Flux pinning by precipitates in the Bi-Sr-Ca-Cu-O system

Shi, Donglu

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Title: Flux pinning by precipitates in the Bi-Sr-Ca-Cu-O system

Abstract

A fundamental pinning mechanism has been identified in the Bi-Sr-Ca-Cu-O system. The pinning strength has been greatly increased by the introduction of calcium- and copper-rich precipitates into the sample matrix. The calcium and copper are supersaturated in the system by complete melting, and the fine calcium and copper particles precipitated during subsequent crystallization anneal to obtain the superconducting phases. The intragrain critical current density has been increased from the order of 10.sup.5 A/cm.sup.2 to 10.sup.7 A/cm.sup.2 at 5 T.

Inventors:

Shi, Donglu ^[1]

Chicago, IL

Issue Date:: 1992-01-01

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States)

OSTI Identifier:: 868299

Patent Number(s):: 5114909

Assignee:: United States of America as represented by Department of Energy (Washington, DC)

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
C04B35/4521 - {containing bismuth oxide}
C04B35/653 - Processes involving a melting step

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
Y10S505/733 - Rapid solidification, e.g. quenching, gas-atomizing, melt-spinning, roller-quenching
Y10S505/782 - Bismuth-, e.g. BiCaSrCuO

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DOE Contract Number:: W-31109-ENG-38

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: flux; pinning; precipitates; bi-sr-ca-cu-o; fundamental; mechanism; identified; strength; greatly; increased; introduction; calcium-; copper-rich; sample; matrix; calcium; copper; supersaturated; complete; melting; fine; particles; precipitated; subsequent; crystallization; anneal; obtain; superconducting; phases; intragrain; critical; current; density; 10; cm; flux pinning; current density; critical current; greatly increased; superconducting phase; fine calcium; greatly increase; /505/252/501/

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                    Shi, Donglu. Flux pinning by precipitates in the Bi-Sr-Ca-Cu-O system.  United States: N. p., 1992. 
        Web.

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                    Shi, Donglu. Flux pinning by precipitates in the Bi-Sr-Ca-Cu-O system.  United States.

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                    Shi, Donglu. Wed .  
        "Flux pinning by precipitates in the Bi-Sr-Ca-Cu-O system".  United States.  https://www.osti.gov/servlets/purl/868299.

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@article{osti_868299,

  title        = {Flux pinning by precipitates in the Bi-Sr-Ca-Cu-O system},

  author       = {Shi, Donglu},

  abstractNote = {A fundamental pinning mechanism has been identified in the Bi-Sr-Ca-Cu-O system. The pinning strength has been greatly increased by the introduction of calcium- and copper-rich precipitates into the sample matrix. The calcium and copper are supersaturated in the system by complete melting, and the fine calcium and copper particles precipitated during subsequent crystallization anneal to obtain the superconducting phases. The intragrain critical current density has been increased from the order of 10.sup.5 A/cm.sup.2 to 10.sup.7 A/cm.sup.2 at 5 T.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1992},

  month        = {1}

}

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Works referenced in this record:

110 k superconductivity in crystallized Bi-Sr-Ca-Cu-O glasses
journal, December 1988

Shi, Donglu; Blank, Monica; Patel, Mita
Physica C: Superconductivity, Vol. 156, Issue 5
https://doi.org/10.1016/0921-4534(88)90168-2