CN101923923A - Laminar structured bismuth-system high temperature superconducting tape and preparation method thereof - Google Patents
Laminar structured bismuth-system high temperature superconducting tape and preparation method thereof Download PDFInfo
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- CN101923923A CN101923923A CN2010102810151A CN201010281015A CN101923923A CN 101923923 A CN101923923 A CN 101923923A CN 2010102810151 A CN2010102810151 A CN 2010102810151A CN 201010281015 A CN201010281015 A CN 201010281015A CN 101923923 A CN101923923 A CN 101923923A
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- silver
- silver alloy
- bismuth
- based high
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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Abstract
The invention relates to a laminar structured bismuth-system high temperature superconducting tape and a preparation method thereof. The tape is prepared by alternately arranging Bi-Sr-Ca-Cu-oxygen-system superconducting powder sheets, silver or silver alloy sheets and coating silver or silver alloy on the outermost layer. The preparation method has the advantages of simple production process and easy large-scale production; and the tape has large contact area with silver and superconducting powder, and the electrical performance of the tape can be obviously improved.
Description
Technical field
The present invention relates to the preparation technology of superconductor, particularly be a kind of silver or silver alloy film and supercondutive powder sheet Bi-based high-temperature superconductive strip alternately and preparation method thereof.
Background technology
Bi-based high-temperature superconductive strip is at present unique also high temperature superconducting materia of large-scale application of commercially producing, and generally takes powder-in-tube technique to prepare Bi-based high-temperature superconductive strip in producing at present.This method is the general matrix that adopts silver or silver alloy as superconductivity wire in practical operation, thereby supercondutive powder is placed on silver or silver alloy sleeve pipe lira pulls out, rolling and heat treatment obtains operable superconducting tape.In general, the electric property of the many more bands of superconducting core number is good more in this type of art production process, this mainly is because supercurrent is transmitted from the interface of silver and supercondutive powder, and the core number is many more, thereby silver is better with the big more electric property of band that causes of supercondutive powder contact area.
Except increasing the core number, also have to adopt the method that is equipped with superconducting tape behind the silver-colored particle with the PIT legal system with mixing in the supercondutive powder, this method silver particle can form banded structure after through machine work and heat treatment, increased the contact area of supercondutive powder with silver, thereby has improved the electric property of band; Also have to adopt the method for adding forerunner's powder in addition, to increase the contact area of silver and supercondutive powder by between the core of multicore band and core.
Though said method can improve the electric property of Bi-based high-temperature superconductive strip, increase rate is also little, can not more improve the contact area of silver and supercondutive powder, can not be applied in the actual industrial production.
So the contact area of taking effective ways to improve silver and supercondutive powder has very important meaning to the electric property that improves band.
Summary of the invention
The purpose of this invention is to provide a kind of laminar structured Bi-based high-temperature superconductive strip and preparation method.Preparation technology of the present invention is very simple, but is easy to realize that also large-scale application arrives commodity production, band of the present invention, and silver is bigger with the supercondutive powder contact area, can significantly improve the electric property of band.
Technical scheme of the present invention is laminar structured Bi-based high-temperature superconductive strip, the structure of described band be bismuth-strontium-calcium-copper-oxygen series superconductive powder sheet, silver or silver alloy film alternately, outermost layer parcel silver or silver alloy.
The length of described bismuth-strontium-calcium-copper-oxygen series superconductive powder sheet and width equate with the length and the width of silver or silver alloy film.
The thickness of described bismuth-strontium-calcium-copper-oxygen series superconductive powder sheet equates with the thickness of silver or silver alloy film or is unequal.
The preparation method of Bi-based high-temperature superconductive strip is characterized in that following steps are arranged:
1) be pressed into the bismuth-strontium-calcium-copper-oxygen series superconductive powder laminar;
2) silver or silver alloy are rolled into laminar;
3) some supercondutive powder sheets and silver or silver alloy film are stacked alternately, put into cuboid silver or silver alloy pipe;
4) it is rolling that the pipe that step 3) is obtained carries out multi-pass;
5) be 700～840 ℃ with the band after rolling in temperature, partial pressure of oxygen is to be incubated heat treatment under 1～150 hour condition under the condition of 0.01～0.21atm, can prepare laminar structured Bi-based high-temperature superconductive strip.
Rolling total deformation described in the step 5) is 20%～95%.
The band that adopts the inventive method to prepare can significantly improve the contact area of silver and supercondutive powder, thereby has improved the electric property of Bi-based high-temperature superconductive strip.Production technology of the present invention is simple, is easy to be used for industrial production.
The present invention is applicable to the preparation of Bi-based high-temperature superconductive strip.
Forerunner's powder that bismuth-strontium-calcium-copper-oxygen series superconductive powder of the present invention is produced for Merck company.
Description of drawings
Below in conjunction with accompanying drawing instantiation of the present invention is described in detail, wherein:
Fig. 1 is a cross sectional representation in the sheet Bi-based high-temperature superconductive strip preparation process;
Fig. 2 is sheet Bi-based high-temperature superconductive strip preparation flow figure.
Among the figure, 1 is silver strip or silver alloy film, and 2 for bismuth is a supercondutive powder, and 3 is hollow silver pipe or silver alloy pipe.
Embodiment
Embodiment 1
Four layers of Bi2223/Ag superconducting tape
With press with the compacting of bismuth-strontium-calcium-copper-oxygen series superconductive powder in flakes, its length is that 10mm, wide 3mm, thickness are 0.5mm, suppresses four sheets altogether; With milling train that silver or silver alloy is rolling in flakes, length is 10mm, wide 3mm, thickness 1mm, suppresses three; With supercondutive powder sheet and silver or silver alloy film is alternate stacks, wherein the supercondutive powder sheet is positioned at the superiors, and silver or silver alloy film are positioned at orlop.The material that stacks is put in the silver or silver alloy cuboid pipe that length is 10mm, wide 5.5mm, high 7.5mm, wall thickness 1mm, with the rolling thickness that obtains of cuboid pipe is that 0.3mm, width are the long band of 4mm, it is 840 ℃ in temperature subsequently, temperature retention time is 100h, partial pressure of oxygen is heat treatment under the condition of 0.10atm, prepares the Bi-2223 band of sheet.Measure through the applicant, its critical current of Bi-2223 band of the inventive method preparation has good electric property.
Embodiment 2
Six layers of Bi2223/Ag superconducting tape
With press with the compacting of bismuth-strontium-calcium-copper-oxygen series superconductive powder in flakes, its length is that 10mm, wide 3mm, thickness are 0.25mm, suppresses six altogether; With milling train that silver alloy is rolling in flakes, length is 10mm, wide 3mm, thickness 0.5mm, suppresses five; Be stacked together the supercondutive powder sheet is alternate with silver strip, wherein the supercondutive powder sheet is positioned at the superiors, and silver strip is positioned at orlop.The material that stacks is put in the silver or silver alloy cuboid pipe that length is 10mm, wide 5.5mm, high 6.5mm, wall thickness 1mm, with silver or the rolling thickness that obtains of silver alloy cuboid pipe is that 0.35mm, width are the long band of 4mm, it is 830 ℃ in temperature subsequently, temperature retention time is 100h, partial pressure of oxygen is heat treatment under the condition of 0.08atm, prepares the Bi2223/Ag band of sheet.Measure through the applicant, its critical current of Bi-2223 band of the inventive method preparation has good electric property.
Claims (5)
1. laminar structured Bi-based high-temperature superconductive strip is characterized in that: the structure of described band be bismuth-strontium-calcium-copper-oxygen series superconductive powder sheet, silver or silver alloy film alternately, outermost layer parcel silver or silver alloy.
2. laminar structured Bi-based high-temperature superconductive strip according to claim 1 is characterized in that: the length of described bismuth-strontium-calcium-copper-oxygen series superconductive powder sheet and width equate with the length and the width of silver or silver alloy film.
3. laminar structured Bi-based high-temperature superconductive strip according to claim 1 is characterized in that: the thickness of described bismuth-strontium-calcium-copper-oxygen series superconductive powder sheet equates with the thickness of silver or silver alloy film or is unequal.
4. the preparation method of the described laminar structured Bi-based high-temperature superconductive strip of claim 1 is characterized in that following steps are arranged:
1) be pressed into the bismuth-strontium-calcium-copper-oxygen series superconductive powder laminar;
2) silver or silver alloy are rolled into laminar;
3) some supercondutive powder sheets and silver or silver alloy film are stacked alternately, put into cuboid silver or silver alloy pipe;
4) it is rolling that the pipe that step 3) is obtained carries out multi-pass;
5) be 700～840 ℃ with the band after rolling in temperature, partial pressure of oxygen is to be incubated heat treatment under 1～150 hour condition under the condition of 0.01～0.21atm, can prepare laminar structured Bi-based high-temperature superconductive strip.
5. method according to claim 4 is characterized in that: the rolling total deformation described in the step 5) is 20%～95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102810151A CN101923923A (en) | 2010-09-14 | 2010-09-14 | Laminar structured bismuth-system high temperature superconducting tape and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102810151A CN101923923A (en) | 2010-09-14 | 2010-09-14 | Laminar structured bismuth-system high temperature superconducting tape and preparation method thereof |
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| CN101923923A true CN101923923A (en) | 2010-12-22 |
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| CN2010102810151A Pending CN101923923A (en) | 2010-09-14 | 2010-09-14 | Laminar structured bismuth-system high temperature superconducting tape and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06209182A (en) * | 1991-11-21 | 1994-07-26 | Mitsui Mining & Smelting Co Ltd | Superconducting magnetic shield container and its manufacture |
| JPH1125771A (en) * | 1997-07-07 | 1999-01-29 | Agency Of Ind Science & Technol | Oxide superconducting tape material and its manufacture |
| US5999833A (en) * | 1997-02-04 | 1999-12-07 | Agency Of Industrial Science & Technology, Ministry Of International Trade & Industry | Method for production of superconducting oxide tape and superconducting oxide tape produced thereby |
| JP2000348546A (en) * | 1999-06-04 | 2000-12-15 | Showa Electric Wire & Cable Co Ltd | Oxide superconducting wire and manufacture thereof |
| JP2001332142A (en) * | 2000-05-25 | 2001-11-30 | Showa Electric Wire & Cable Co Ltd | Oxide superconducting wire rod and its manufacturing method |
-
2010
- 2010-09-14 CN CN2010102810151A patent/CN101923923A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06209182A (en) * | 1991-11-21 | 1994-07-26 | Mitsui Mining & Smelting Co Ltd | Superconducting magnetic shield container and its manufacture |
| US5999833A (en) * | 1997-02-04 | 1999-12-07 | Agency Of Industrial Science & Technology, Ministry Of International Trade & Industry | Method for production of superconducting oxide tape and superconducting oxide tape produced thereby |
| JPH1125771A (en) * | 1997-07-07 | 1999-01-29 | Agency Of Ind Science & Technol | Oxide superconducting tape material and its manufacture |
| JP2000348546A (en) * | 1999-06-04 | 2000-12-15 | Showa Electric Wire & Cable Co Ltd | Oxide superconducting wire and manufacture thereof |
| JP2001332142A (en) * | 2000-05-25 | 2001-11-30 | Showa Electric Wire & Cable Co Ltd | Oxide superconducting wire rod and its manufacturing method |
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Open date: 20101222 |