Layered Structure and Superconducting Properties of Ag-Sheathed Bi 1.84 Pb 0.34 Sr 2 Ca 2 Cu 3 O y Wires Prepared by Combined Jellyroll and Hotextrusion Technique

The superconducting wires were prepared by hotextrusion of a billet of jellyroll form. The wire exhibited a layered structure of Ag and Bi2223 oxide. Critical current density ( J c ) increased with decreasing diameter of extrusion die and the highest J c value for the wire with 2 mm diameter is 3200...

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Published inJapanese Journal of Applied Physics Vol. 33; no. 3A; p. L308
Main Authors Matsuzaki, Kunio, Shimizu, Kohichi, Akihisa Inoue, Akihisa Inoue, Tsuyoshi Masumoto, Tsuyoshi Masumoto
Format Journal Article
LanguageEnglish
Published 01.03.1994
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Summary:The superconducting wires were prepared by hotextrusion of a billet of jellyroll form. The wire exhibited a layered structure of Ag and Bi2223 oxide. Critical current density ( J c ) increased with decreasing diameter of extrusion die and the highest J c value for the wire with 2 mm diameter is 3200 A/cm 2 at 77 K and 18000 A/cm 2 at 4.2 K. These rather high J c values are due to the increase of the interface area between Ag and oxide resulting from the decrease in the thickness of the oxide layer. This method seems to be a useful way of obtaining the superconducting wire with a round shape for the Bi2223 oxide.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.33.L308