Fabrication of Ag/Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8{+-}}{sub x} superconducting tapes by the oxidation and postoxidation (partial melt) annealing of malleable, metal-bearing precursors

Journal Article · Tue Feb 01 04:00:00 EST 2000 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.2000.0049· OSTI ID:20216016

Detrie, Terry J ^[1]; Sandhage, Kenneth H ^[1]

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1. Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210 (United States)

A solid metal-bearing precursor route has been used to fabricate Ag-sheathed Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8{+-}}{sub x}(2212) superconducting tapes. Intimately mixed Bi{sub 2}O{sub 3}-Sr-Ca-Cu-bearing powder was first synthesized by a two-stage, high-energy/low-energy mechanical alloying process. The powder was then packed into silver tubes and formed into tapes by drawing and biaxial (Turk's-head) rolling. The precursor tapes were oxidized and converted into Ag-sheathed 2212 by heat treatment at 350-860 degree sign C in oxygen. Subsequent annealing at 897 degree sign C, followed by slow cooling and subsolidus annealing at 850 degree sign C, yielded 2212 grains with enhanced c-axis alignment. The resulting tapes exhibited average and maximum transport J{sub c} (4.2 K, self-field) values of 3.2x10{sup 4} and 6.8x10{sup 4} A/cm{sup 2}, respectively. (c) 2000 Materials Research Society.

• OSTI ID: 20216016
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 2 Vol. 15; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
EXPERIMENTAL DATA
FABRICATION
HEAT TREATMENTS
HIGH-TC SUPERCONDUCTORS
MICROSTRUCTURE
OXIDATION
SILVER
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
TEXTURE