Method and composition for improving flux pinning and critical current in superconductors

Morris, Donald E

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Title: Method and composition for improving flux pinning and critical current in superconductors

Abstract

Superconducting materials and methods of forming superconducting materials are disclosed. Highly oxidized superconductors are heated at a relatively high temperature so as to release oxygen, which migrates out of the material, and form a non-superconducting phase which does not diffuse out of grains of the material. The material is then reoxidized at a lower temperature, leaving the non-superconducting inclusions inside a superconducting phase. The non-superconducting inclusions act as pinning centers in the superconductor, increasing the critical current thereof.

Inventors:

Morris, Donald E ^[1]

Kensington, CA

Issue Date:: 1995-01-01

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

OSTI Identifier:: 869961

Patent Number(s):: 5430008

Assignee:: Regents of University of California (Oakland, CA)

Patent Classifications (CPCs):: C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

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C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B35/45 - based on copper oxide or solid solutions thereof with other oxides
C04B35/64 - Burning or sintering processes

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S505/725 - Process of making or treating high tc, above 30 k, superconducting shaped material, article, or device
Y10S505/775 - High tc, above 30 k, superconducting material
Y10S505/776 - Containing transition metal oxide with rare earth or alkaline earth
Y10S505/779 - Other rare earth, i.e. Sc,Y,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu and alkaline earth, i.e. Ca,Sr,Ba,Ra
Y10S505/78 - Yttrium and barium-, e.g. YBa2Cu307
Y10S505/782 - Bismuth-, e.g. BiCaSrCuO
Y10S505/783 - Thallium-, e.g. Tl2CaBaCu308
Y10S505/784 - Bismuth-, e.g. BaKBiO
Y10S505/785 - Composition containing superconducting material and diverse nonsuperconducting material

Show less

DOE Contract Number:: AC03-76SF00098

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; composition; improving; flux; pinning; critical; current; superconductors; superconducting; materials; methods; forming; disclosed; highly; oxidized; heated; relatively; temperature; release; oxygen; migrates; material; form; non-superconducting; phase; diffuse; grains; reoxidized; leaving; inclusions; inside; centers; superconductor; increasing; flux pinning; pinning centers; conducting material; superconducting material; critical current; superconducting materials; oxidized superconductors; superconducting phase; highly oxidized; forming superconducting; /505/252/

Citation Formats


                    Morris, Donald E. Method and composition for improving flux pinning and critical current in superconductors.  United States: N. p., 1995. 
        Web.

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                    Morris, Donald E. Method and composition for improving flux pinning and critical current in superconductors.  United States.

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                    Morris, Donald E. Sun .  
        "Method and composition for improving flux pinning and critical current in superconductors".  United States.  https://www.osti.gov/servlets/purl/869961.

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@article{osti_869961,

  title        = {Method and composition for improving flux pinning and critical current in superconductors},

  author       = {Morris, Donald E},

  abstractNote = {Superconducting materials and methods of forming superconducting materials are disclosed. Highly oxidized superconductors are heated at a relatively high temperature so as to release oxygen, which migrates out of the material, and form a non-superconducting phase which does not diffuse out of grains of the material. The material is then reoxidized at a lower temperature, leaving the non-superconducting inclusions inside a superconducting phase. The non-superconducting inclusions act as pinning centers in the superconductor, increasing the critical current thereof.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1995},

  month        = {1}

}

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Works referenced in this record:

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Similar Records

Title: Method and composition for improving flux pinning and critical current in superconductors

Abstract

Citation Formats

Ozone‐UV irradiation effects on Ba 2 YCu 3 O 7 − x thin films journal, June 1988

High T c Copper-oxide superconductors of thallium, bismuth and lead journal, December 1989

Superconductivity: Is the Party Over? journal, May 1989

Field-induced orientation of nonlevitated microcrystals of superconducting YBa 2 Cu 3 O 7 − x journal, February 1988

Eight new high-temperature superconductors with the 1:2:4 structure journal, April 1989

Synthesis of bulk superconducting YBa2Cu4O8 at one atmosphere oxygen pressure journal, March 1989

Chemosystematics of Capparaceae journal, October 1988

Superconducting properties of mixtures of Y 1 Ba 2 Cu 3 O 9− x and Y 1.8 Ba 0.2 Cu 1 O 5− y journal, December 1988

Composition Dependence of Superconductivity in (Ba 0.1 La 1.9 )Ag x Cu 1- x O 4- y System journal, May 1987

Magnetization studies of YBa2Cu3O7−x irradiated by fast neutrons journal, February 1988

Stability limits of the perovskite structure in the Y‐Ba‐Cu‐O system journal, May 1989

Role of α precipitates in flux pinning in a superconducting Ti-Nb-Ta-Zr quaternary alloy journal, August 1984

Stability of 124, 123, and 247 superconductors journal, June 1989

Superconducting properties of a 27-A ̊ phase of Ba-Y-Cu-O journal, September 1988

On the Reactions of Quenched BaYCuO Powders with Various Materials journal, June 1988

PROBLEMS IN THE PRODUCTION OF YBa 2 Cu 3 O x SUPERCONDUCTING WIRE journal, July 1987

Superconductivity at 90 K in the Y-Ba-Al-Cu-O System journal, June 1987

Pinning of Flux Vortices in Type II Superconductors journal, August 1968

New milestones set with Bulk, thin-film superconductors journal, November 1989

Properties of Y-Ba-Cu-O thin films with ordered defect structure: Y 2 Ba 4 Cu 8 O 2 0 − x journal, July 1988

Bulk synthesis of the 81-K superconductor YBa2Cu4O8 at high oxygen pressure journal, December 1988

Magnetic field alignment of high-T c superconductorsRBa2Cu3O7?? (R=rare earth) journal, September 1988

Resistive Transition of High-Temperature Superconductors journal, October 1988

Observation of alignment of superconducting YBa 2 Cu 3 O 7 particles in a magnetic field using neutron diffraction journal, January 1988

Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure journal, March 1987

Effect of atmosphere on the formation of low T c and high T c phases in Bi‐Pb‐Sr‐Ca‐Cu‐O superconductors journal, April 1989

Observation of Hexagonally Correlated Flux Quanta In Y Ba 2 Cu 3 O 7 journal, November 1987

Crystal structure of the 80 K superconductor YBa2Cu4O8 journal, July 1988

A New Process with the Promise of High J c in Oxide Superconductors journal, July 1989

Ozone‐UV irradiation effects on Ba ₂ YCu ₃ O ₇ ₋ _x thin films
journal, June 1988

High T _c Copper-oxide superconductors of thallium, bismuth and lead
journal, December 1989

Superconductivity: Is the Party Over?
journal, May 1989

Field-induced orientation of nonlevitated microcrystals of superconducting ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - x}$
journal, February 1988

Eight new high-temperature superconductors with the 1:2:4 structure
journal, April 1989

Synthesis of bulk superconducting YBa2Cu4O8 at one atmosphere oxygen pressure
journal, March 1989

Chemosystematics of Capparaceae
journal, October 1988

Superconducting properties of mixtures of Y ₁ Ba ₂ Cu ₃ O _{9− x} and Y _1.8 Ba _0.2 Cu ₁ O _{5− y}
journal, December 1988

Composition Dependence of Superconductivity in (Ba _0.1 La _1.9 )Ag _x Cu _{1- x} O _{4- y} System
journal, May 1987

Magnetization studies of YBa2Cu3O7−x irradiated by fast neutrons
journal, February 1988

Stability limits of the perovskite structure in the Y‐Ba‐Cu‐O system
journal, May 1989

Role of α precipitates in flux pinning in a superconducting Ti-Nb-Ta-Zr quaternary alloy
journal, August 1984

Stability of 124, 123, and 247 superconductors
journal, June 1989

Superconducting properties of a 27-A ̊ phase of Ba-Y-Cu-O
journal, September 1988

On the Reactions of Quenched BaYCuO Powders with Various Materials
journal, June 1988

PROBLEMS IN THE PRODUCTION OF YBa ₂ Cu ₃ O _x SUPERCONDUCTING WIRE
journal, July 1987

Superconductivity at 90 K in the Y-Ba-Al-Cu-O System
journal, June 1987

Pinning of Flux Vortices in Type II Superconductors
journal, August 1968

New milestones set with Bulk, thin-film superconductors
journal, November 1989

Properties of Y-Ba-Cu-O thin films with ordered defect structure: $Y_{2} {Ba}_{4} {Cu}_{8} O_{20 - x}$
journal, July 1988

Bulk synthesis of the 81-K superconductor YBa2Cu4O8 at high oxygen pressure
journal, December 1988

Magnetic field alignment of high-T c superconductorsRBa2Cu3O7?? (R=rare earth)
journal, September 1988

Resistive Transition of High-Temperature Superconductors
journal, October 1988

Observation of alignment of superconducting ${YBa}_{2}$ ${Cu}_{3}$ $O_{7}$ particles in a magnetic field using neutron diffraction
journal, January 1988

Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure
journal, March 1987

Effect of atmosphere on the formation of low T _c and high T _c phases in Bi‐Pb‐Sr‐Ca‐Cu‐O superconductors
journal, April 1989

Observation of Hexagonally Correlated Flux Quanta In Y ${Ba}_{2}$ ${Cu}_{3}$ $O_{7}$
journal, November 1987

Crystal structure of the 80 K superconductor YBa2Cu4O8
journal, July 1988

A New Process with the Promise of High J _c in Oxide Superconductors
journal, July 1989