Method for preparation of textured YBa.sub.2 Cu.sub.3 O.sub.x superconductor

Title: Method for preparation of textured YBa.sub.2 Cu.sub.3 O.sub.x superconductor

Full Record
Other Related Research

Abstract

The present invention relate to textured YBa.sub.2 Cu.sub.3 O.sub.x (Y-123) superconductors and a process of preparing them by directional recrystallization of compacts fabricated from quenched YBCO powders at temperatures about 100.degree. C. below the peritectic temperature to provide a superconductor where more than 75% of the YBa.sub.2 Cu.sub.3 O.sub.x phase is obtained without any Y.sub.2 BaCuO.sub.5 .

Inventors:

Selvamanickam, Venkat ^[1]; Goyal, Amit ^[2]; Kroeger, Donald M ^[2]

Guilderland, NY
Knoxville, TN

Issue Date:: 1998-01-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 872028

Patent Number(s):: 5846912

Assignee:: Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN)

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; preparation; textured; yba; cu; superconductor; relate; y-123; superconductors; process; preparing; directional; recrystallization; compacts; fabricated; quenched; ybco; powders; temperatures; 100; degree; below; peritectic; temperature; provide; 75; phase; obtained; bacuo; textured yba; /505/423/

Citation Formats


                    Selvamanickam, Venkat, Goyal, Amit, and Kroeger, Donald M. Method for preparation of textured YBa.sub.2 Cu.sub.3 O.sub.x superconductor.  United States: N. p., 1998. 
        Web.

Copy to clipboard


                    Selvamanickam, Venkat, Goyal, Amit, & Kroeger, Donald M. Method for preparation of textured YBa.sub.2 Cu.sub.3 O.sub.x superconductor.  United States.

Copy to clipboard


                    Selvamanickam, Venkat, Goyal, Amit, and Kroeger, Donald M. Thu .  
        "Method for preparation of textured YBa.sub.2 Cu.sub.3 O.sub.x superconductor".  United States.  https://www.osti.gov/servlets/purl/872028.

Copy to clipboard


                    
@article{osti_872028,

  title        = {Method for preparation of textured YBa.sub.2 Cu.sub.3 O.sub.x superconductor},

  author       = {Selvamanickam, Venkat and Goyal, Amit and Kroeger, Donald M},

  abstractNote = {The present invention relate to textured YBa.sub.2 Cu.sub.3 O.sub.x (Y-123) superconductors and a process of preparing them by directional recrystallization of compacts fabricated from quenched YBCO powders at temperatures about 100.degree. C. below the peritectic temperature to provide a superconductor where more than 75% of the YBa.sub.2 Cu.sub.3 O.sub.x phase is obtained without any Y.sub.2 BaCuO.sub.5 .},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1998},

  month        = {1}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

(Bi, Pb).sub.2, Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x superconductor and method of making same utilizing sinter-forging

Patent Chen, Nan [Downers Grove, IL]; Goretta, Kenneth C [Downers Grove, IL]; Lanagan, Michael T [Woodridge, IL]

A (BiPb).sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x (Bi223) superconductor with high J.sub.c, phase purity, density and mechanical strength is formed from Bi2223 powder which is synthesized from a mixture of Bi.sub.2 O.sub.3, PbO, SrCO.sub.3, CaCo.sub.3 and CuO. The mixture is milled, then dried and calcined to synthesize the Bi2223 powder with the desired phase purity. The calcination is performed by heating the dried mixture for 50 hours at 840.degree. C. The partially synthesized powder is then milled for 1-4 hours before calcining further for another 50 hours at 855.degree. C. to complete the synthesis. After calcination, the Bi2223 powder is coldmore »« less
Full Text Available
Synthesis of Bi.sub.1.8 Pb.sub.0.4 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x superconductor

Patent Smith, Michael G [Los Alamos, NM]

Two-powder processes for the synthesis of superconducting (Bi, Pb)-2223/Ag-clad wires by the oxide-powder-in-the-robe are provided. The first precursor powder, of nominal stoichiometry CaCuO.sub.x, is a solution-synthesized mixture of Ca.sub.0.45 Cu.sub.0.55 O.sub.2 and CaO. Using these oxide precursor mixtures, superconducting tapes with well-aligned grains and reproducible critical current densities J.sub.c in the range of 20,000 to 26,000 A/cm.sup.2 at 75 K in self-field after annealing less than 200 hours were obtained.
Full Text Available
Method for making high-critical-current-density YBa.sub.2 Cu.sub.3 O.sub.7 superconducting layers on metallic substrates

Patent Feenstra, Roeland [Knoxville, TN]; Christen, David [Oak Ridge, TN]; Paranthaman, Mariappan [Knoxville, TN]

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
Millimeter size single crystals of superconducting YBa.sub.2 Cu.sub.3 O.sub .

Patent Damento, Michael A [Ames, IA]; Gschneidner, Jr., Karl A. (Ames, IA)

A method of growing large, up to 1 mm size single crystals of superconducting YBa.sub.2 Cu.sub.3 O.sub.x, wherein x equals from 6.5 to 7.2.
Full Text Available
Preparation of highly oxidized RBa.sub.2 Cu.sub.4 O.sub.8 superconductors

Patent Morris, Donald E [Kensington, CA]

Novel superconducting materials in the form of compounds, structures or phases are formed by performing otherwise known syntheses in a highly oxidizing atmosphere rather than that created by molecular oxygen at atmospheric pressure or below. This leads to the successful synthesis of novel superconducting compounds which are thermodynamically stable at the conditions under which they are formed. The compounds and structures thus formed are substantially nonsusceptible to variations in their oxygen content when subjected to changing temperatures, thereby forming a temperature-stable substantially single phase crystal.
Full Text Available

Similar Records