joint area of two superconducting wires connected in rear joint position processed
Bond strength is higher, and joint area has certain bending resistance, can ensure that wire rod bears one in actual use
Lorentz force action during fixed applied mechanical power effect or low temperature excitation.
2nd, it is of the invention by two MgB2The joint area material of superconducting line is polished into tiltedly broken shape, ensure that to greatest extent
MgB2The contact area of superconduction powder, with reference to follow-up sintering Technology for Heating Processing, good superconduction connection can be formed in joint area
Performance, prepared MgB2The resistance of superconducting wire joint area is less than 1 × 10-10Ohm.
3rd, the present invention combines pass compacting and powder sintering process by two MgB2Superconducting wire links together, pass pressure
System makes joint area bond strength higher, at the same follow-up sintering heat treatment process can ensure to be formed in joint area it is good
MgB2Superconducting phase, so as to realize two MgB2The superconduction jointing of superconducting wire.It is single that the present invention can solve the problem that prepared by PIT techniques
The limitation of root length of wires, and then promote MgB2The practicalization of superconducting wire.
The present invention is described in further detail with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is the structural representation of present invention product to be pressed.
Description of reference numerals:
The MgB of 1-1-the first2Superconducting wire；The MgB of 1-2-the 2nd2Superconducting wire；
2-Mg-B mixed-powders；3-Nb paper tinsels；
4-Cu is managed.
Embodiment
Embodiment 1
The present embodiment MgB2The connection method of superconducting wire comprises the following steps：
Step 1: first, by the first MgB2Superconducting wire 1-1 end to be connected and the 2nd MgB2The superconducting wire 1-2 company for the treatment of
Connect end and carry out processing of sealing with wax, to prevent the MgB in wire rod2Precursor powder is by acid liquid corrosion；Then, by the first MgB2It is super
Wire material 1-1 and the 2nd MgB2Superconducting wire 1-2 is placed in carrying out pickling processes in salpeter solution, to remove the Cu bags of outside
Jacket layer, HNO in the salpeter solution3With H2O mol ratio is 1: 1.8；Afterwards, by the first MgB after pickling processes2Superconducting line
The 2nd MgB behind material 1-1 end to be connected and pickling processes2The superconducting wire 1-2 equal reconditioning in end to be connected is ramp-like, tiltedly
Angle of slope (horizontal plane and the angle of inclined plane) is 5 °；
Step 2: first, quality purity is not less than 99%, Mg powder of the granularity no more than 44 μm is not less than with quality purity
99%, the amorphous B powder that granularity is 0.3 μm~0.5 μm is well mixed at 1: 2 in molar ratio, obtains Mg-B mixed-powders 2, so
Afterwards, Mg-B mixed-powders 2 are uniformly coated with step 1 the first MgB after reconditioning2The end at superconducting wire 1-1 end to be connected
On face, afterwards, the first MgB of Mg-B mixed-powders 2 will be coated with2Superconducting wire 1-1 end to be connected and the MgB after reconditioning2It is super
Docked at the 1-2 of wire material two end to be connected；
Step 3: the Nb paper tinsels 3 that thickness is 0.15mm are coated on the first MgB described in step 22Superconducting wire 1-1 and
Two MgB2Outside superconducting wire 1-2, then Cu pipes 4 are set in outside Nb paper tinsels 3, obtain the product to be pressed (structure of the product to be pressed
As shown in Figure 1)；
Step 4: product to be pressed described in step 3 are fitted into orifice type dies, then by the pass equipped with product to be pressed
Mould is placed in hydraulic press, and product to be pressed are suppressed using hydraulic press, and it is 15MPa to control compacting pressure, and the press time is
60s, compacting product are obtained after the demoulding；
It is sintered Step 5: product will be suppressed described in step 4 and be placed in sintering furnace, it is 660 to control sintering temperature
DEG C, sintering time 2h, the MgB after being connected after natural cooling2Superconducting wire.
MgB after being connected to the present embodiment2The joint area of superconducting wire is detected, after measuring the present embodiment connection
MgB2The resistance of the joint area of superconducting wire is 8.5 × 10-12Ohm, it follows that the MgB after the present embodiment connects2It is super
Wire material, its joint area have good superconduction switching performance.
Embodiment 2
The present embodiment MgB2The connection method of superconducting wire comprises the following steps：
Step 1: first, by the first MgB2Superconducting wire 1-1 end to be connected and the 2nd MgB2The superconducting wire 1-2 company for the treatment of
Connect end and carry out processing of sealing with wax, to prevent the MgB in wire rod2Precursor powder is by acid liquid corrosion；Then, by the first MgB2It is super
Wire material 1-1 and the 2nd MgB2Superconducting wire 1-2 is placed in carrying out pickling processes in salpeter solution, to remove the Cu bags of outside
Jacket layer, HNO in the salpeter solution3With H2O mol ratio is 1: 1.6；Afterwards, by the first MgB after pickling processes2Superconducting line
The 2nd MgB behind material 1-1 end to be connected and pickling processes2The superconducting wire 1-2 equal reconditioning in end to be connected is ramp-like, tiltedly
Angle of slope (horizontal plane and the angle of inclined plane) is 10 °；
Step 2: first, quality purity is not less than 99%, Mg powder of the granularity no more than 44 μm is not less than with quality purity
99%, the amorphous B powder that granularity is 0.3 μm~0.5 μm is well mixed at 1.1: 2 in molar ratio, obtains Mg-B mixed-powders 2, so
Afterwards, Mg-B mixed-powders 2 are uniformly coated with step 1 the first MgB after reconditioning2The end at superconducting wire 1-1 end to be connected
On face, afterwards, the first MgB of Mg-B mixed-powders 2 will be coated with2Superconducting wire 1-1 end to be connected and the MgB after reconditioning2It is super
Docked at the 1-2 of wire material two end to be connected；
Step 3: the Nb paper tinsels 3 that thickness is 0.15mm are coated on the first MgB described in step 22Superconducting wire 1-1 and
Two MgB2Outside superconducting wire 1-2, then Cu pipes 4 are set in outside Nb paper tinsels 3, obtain the product to be pressed (structure of the product to be pressed
As shown in Figure 1)；
Step 4: product to be pressed described in step 3 are fitted into orifice type dies, then by the pass equipped with product to be pressed
Mould is placed in hydraulic press, and product to be pressed are suppressed using hydraulic press, and it is 10MPa to control compacting pressure, and the press time is
120s, compacting product are obtained after the demoulding；
It is sintered Step 5: product will be suppressed described in step 4 and be placed in sintering furnace, it is 670 to control sintering temperature
DEG C, sintering time 1.5h, the MgB after being connected after natural cooling2Superconducting wire.
MgB after being connected to the present embodiment2The joint area of superconducting wire is detected, after measuring the present embodiment connection
MgB2The resistance of the joint area of superconducting wire is 1.2 × 10-11Ohm, it follows that the MgB after the present embodiment connects2It is super
Wire material, its joint area have good superconduction switching performance.
Embodiment 3
The present embodiment MgB2The connection method of superconducting wire comprises the following steps：
Step 1: first, by the first MgB2Superconducting wire 1-1 end to be connected and the 2nd MgB2The superconducting wire 1-2 company for the treatment of
Connect end and carry out processing of sealing with wax, to prevent the MgB in wire rod2Precursor powder is by acid liquid corrosion；Then, by the first MgB2It is super
Wire material 1-1 and the 2nd MgB2Superconducting wire 1-2 is placed in carrying out pickling processes in salpeter solution, to remove the Cu bags of outside
Jacket layer, HNO in the salpeter solution3With H2O mol ratio is 1: 2；Afterwards, by the first MgB after pickling processes2Superconducting wire
The 2nd MgB behind 1-1 end to be connected and pickling processes2The superconducting wire 1-2 equal reconditioning in end to be connected is ramp-like, slope
Angle (horizontal plane and the angle of inclined plane) is 15 °；
Step 2: first, quality purity is not less than 99%, Mg powder of the granularity no more than 44 μm is not less than with quality purity
99%, the amorphous B powder that granularity is 0.3 μm~0.5 μm is well mixed at 1.1: 2 in molar ratio, obtains Mg-B mixed-powders 2, so
Afterwards, Mg-B mixed-powders 2 are uniformly coated with step 1 the first MgB after reconditioning2The end at superconducting wire 1-1 end to be connected
On face, afterwards, the first MgB of Mg-B mixed-powders 2 will be coated with2Superconducting wire 1-1 end to be connected and the MgB after reconditioning2It is super
Docked at the 1-2 of wire material two end to be connected；
Step 3: the Nb paper tinsels 3 that thickness is 0.1mm are coated on the first MgB described in step 22Superconducting wire 1-1 and
Two MgB2Outside superconducting wire 1-2, then Cu pipes 4 are set in outside Nb paper tinsels 3, obtain the product to be pressed (structure of the product to be pressed
As shown in Figure 1)；
Step 4: product to be pressed described in step 3 are fitted into orifice type dies, then by the pass equipped with product to be pressed
Mould is placed in hydraulic press, and product to be pressed are suppressed using hydraulic press, and it is 20MPa to control compacting pressure, and the press time is
30s, compacting product are obtained after the demoulding；
It is sintered Step 5: product will be suppressed described in step 4 and be placed in sintering furnace, it is 670 to control sintering temperature
DEG C, sintering time 1.5h, the MgB after being connected after natural cooling2Superconducting wire.
MgB after being connected to the present embodiment2The joint area of superconducting wire is detected, after measuring the present embodiment connection
MgB2The resistance of the joint area of superconducting wire is 1.5 × 10-11Ohm, it follows that the MgB after the present embodiment connects2It is super
Wire material, its joint area have good superconduction switching performance.
Embodiment 4
The present embodiment MgB2The connection method of superconducting wire comprises the following steps：
Step 1: first, by the first MgB2Superconducting wire 1-1 end to be connected and the 2nd MgB2The superconducting wire 1-2 company for the treatment of
Connect end and carry out processing of sealing with wax, to prevent the MgB in wire rod2Precursor powder is by acid liquid corrosion；Then, by the first MgB2It is super
Wire material 1-1 and the 2nd MgB2Superconducting wire 1-2 is placed in carrying out pickling processes in salpeter solution, to remove the Cu bags of outside
Jacket layer, HNO in the salpeter solution3With H2O mol ratio is 1: 1.5；Afterwards, by the first MgB after pickling processes2Superconducting line
The 2nd MgB behind material 1-1 end to be connected and pickling processes2The superconducting wire 1-2 equal reconditioning in end to be connected is ramp-like, tiltedly
Angle of slope (horizontal plane and the angle of inclined plane) is 30 °；
Step 2: first, quality purity is not less than 99%, Mg powder of the granularity no more than 44 μm is not less than with quality purity
99%, the amorphous B powder that granularity is 0.3 μm~0.5 μm is well mixed at 1: 2 in molar ratio, obtains Mg-B mixed-powders 2, so
Afterwards, Mg-B mixed-powders 2 are uniformly coated with step 1 the first MgB after reconditioning2The end at superconducting wire 1-1 end to be connected
On face, afterwards, the first MgB of Mg-B mixed-powders 2 will be coated with2Superconducting wire 1-1 end to be connected and the MgB after reconditioning2It is super
Docked at the 1-2 of wire material two end to be connected；
Step 3: the Nb paper tinsels 3 that thickness is 0.05mm are coated on the first MgB described in step 22Superconducting wire 1-1 and
Two MgB2Outside superconducting wire 1-2, then Cu pipes 4 are set in outside Nb paper tinsels 3, obtain the product to be pressed (structure of the product to be pressed
As shown in Figure 1)；
Step 4: product to be pressed described in step 3 are fitted into orifice type dies, then by the pass equipped with product to be pressed
Mould is placed in hydraulic press, and product to be pressed are suppressed using hydraulic press, and it is 20MPa to control compacting pressure, and the press time is
30s, compacting product are obtained after the demoulding；
It is sintered Step 5: product will be suppressed described in step 4 and be placed in sintering furnace, it is 670 to control sintering temperature
DEG C, sintering time 1.5h, the MgB after being connected after natural cooling2Superconducting wire.
MgB after being connected to the present embodiment2The joint area of superconducting wire is detected, after measuring the present embodiment connection
MgB2The resistance of the joint area of superconducting wire is 1.8 × 10-11Ohm, it follows that the MgB after the present embodiment connects2It is super
Wire material, its joint area have good superconduction switching performance.
Embodiment 5
The present embodiment MgB2The connection method of superconducting wire comprises the following steps：
Step 1: first, by the first MgB2Superconducting wire 1-1 end to be connected and the 2nd MgB2The superconducting wire 1-2 company for the treatment of
Connect end and carry out processing of sealing with wax, to prevent the MgB in wire rod2Precursor powder is by acid liquid corrosion；Then, by the first MgB2It is super
Wire material 1-1 and the 2nd MgB2Superconducting wire 1-2 is placed in carrying out pickling processes in salpeter solution, to remove the Cu bags of outside
Jacket layer, HNO in the salpeter solution3With H2O mol ratio is 1: 1.5；Afterwards, by the first MgB after pickling processes2Superconducting line
The 2nd MgB behind material 1-1 end to be connected and pickling processes2The superconducting wire 1-2 equal reconditioning in end to be connected is ramp-like, tiltedly
Angle of slope (horizontal plane and the angle of inclined plane) is 25 °；
Step 2: first, quality purity is not less than 99%, Mg powder of the granularity no more than 44 μm is not less than with quality purity
99%, the amorphous B powder that granularity is 0.3 μm~0.5 μm is well mixed at 1.1: 2 in molar ratio, obtains Mg-B mixed-powders 2, so
Afterwards, Mg-B mixed-powders 2 are uniformly coated with step 1 the first MgB after reconditioning2The end at superconducting wire 1-1 end to be connected
On face, afterwards, the first MgB of Mg-B mixed-powders 2 will be coated with2Superconducting wire 1-1 end to be connected and the MgB after reconditioning2It is super
Docked at the 1-2 of wire material two end to be connected；
Step 3: the Nb paper tinsels 3 that thickness is 0.05mm are coated on the first MgB described in step 22Superconducting wire 1-1 and
Two MgB2Outside superconducting wire 1-2, then Cu pipes 4 are set in outside Nb paper tinsels 3, obtain the product to be pressed (structure of the product to be pressed
As shown in Figure 1)；
Step 4: product to be pressed described in step 3 are fitted into orifice type dies, then by the pass equipped with product to be pressed
Mould is placed in hydraulic press, and product to be pressed are suppressed using hydraulic press, and it is 10MPa to control compacting pressure, and the press time is
120s, compacting product are obtained after the demoulding；
It is sintered Step 5: product will be suppressed described in step 4 and be placed in sintering furnace, it is 680 to control sintering temperature
DEG C, sintering time 1h, the MgB after being connected after natural cooling2Superconducting wire.
MgB after being connected to the present embodiment2The joint area of superconducting wire is detected, after measuring the present embodiment connection
MgB2The resistance of the joint area of superconducting wire is 2.3 × 10-11Ohm, it follows that the MgB after the present embodiment connects2It is super
Wire material, its joint area have good superconduction switching performance.
It is described above, only it is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions.It is every according to invention skill
Any simple modification, change and equivalence change that art is substantially made to above example, still fall within technical solution of the present invention
Protection domain in.
Claims (8)
- A kind of 1. MgB2The connection method of superconducting wire, it is characterised in that this method comprises the following steps：Step 1: respectively to the first MgB2Superconducting wire (1-1) and the 2nd MgB2Superconducting wire (1-2) carries out pickling processes, then By the first MgB after pickling processes2The 2nd MgB behind the end to be connected of superconducting wire (1-1) and pickling processes2Superconducting wire (1- 2) the equal reconditioning in end to be connected is ramp-like；Step 2: the first MgB in step 1 after reconditioning2Mg-B mixing is coated with the end end face to be connected of superconducting wire (1-1) Powder (2), it then will be coated with the first MgB of Mg-B mixed-powders (2)2Behind the end to be connected of superconducting wire (1-1) and reconditioning The 2nd MgB2Docked at the end to be connected of superconducting wire (1-2)；The Mg-B mixed-powders (2) are by Mg powder and amorphous B Powder is in molar ratio (1.0~1.1): 2 well mixed form；Step 3: Nb paper tinsels (3) are coated on the first MgB after being docked in step 22Superconducting wire (1-1) and the 2nd MgB2Superconduction Cu outside, is then managed (4) and is set in the Nb paper tinsels (3) outside, obtain product to be pressed by wire rod (1-2)；Step 4: product to be pressed described in step 3 are fitted into orifice type dies, then by the orifice type dies equipped with product to be pressed It is placed in hydraulic press, compacting product is obtained after compacting, the demoulding；It is sintered Step 5: product will be suppressed described in step 4 and be placed in sintering furnace, after obtaining connection after natural cooling MgB2Superconducting wire.
- A kind of 2. MgB according to claim 12The connection method of superconducting wire, it is characterised in that sour described in step 1 The acid solution for washing processing is salpeter solution, HNO in the salpeter solution3With H2O mol ratio is 1: (1.5~2).
- A kind of 3. MgB according to claim 12The connection method of superconducting wire, it is characterised in that to first in step 1 MgB2Superconducting wire (1-1) and the 2nd MgB2Before superconducting wire (1-2) carries out pickling processes, in advance to the first MgB2Superconducting line The end to be connected of material (1-1) and the 2nd MgB2The end to be connected of superconducting wire (1-2), which carries out sealing with wax, to be handled to prevent that acid solution is rotten Erosion.
- A kind of 4. MgB according to claim 12The connection method of superconducting wire, it is characterised in that Mg described in step 2 The quality purity of powder is not less than 99%, and the granularity of the Mg powder is not more than 44 μm.
- A kind of 5. MgB according to claim 12The connection method of superconducting wire, it is characterised in that nothing described in step 2 The quality purity of setting B powder is not less than 99%, and the granularity of the amorphous B powder is 0.3 μm~0.5 μm.
- A kind of 6. MgB according to claim 12The connection method of superconducting wire, it is characterised in that Nb described in step 3 The thickness of paper tinsel (3) is 0.05mm~0.2mm.
- A kind of 7. MgB according to claim 12The connection method of superconducting wire, it is characterised in that pressed described in step 4 The pressure of system is 10MPa~20MPa, and the time of the compacting is 30s~120s.
- A kind of 8. MgB according to claim 12The connection method of superconducting wire, it is characterised in that burnt described in step 5 The temperature of knot processing is 660 DEG C~680 DEG C, and the time of the sintering processes is 1h~2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510513921.2A CN105048237B (en) | 2015-08-20 | 2015-08-20 | A kind of MgB2The connection method of superconducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510513921.2A CN105048237B (en) | 2015-08-20 | 2015-08-20 | A kind of MgB2The connection method of superconducting wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105048237A CN105048237A (en) | 2015-11-11 |
| CN105048237B true CN105048237B (en) | 2018-04-10 |
Family
ID=54454572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510513921.2A Active CN105048237B (en) | 2015-08-20 | 2015-08-20 | A kind of MgB2The connection method of superconducting wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105048237B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105355357B (en) * | 2015-11-17 | 2017-08-25 | 中国科学院电工研究所 | A kind of Fe-base compound superconducting joint and preparation method thereof |
| CN107863613A (en) * | 2017-09-29 | 2018-03-30 | 中国科学院电工研究所 | A kind of superconducting joint and preparation method thereof |
| CN110265845B (en) * | 2019-06-19 | 2020-07-14 | 东部超导科技（苏州）有限公司 | Superconducting cable connection method based on YBCO superconducting material |
| CN113036470B (en) * | 2021-03-17 | 2022-11-29 | 西部超导材料科技股份有限公司 | MgB2 superconducting cable joint and preparation and connection method thereof |
| CN113471723B (en) * | 2021-06-28 | 2023-07-04 | 国网上海市电力公司 | Joint structure of superconducting square fine wire and manufacturing method |
| CN113571995B (en) * | 2021-07-09 | 2022-03-25 | 北京大学 | MgB2Method for manufacturing superconducting joint |
| CN118198754B (en) * | 2024-05-20 | 2024-08-09 | 山东奥新医疗科技有限公司 | Magnesium diboride superconducting joint and manufacturing device thereof |
| CN118508192B (en) * | 2024-07-18 | 2024-09-24 | 西北工业大学 | In-situ connection method of powder method superconducting wire |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0695471B2 (en) * | 1987-04-15 | 1994-11-24 | 住友電気工業株式会社 | How to connect superconductors |
| JPH03250567A (en) * | 1990-02-27 | 1991-11-08 | Sumitomo Heavy Ind Ltd | Structure and method for connection of superconducting wire |
| JP3107320B2 (en) * | 1991-10-24 | 2000-11-06 | 日立電線株式会社 | Superconducting wire connection method |
| CN101291021B (en) * | 2007-11-16 | 2011-04-20 | 中国科学院电工研究所 | Connecting method of MgB* superconduction in strip shape |
| DE102009022672A1 (en) * | 2009-05-26 | 2010-12-02 | Siemens Aktiengesellschaft | Superconductive connection device of the end pieces of two superconductors and method for their production |
| CN101872661B (en) * | 2010-05-21 | 2012-09-05 | 西北有色金属研究院 | Method for preparing naphthalene-doped MgB2 superconductive single-core wire |
| CN102623167B (en) * | 2012-03-30 | 2014-03-26 | 宁波健信机械有限公司 | Method for manufacturing closed loop superconducting coil by using magnesium diboride and closed loop superconducting coil |
-
2015
- 2015-08-20 CN CN201510513921.2A patent/CN105048237B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105048237A (en) | 2015-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105048237B (en) | A kind of MgB2The connection method of superconducting wire | |
| JP4481584B2 (en) | Composite sheath MgB2 superconducting wire and method for manufacturing the same | |
| CN102522153B (en) | Preparation method of multi-core MgB2 superconducting wire | |
| CN108682509B (en) | Method for preparing iron-based superconducting composite strip | |
| CN102693785A (en) | Preparation method for multi-core MgB2/Fe/Cu superconducting wire | |
| CN103236322A (en) | Preparation method of rectangular 7-core MgB2 superconducting strip | |
| CN105845278A (en) | Manufacturing method for practical multi-core MgB2 composite superconductive wire rods | |
| CN106601366A (en) | Manufacturing method of 122 type iron-based compound superconducting wire or belt material | |
| CN105390830B (en) | Realize the method and structure that superconduction connects between RE, Ba and Cu oxide high temperature super conductive conductor | |
| CN101291021A (en) | Connecting method of MgB* superconduction in strip shape | |
| KR100860960B1 (en) | Method for manufacturing mgb2 superconducting wire | |
| CN103924108B (en) | A kind of nonmagnetic strong cubic texture copper base alloy composite baseband and preparation method thereof | |
| CN103928192B (en) | A kind of large scale MgB 2the preparation method of single-core superconducting wire material | |
| CN208570204U (en) | A kind of superconducting tape encapsulating structure | |
| CN105869781B (en) | A kind of preparation method of FeSe bases superconducting wire | |
| EP1429399A2 (en) | Superconducting wire rod and method of producing the same | |
| CN111243820B (en) | Bronze process Nb3Sn superconducting wire joint and preparation method thereof | |
| CN102699099A (en) | Preparation method of Cu-Nb-Ag ternary multi-core composite wire | |
| CN104217817B (en) | Preparation (Ba/Sr)1-xkxfe2as2superconducting wire or the method for band | |
| US8914087B1 (en) | Joints with very low resistance between superconducting wires and methods for making such joints | |
| CN105869777A (en) | Preparation method of Bi-2223 superconducting tape | |
| CN103151110A (en) | 7-core kilometric MgB2/Nb/Cu superconducting wire and preparation method thereof | |
| CN103093899B (en) | Nb 3the preparation method of Al superconducting wire split conductor presoma | |
| CN103956222A (en) | Method for preparing six-core MgB2 superconducting wire by magnesium diffusion method | |
| CN1687998A (en) | Superconductive cable assembly and preparing process thereof |
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 |