Fabrication of stable superconductive wires with YBa2Cu 3Ox/Ag2O composite core

S. Sen, In-Gann Chen, C. H. Chen, D. M. Stefanescu

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

The problem of maintaining the oxygen stoichiometry of the Y 1Ba2Cu3Ox (the so-called 123) compound at the desired level of x=6.0±0.1 when fabricating superconducting wires using the powder-in-tube method is addressed. A solution to this problem appears to be incorporating an unstable oxide like Ag 2O in the core material, such that it acts as an in situ oxygen donor during the final sintering or annealing stage. Moreover, the segregation of Ag at the grain boundaries of the 123 grains and at the porosities seems to be a possible reason for the considerable improvement of the critical current density Jc of these wires. The effect of processing parameters, like different sintering temperatures and addition of various percentages of either Ag or Ag2O, is presented. Finally, in order to test conservation of superconductive properties during handling, the wires were subjected to different degrees of bending, and the subsequent effect on superconducting transition temperature, Tc and Jc, is reported.

Original languageEnglish
Pages (from-to)766-768
Number of pages3
JournalApplied Physics Letters
Volume54
Issue number8
DOIs
Publication statusPublished - 1989 Dec 1

Fingerprint

wire
fabrication
composite materials
sintering
oxygen
conservation
stoichiometry
critical current
grain boundaries
transition temperature
current density
tubes
porosity
annealing
oxides
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Sen, S. ; Chen, In-Gann ; Chen, C. H. ; Stefanescu, D. M. / Fabrication of stable superconductive wires with YBa2Cu 3Ox/Ag2O composite core. In: Applied Physics Letters. 1989 ; Vol. 54, No. 8. pp. 766-768.
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Fabrication of stable superconductive wires with YBa2Cu 3Ox/Ag2O composite core. / Sen, S.; Chen, In-Gann; Chen, C. H.; Stefanescu, D. M.

In: Applied Physics Letters, Vol. 54, No. 8, 01.12.1989, p. 766-768.

Research output: Contribution to journalArticle

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