Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates

Title: Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates

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Abstract

An elongated, flexible superconductive wire or strip is fabricated by pulling it through and out of a melt of metal oxide material at a rate conducive to forming a crystalline coating of superconductive metal oxide material on an elongated, flexible substrate wire or strip. A coating of crystalline superconductive material, such as Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8, is annealed to effect conductive contact between adjacent crystalline structures in the coating material, which is then cooled to room temperature. The container for the melt can accommodate continuous passage of the substrate through the melt. Also, a second pass-through container can be used to simultaneously anneal and overcoat the superconductive coating with a hot metallic material, such as silver or silver alloy. A hollow, elongated tube casting method of forming an elongated, flexible superconductive wire includes drawing the melt by differential pressure into a heated tubular substrate.

Inventors:

Ciszek, Theodore F. ^[1]

(Evergreen, CO)

Publication Date:: Sat Jan 01 00:00:00 EST 1994

Research Org.:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 869241

Patent Number(s):: US 5304534

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

DOE Contract Number:: AC02-83CH10093

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; apparatus; forming; high-critical-temperature; superconducting; layers; flat; elongated; substrates; flexible; superconductive; wire; strip; fabricated; pulling; melt; metal; oxide; material; rate; conducive; crystalline; coating; substrate; sr; cacu; annealed; effect; conductive; contact; adjacent; structures; cooled; temperature; container; accommodate; continuous; passage; pass-through; simultaneously; anneal; overcoat; hot; metallic; silver; alloy; hollow; tube; casting; drawing; differential; pressure; heated; tubular; flexible substrate; conducting layer; crystalline structures; metallic material; coating material; conductive material; metal oxide; differential pressure; oxide material; temperature superconducting; superconductive material; crystalline structure; hot metal; conductive metal; tubular substrate; superconducting layers; superconductive wire; silver alloy; superconducting layer; high-critical-temperature superconducting; superconductive coating; elongated tube; casting method; conductive coating; conductive contact; line structure; /505/

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                    Ciszek, Theodore F. Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates.  United States: N. p., 1994. 
        Web.

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                    Ciszek, Theodore F. Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates.  United States.

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                    Ciszek, Theodore F. Sat .  
        "Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates".  United States.  
        doi:.  https://www.osti.gov/servlets/purl/869241.

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@article{osti_869241,

  title        = {Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates},

  author       = {Ciszek, Theodore F.},

  abstractNote = {An elongated, flexible superconductive wire or strip is fabricated by pulling it through and out of a melt of metal oxide material at a rate conducive to forming a crystalline coating of superconductive metal oxide material on an elongated, flexible substrate wire or strip. A coating of crystalline superconductive material, such as Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8, is annealed to effect conductive contact between adjacent crystalline structures in the coating material, which is then cooled to room temperature. The container for the melt can accommodate continuous passage of the substrate through the melt. Also, a second pass-through container can be used to simultaneously anneal and overcoat the superconductive coating with a hot metallic material, such as silver or silver alloy. A hollow, elongated tube casting method of forming an elongated, flexible superconductive wire includes drawing the melt by differential pressure into a heated tubular substrate.},

  doi          = {},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sat Jan 01 00:00:00 EST 1994},

  month        = {Sat Jan 01 00:00:00 EST 1994}

}

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Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates

Ciszek, T.F.

An elongated, flexible superconductive wire or strip is fabricated by pulling it through and out of a melt of metal oxide material at a rate conducive to forming a crystalline coating of superconductive metal oxide material on an elongated, flexible substrate wire or strip. A coating of crystalline superconductive material, such as Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8], is annealed to effect conductive contact between adjacent crystalline structures in the coating material, which is then cooled to room temperature. The container for the melt can accommodate continuous passage of the substrate through the melt. Also, a second pass-through container can bemore »« less
Method and apparatus for forming high-critical-temperature superconducting layers on flat and/or elongated substrates

Ciszek, T.F.

An elongated, flexible superconductive wire or strip is fabricated by pulling it through and out of a melt of metal oxide material at a rate conducive to forming a crystalline coating of superconductive metal oxide material on an elongated, flexible substrate wire or strip. A coating of crystalline superconductive material, such as Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}, is annealed to effect conductive contact between adjacent crystalline structures in the coating material, which is then cooled to room temperature. The container for the melt can accommodate continuous pass-through of the substrate through the melt. Also, a second pass through container canmore »« less
Method for making high-critical-current-density YBa.sub.2 Cu.sub.3 O.sub.7 superconducting layers on metallic substrates

Feenstra, Roeland ; Christen, David ; Paranthaman, Mariappan

A method is disclosed for fabricating YBa.sub.2 Cu.sub.3 O.sub.7 superconductor layers with the capability of carrying large superconducting currents on a metallic tape (substrate) supplied with a biaxially textured oxide buffer layer. The method represents a simplification of previously established techniques and provides processing requirements compatible with scale-up to long wire (tape) lengths and high processing speeds. This simplification has been realized by employing the BaF.sub.2 method to grow a YBa.sub.2 Cu.sub.3 O.sub.7 film on a metallic substrate having a biaxially textured oxide buffer layer.
Full Text Available
Method for making high-critical-current-density YBa{sub 2}Cu{sub 3}O{sub 7} superconducting layers on metallic substrates

Feenstra, R. ; Christen, D. ; Paranthaman, M.

A method is disclosed for fabricating YBa{sub 2}Cu{sub 3}O{sub 7} superconductor layers with the capability of carrying large superconducting currents on a metallic tape (substrate) supplied with a biaxially textured oxide buffer layer. The method represents a simplification of previously established techniques and provides processing requirements compatible with scale-up to long wire (tape) lengths and high processing speeds. This simplification has been realized by employing the BaF{sub 2} method to grow a YBa{sub 2}Cu{sub 3}O{sub 7} film on a metallic substrate having a biaxially textured oxide buffer layer.
Method of forming oxidic high-T sub c superconducting materials on substantially lattice matched monocrystalline substrates utilizing liquid phase epitxy

Belt, R.F. ; Ings, J.B.

This paper describes improvement in a method of forming an epitaxial layer of an oxidic high T{sub c} superconductor on a substantially lattice matched mono-crystalline substrate. The improvement comprises: forming a melt wherein the primary phase to crystallize out on cooling of the melt to effect film growth is the phase of the high T{sub c} oxidic superconductor, the melt comprising a nutriment composed of oxides of each element of the oxidic superconductor and a non-oxidic flux for the oxides; introducing the substrate into the melt; and cooling the melt to deposit an epitaxial layer of oxidic superconductor on themore » substrate.« less