WO2000002208A1 - Fils supraconducteurs et leur fabrication - Google Patents

Fils supraconducteurs et leur fabrication Download PDF

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Publication number
WO2000002208A1
WO2000002208A1 PCT/AU1999/000527 AU9900527W WO0002208A1 WO 2000002208 A1 WO2000002208 A1 WO 2000002208A1 AU 9900527 W AU9900527 W AU 9900527W WO 0002208 A1 WO0002208 A1 WO 0002208A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
tube
superconducting
axially extending
tape
Prior art date
Application number
PCT/AU1999/000527
Other languages
English (en)
Inventor
Francis Anthony Darmann
Original Assignee
Metal Manufactures Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AUPP4429A external-priority patent/AUPP442998A0/en
Priority claimed from AUPP4509A external-priority patent/AUPP450998A0/en
Application filed by Metal Manufactures Limited filed Critical Metal Manufactures Limited
Priority to AU45918/99A priority Critical patent/AU4591899A/en
Publication of WO2000002208A1 publication Critical patent/WO2000002208A1/fr

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
    • H10N60/20—Permanent superconducting devices
    • H10N60/203—Permanent superconducting devices comprising high-Tc ceramic materials
    • 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

Definitions

  • the PIT technique is essentially a deformation process whereby a
  • This process may typically be used to
  • a multifilament tape may be
  • the wire is then be passed through a rolling mill to produce a
  • a multifilament tape is produced by
  • a physically or geometrically isotropic or symmetrical wire is a wire of
  • Magnetic isotropy at any cross-section along a wire may be satisfied
  • Rotational symmetry exists in a wire which has both physical and magnetic isotropy.
  • axially extending wire including a substantially axially extending
  • the filament is rotationally asymmetrical about the axis at
  • the anisotropic and isotropic conditions are satisfied in
  • the wire includes a plurality of the filaments arranged, in
  • each stack contains a plurality of the filaments.
  • the filaments are embedded in a silver or silver alloy
  • a pitch of the helical shape is selected on the basis of an
  • the pitch of the helical shape is selected on the basis of an
  • the filaments include Pb stabilised BSCCO-2223 ceramic.
  • the method further includes the step, prior to the sintering
  • the tapes are positioned within the secondary tube in one or
  • the twisting step includes the sub-step of twisting the
  • the twisting step is performed in a number of twisting sub-
  • the drawing step is performed in a number of drawing sub-
  • the degassing step includes the sub-step of placing the
  • atmosphere is substantially nitrogen.
  • the primary and/or secondary tubes are formed from silver
  • the secondary tube includes a rectangular bore for
  • the precursors packed into the primary tube includes Pb
  • Substantial isotropy in the wire may be ascertained by placing a pair
  • D is a whole number of the half twist pitches.
  • D is a whole number of twist pitches.
  • anisotropic wires may be
  • the tube may
  • the twisting may be performed in stages,
  • the tube may
  • preferably round tube having a round bore may result in approximately 28% of
  • the tube comprises a rectangular cross-section bore adapted to
  • the wire may be determined experimentally depending upon the application
  • pitches of about 10mm may be obtained without resulting in a lowering of l c .
  • Ceramic superconductor materials for use in the present invention include, but are not limited to, ceramic high temperature superconductors
  • Yttrium Barium Copper Oxide Y 1 Ba 2 Cu 3 0 7
  • YBCO-123 Bismuth Strontium Calcium Copper Oxide (Bi Sr 2 Ca 2 Cu 1 0 2 ) ⁇
  • Bi Sr 2 Ca 2 Cu 1 0 2 ⁇ Bismuth Strontium Calcium Copper Oxide
  • Thallium Barium Calcium Copper Oxide (Ti ⁇ a ⁇ a ⁇ U g O ) (TBCCO-1223);
  • Thallium Barium Calcium Copper Oxide (TI 2 Ba 2 Ca 1 Cu 2 O y ) (TBCCO-2212);
  • Thallium Barium Calcium Copper Oxide (TI 2 Ba 2 Ca 2 Cu 3 O y ) (TBCCO-2223); Mercury Barium Calcium Copper Oxide (Hg 1 Ba 2 Ca 2 Cu 3 O y ) (HBCCO-1223):
  • BSCCO-2223 Lead stabilised Bismuth Strontium Calcium Copper Oxide
  • Precursor materials of the ceramic superconductor materials include
  • the desired precursor in the formation of BSCCO-2223, the desired precursor
  • materials are powders prepared by co-decomposition of metal nitrate
  • the powders may be calcined and may contain the -2212 as the major phase.
  • the precalcined powders may be transformed to the -2223 phase by sintering
  • means including by moulding, pressing, slip casting and extrusion.
  • the at least one ceramic superconducting tape may be formed by any combination of
  • Such means include by the PIT technique, a Doctor/Blade
  • the metal selected to support the ceramic superconducting material is
  • Figure 1 is a cross-sectional micrograph of a 1X11 z-stack
  • Figure 4 is a graph of l c as a function of applied magnetic field for the
  • FIG. 7 illustrates the experimental arrangement employed in
  • ceramic-metal composite wire with an inner ceramic core and outer metallic
  • the packed tube was drawn through a die a plurality of times, reducing its
  • round composite wire was rolled into a flat tape 0.3mm thick.
  • Multifilamentary samples of tape-in-tube wires were fabricated by
  • a particular re-stack tube was fabricated in one example by placing a
  • the tube having an inner diameter of 8mm and an outer diameter of
  • wires were sintered at 1043K ⁇ T ⁇ 1113K for times up to 100
  • the critical current density was calculated from l c /s, where s is the
  • Figure 1 shows a cross-sectional micrograph of the 1 x 11 z-stack
  • wire2 l-B for isotropic wire with field applied 90° from previous set
  • the silver packing tube may include an inner cross-
  • section being square or polygonal.
  • the loaded tube was degassed by heating to 923K for approximately 3
  • drawing passes, reducing its diameter, to form a ceramic-metal composite
  • the composite was drawn down to a diameter of 2.13mm.
  • the wire was rolled to a flat tape of thickness 0.80mm. This rolling was
  • a plurality of flat tapes were stacked in an array inside a round 99.99%
  • having a plurality of tapes in each can be selected to suit a silver tube having
  • each of the three wires respectively experienced 15, 8 and 4 longitudinal turns over their lengths.
  • the respective pitches of the twisted wires was 5, 10 and 20mm.
  • annealing is effected after each 360° twist of the wire.
  • control sample was drawn down to a diameter of 1.54mm, the same as
  • control sample were sintered in identical fashions during the drawing process.
  • Figure 6 presents a representative example of the cross-section of one
  • the diameter of the wire illustrated in figure 6 is
  • Figure 7 schematically depicts the arrangement of the magnetic field.
  • the twisted wire varied by less than 5% of the initial critical current for each 5°
  • critical current shows a variation of more than 30% from the initial critical

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

Un fil supraconducteur s'étendant axialement comprend un filament supraconducteur s'étendant sensiblement axialement et présentant une section aplatie. Le filament supraconducteur est torsadé sur au moins une partie substantielle de sa longueur, sous la forme d'une hélice, de sorte qu'il se comporte de manière anisotrope par rapport à l'effet d'un champ magnétique appliqué sur le courant critique Ic, au niveau d'un point transversal, quel qu'il soit, sur la longueur du fil, et de manière sensiblement isotrope par rapport à l'effet d'un champ magnétique appliqué sur le courant critique auto-induit Ic, sur une partie substantielle de la longueur du fil.
PCT/AU1999/000527 1998-06-30 1999-06-30 Fils supraconducteurs et leur fabrication WO2000002208A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU45918/99A AU4591899A (en) 1998-06-30 1999-06-30 Superconducting wires and their manufacture

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPP4429 1998-06-30
AUPP4429A AUPP442998A0 (en) 1998-06-30 1998-06-30 Superconducting wires and their manufacture
AUPP4509A AUPP450998A0 (en) 1998-07-06 1998-07-06 Superconducting wires and their manufacture
AUPP4509 1998-07-06

Publications (1)

Publication Number Publication Date
WO2000002208A1 true WO2000002208A1 (fr) 2000-01-13

Family

ID=25645815

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1999/000527 WO2000002208A1 (fr) 1998-06-30 1999-06-30 Fils supraconducteurs et leur fabrication

Country Status (1)

Country Link
WO (1) WO2000002208A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6600939B1 (en) 1998-03-18 2003-07-29 Metal Manufactures Limited Superconducting tapes
US6819948B2 (en) 1998-03-18 2004-11-16 Metal Manufacturers Limited Superconducting tapes
US6842634B2 (en) 1998-03-18 2005-01-11 Metal Manufacturers Limited Integrated tape
US6916991B2 (en) 1998-03-18 2005-07-12 Metal Manufacturing Limited Superconducting tapes

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04155711A (ja) * 1990-10-19 1992-05-28 Central Res Inst Of Electric Power Ind 高温超電導交流用線材及びその製造方法
EP0503525A1 (fr) * 1991-03-15 1992-09-16 ABBPATENT GmbH Procédé pour fabriquer des fils supraconducteur
EP0638942A1 (fr) * 1993-08-02 1995-02-15 Sumitomo Electric Industries, Limited Fil en oxyde supraconducteur, procédé de sa fabrication, bobine et câble en oxyde supraconducteur
WO1996008045A1 (fr) * 1994-09-08 1996-03-14 American Superconductor Corporation Texturation par torsion d'articles composites contenant un oxyde supraconducteur
EP0736914A1 (fr) * 1995-04-07 1996-10-09 Sumitomo Electric Industries, Ltd. Fil supraconducteur d'oxyde et procédé de fabrication
WO1997017706A2 (fr) * 1995-11-07 1997-05-15 American Superconductor Corporation Conducteurs en cable contenant des composants supraconducteurs anisotropes et procede de fabrication correspondant
US5706571A (en) * 1995-09-14 1998-01-13 Alcatel Alsthom Compagnie Generale D'electricite Method of manufacturing a sheathed twisted superconductor having a high critical temperature

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04155711A (ja) * 1990-10-19 1992-05-28 Central Res Inst Of Electric Power Ind 高温超電導交流用線材及びその製造方法
EP0503525A1 (fr) * 1991-03-15 1992-09-16 ABBPATENT GmbH Procédé pour fabriquer des fils supraconducteur
EP0638942A1 (fr) * 1993-08-02 1995-02-15 Sumitomo Electric Industries, Limited Fil en oxyde supraconducteur, procédé de sa fabrication, bobine et câble en oxyde supraconducteur
WO1996008045A1 (fr) * 1994-09-08 1996-03-14 American Superconductor Corporation Texturation par torsion d'articles composites contenant un oxyde supraconducteur
EP0736914A1 (fr) * 1995-04-07 1996-10-09 Sumitomo Electric Industries, Ltd. Fil supraconducteur d'oxyde et procédé de fabrication
US5706571A (en) * 1995-09-14 1998-01-13 Alcatel Alsthom Compagnie Generale D'electricite Method of manufacturing a sheathed twisted superconductor having a high critical temperature
WO1997017706A2 (fr) * 1995-11-07 1997-05-15 American Superconductor Corporation Conducteurs en cable contenant des composants supraconducteurs anisotropes et procede de fabrication correspondant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6600939B1 (en) 1998-03-18 2003-07-29 Metal Manufactures Limited Superconducting tapes
US6819948B2 (en) 1998-03-18 2004-11-16 Metal Manufacturers Limited Superconducting tapes
US6842634B2 (en) 1998-03-18 2005-01-11 Metal Manufacturers Limited Integrated tape
US6845255B2 (en) 1998-03-18 2005-01-18 Metal Manufacturers Limited Superconducting tapes
US6916991B2 (en) 1998-03-18 2005-07-12 Metal Manufacturing Limited Superconducting tapes

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