WO1993002460A1 - Method for manufacturing superconductive wire material of bismuth based oxide - Google Patents
Method for manufacturing superconductive wire material of bismuth based oxide Download PDFInfo
- Publication number
- WO1993002460A1 WO1993002460A1 PCT/JP1992/000935 JP9200935W WO9302460A1 WO 1993002460 A1 WO1993002460 A1 WO 1993002460A1 JP 9200935 W JP9200935 W JP 9200935W WO 9302460 A1 WO9302460 A1 WO 9302460A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- based oxide
- phase
- bismuth
- powder
- heat treatment
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
- H10N60/0801—Manufacture or treatment of filaments or composite wires
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49014—Superconductor
Definitions
- the present invention relates to a method for producing a bismuth-based oxide superconducting wire, and in particular, a bismuth-based oxide superconductor or a raw material thereof is filled in a metal sheath, and the metal sheath is then plastically processed into a wire.
- the present invention relates to a method for producing a bismuth-based oxide superconducting wire further comprising a heat treatment step.
- bismuth-based oxide superconducting materials have a high critical temperature of about 110K. It is known that a high critical current density can be obtained by metal-coating such a bismuth-based oxide superconducting material, plastic working in that state, processing into a thin tape shape, and then heat treatment. In particular, it has been found that the critical current density can be further increased by repeating plastic working and heat treatment several times.
- bismuth-based oxide superconductors include those having a critical temperature of 110 K and those having a critical temperature of 80 K and 10 K. It is also known that a non-superconducting phase appears in a part when producing a 110 K-phase superconductor.
- the 10 K phase is given by the 222 3 phase, in which the composition ratio of B i or (B i, P b): S r: C a: C u is approximately 2: 2: 2: 3; It is known that the 0 K phase is provided by a 221 2 phase in which this composition ratio is approximately 2: 2: 1: 2.
- an object of the present invention is to provide a method for producing a bismuth-based oxide superconducting wire capable of obtaining a high critical current density and a high critical current in a high magnetic field.
- the present invention uses a composition in which the composition that can be the pinning point to be introduced is increased from the composition as close as possible to the 2223 phase, which is the 110 K phase, and the 110 K phase is used.
- the composition that can be the pinning point to be introduced is increased from the composition as close as possible to the 2223 phase, which is the 110 K phase, and the 110 K phase is used.
- non-superconducting phases that do not adversely affect the 110 K phase are introduced as much as possible, and this non-superconducting phase is intended to provide high pinning power.
- the present invention fills a metal sheath with a powder of a bismuth-based oxide superconductor containing Bi, Pb, Sr, Ca and Cu or a raw material thereof, and fills the metal sheath with the powder.
- the metal sheath is plastically processed into a wire, and then the primary heat
- the present invention is directed to a method for producing a bismuth-based oxide superconducting wire, which comprises the steps of treating, plastic working or pressing, and further performing a second heat treatment, and solving the above-mentioned technical problems. It is characterized by having the following configuration.
- a powder having a composition in which Sr, Ca, and Cu are increased so that the Sr—Ca—Cu—0 phase is finally precipitated is used.
- Nonsuperconducting precipitated phases (C a 0 8, S r Q, 2). C u 0 3 ,
- the total time of the primary heat treatment and the secondary heat treatment is 100 to 300 hours, and the powder filled in the metal sheath has a maximum particle size of 2.0 m or less, and an average particle size of 2.0 m or less.
- the diameter should be less than 1.0 m.
- the bismuth-based oxide superconductor or its raw material used in the present invention is generally a polycrystal, and is composed of an aggregate of a superconducting phase and a non-superconducting phase.
- the material of the metal sheath used in the present invention does not react with the bismuth-based oxide superconductor and has a low resistance. It is preferable to use an anti-metal or alloy, and examples thereof include silver or a silver alloy.
- the filling powder used in the present invention generates a 110 K phase by heat treatment, and disperses a non-superconducting phase, mainly a Ca—Sr—Cu—0 system phase, in the 110 K phase. Let them act as pinning points.
- the Bi-based superconductor is composed of five elements, and there are many types of such different phases. The inventor independently investigated the composition of the different phases and found that , (C a 0 8, S r 0 2) 2 C u 0 3, with (C a 0 5, S r 0.
- the critical current density of a wire with a pinning point introduced in a high magnetic field is improved.
- these pinning points are small, the effect is small, and if they are too large, the path of the superconducting current becomes small, and conversely, the critical current decreases.
- FIG. 1 shows a magnetic field characteristic of a critical current density of each wire obtained by an experimental example implemented according to the present invention.
- the above-mentioned mixed powder is subjected to a heat treatment at 800 ° C. for 20 hours, then crushed, and then subjected to a heat treatment at 860 ° C. for 2 hours to obtain a filling powder.
- This powder was pulverized so that the maximum particle size was 2.0111 and the average particle size was 1.0 // m.
- the powder thus obtained was filled into a silver pipe having an outer diameter of 6.0 mm and an inner diameter of 4.0 mm, and was then drawn to a diameter of 1.0 mm. It was rolled to 0.17mm and pressed. Then, as a primary heat treatment, a heat treatment was performed at 845 for 150 hours, then pressed again, and then as a secondary heat treatment, a heat treatment was performed at 840 for 50 hours. .
- J c -B characteristics as shown in FIG. 1 were obtained.
- the horizontal axis shows the applied magnetic field
- the vertical axis shows the measured value of Jc normalized by Jc0 in zero magnetic field.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Wire Processing (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE69208856T DE69208856T2 (de) | 1991-07-24 | 1992-07-22 | Herstellungsverfahren eines bismutoxyd enthaltenden supraleitenden drahtmaterials |
| EP92916222A EP0551523B1 (en) | 1991-07-24 | 1992-07-22 | Method for manufacturing superconductive wire based on bismuth oxide superconducting material |
| US08/345,920 US5552376A (en) | 1991-07-24 | 1994-11-28 | Method of preparing bismuth oxide superconducting wire |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3184303A JPH0536317A (ja) | 1991-07-24 | 1991-07-24 | ビスマス系酸化物超電導線材の製造方法 |
| JP3/184303 | 1991-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993002460A1 true WO1993002460A1 (en) | 1993-02-04 |
Family
ID=16150977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1992/000935 Ceased WO1993002460A1 (en) | 1991-07-24 | 1992-07-22 | Method for manufacturing superconductive wire material of bismuth based oxide |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5552376A (ja) |
| EP (1) | EP0551523B1 (ja) |
| JP (1) | JPH0536317A (ja) |
| AU (1) | AU646971B2 (ja) |
| CA (1) | CA2092180C (ja) |
| DE (1) | DE69208856T2 (ja) |
| WO (1) | WO1993002460A1 (ja) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07282659A (ja) * | 1994-04-07 | 1995-10-27 | Sumitomo Electric Ind Ltd | 高温超電導線材の製造方法 |
| US6295716B1 (en) | 1994-10-28 | 2001-10-02 | American Superconductor Corporation | Production and processing of (Bi,Pb) SCCO superconductors |
| US6311386B1 (en) | 1994-10-28 | 2001-11-06 | American Superconductor Corporation | Processing of (Bi,Pb)SCCO superconductor in wires and tapes |
| US5942466A (en) * | 1994-10-28 | 1999-08-24 | American Superconductor Corporation | Processing of (Bi,Pb) SCCO superconductor in wires and tapes |
| US6247224B1 (en) | 1995-06-06 | 2001-06-19 | American Superconductor Corporation | Simplified deformation-sintering process for oxide superconducting articles |
| US6069116A (en) | 1997-09-10 | 2000-05-30 | American Superconductor Corp. | Method of forming BSCCO superconducting composite articles |
| US6195870B1 (en) * | 1998-02-13 | 2001-03-06 | The Regents Of The University Of California | Compressive annealing of superconductive tapes |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0356969A2 (en) * | 1988-08-29 | 1990-03-07 | Sumitomo Electric Industries, Ltd. | Method of producing oxide superconductor |
| EP0379960A2 (en) * | 1989-01-21 | 1990-08-01 | Sumitomo Electric Industries, Ltd. | Method of producing a superconducting Bi-based oxide wire |
| JPH03216917A (ja) * | 1990-01-19 | 1991-09-24 | Sumitomo Electric Ind Ltd | 超電導線材の製造方法 |
| EP0447994A2 (en) * | 1990-03-16 | 1991-09-25 | Sumitomo Electric Industries, Ltd. | Bismuth oxide superconductor and method of preparing the same |
| EP0449161A2 (en) * | 1990-03-26 | 1991-10-02 | Sumitomo Electric Industries, Ltd. | Method of preparing bismuth oxide superconductor |
| EP0450443A1 (en) * | 1990-04-02 | 1991-10-09 | General Electric Company | Preparation of tape of silver covered Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconductor |
| JPH041002A (ja) * | 1990-04-18 | 1992-01-06 | Sumitomo Electric Ind Ltd | 酸化物超電導体の製造方法 |
| JPH0412413A (ja) * | 1990-04-28 | 1992-01-17 | Sumitomo Electric Ind Ltd | ビスマス系酸化物超電導体の製造方法 |
| EP0467238A1 (en) * | 1990-07-16 | 1992-01-22 | Sumitomo Electric Industries, Limited | Method of preparing bismuth superconductor |
| EP0470595A1 (en) * | 1990-08-08 | 1992-02-12 | Sumitomo Electric Industries, Limited | Method of preparing bismuth oxide superconductor |
| JPH0448518A (ja) * | 1990-06-15 | 1992-02-18 | Sumitomo Electric Ind Ltd | ビスマス系超電導導体の製造方法 |
| JPH0465034A (ja) * | 1990-07-02 | 1992-03-02 | Mitsubishi Electric Corp | 酸化物超電導線材の製造方法 |
| JPH04123718A (ja) * | 1990-09-14 | 1992-04-23 | Sumitomo Electric Ind Ltd | 超電導線材の製造方法 |
| JPH04237910A (ja) * | 1991-01-19 | 1992-08-26 | Sumitomo Electric Ind Ltd | ビスマス系酸化物超電導線材の製造方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2636049B2 (ja) * | 1988-08-29 | 1997-07-30 | 住友電気工業株式会社 | 酸化物超電導体の製造方法および酸化物超電導線材の製造方法 |
-
1991
- 1991-07-24 JP JP3184303A patent/JPH0536317A/ja active Pending
-
1992
- 1992-07-22 AU AU23459/92A patent/AU646971B2/en not_active Expired
- 1992-07-22 EP EP92916222A patent/EP0551523B1/en not_active Expired - Lifetime
- 1992-07-22 DE DE69208856T patent/DE69208856T2/de not_active Expired - Lifetime
- 1992-07-22 CA CA002092180A patent/CA2092180C/en not_active Expired - Lifetime
- 1992-07-22 WO PCT/JP1992/000935 patent/WO1993002460A1/ja not_active Ceased
-
1994
- 1994-11-28 US US08/345,920 patent/US5552376A/en not_active Expired - Lifetime
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0356969A2 (en) * | 1988-08-29 | 1990-03-07 | Sumitomo Electric Industries, Ltd. | Method of producing oxide superconductor |
| EP0379960A2 (en) * | 1989-01-21 | 1990-08-01 | Sumitomo Electric Industries, Ltd. | Method of producing a superconducting Bi-based oxide wire |
| JPH03216917A (ja) * | 1990-01-19 | 1991-09-24 | Sumitomo Electric Ind Ltd | 超電導線材の製造方法 |
| EP0447994A2 (en) * | 1990-03-16 | 1991-09-25 | Sumitomo Electric Industries, Ltd. | Bismuth oxide superconductor and method of preparing the same |
| EP0449161A2 (en) * | 1990-03-26 | 1991-10-02 | Sumitomo Electric Industries, Ltd. | Method of preparing bismuth oxide superconductor |
| EP0450443A1 (en) * | 1990-04-02 | 1991-10-09 | General Electric Company | Preparation of tape of silver covered Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconductor |
| JPH041002A (ja) * | 1990-04-18 | 1992-01-06 | Sumitomo Electric Ind Ltd | 酸化物超電導体の製造方法 |
| JPH0412413A (ja) * | 1990-04-28 | 1992-01-17 | Sumitomo Electric Ind Ltd | ビスマス系酸化物超電導体の製造方法 |
| JPH0448518A (ja) * | 1990-06-15 | 1992-02-18 | Sumitomo Electric Ind Ltd | ビスマス系超電導導体の製造方法 |
| JPH0465034A (ja) * | 1990-07-02 | 1992-03-02 | Mitsubishi Electric Corp | 酸化物超電導線材の製造方法 |
| EP0467238A1 (en) * | 1990-07-16 | 1992-01-22 | Sumitomo Electric Industries, Limited | Method of preparing bismuth superconductor |
| EP0470595A1 (en) * | 1990-08-08 | 1992-02-12 | Sumitomo Electric Industries, Limited | Method of preparing bismuth oxide superconductor |
| JPH04123718A (ja) * | 1990-09-14 | 1992-04-23 | Sumitomo Electric Ind Ltd | 超電導線材の製造方法 |
| JPH04237910A (ja) * | 1991-01-19 | 1992-08-26 | Sumitomo Electric Ind Ltd | ビスマス系酸化物超電導線材の製造方法 |
Non-Patent Citations (2)
| Title |
|---|
| IEEE Transactions on Magnetics, Vol. 27, No. 2, March 1991 (31.03.91), pages 1231-1238, K. SATO, T. HIKATA, H. MUKAI, M. UEYAMA, N. SHIBUTA, T. KATO, T. MASUDA, M. NAGATA, K. IWATA, T. MITSUI, "High-Jc silver-sheathed Bi-based superconducting wires", Refer to full descriptions and all drawings. * |
| See also references of EP0551523A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69208856D1 (de) | 1996-04-11 |
| AU2345992A (en) | 1993-02-23 |
| JPH0536317A (ja) | 1993-02-12 |
| US5552376A (en) | 1996-09-03 |
| DE69208856T2 (de) | 1996-09-05 |
| CA2092180A1 (en) | 1993-01-25 |
| AU646971B2 (en) | 1994-03-10 |
| EP0551523A4 (en) | 1993-08-25 |
| EP0551523A1 (en) | 1993-07-21 |
| CA2092180C (en) | 1996-12-03 |
| EP0551523B1 (en) | 1996-03-06 |
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