Superconductive aluminum/YBa2Cu3Ox composites stabilized by oxygen/fluorine donors
- 18 April 1988
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 52 (16), 1355-1357
- https://doi.org/10.1063/1.99686
Abstract
A fabrication technique for producing bulk and irregular-shaped aluminum/high Tc superconductor composites by traditional powder metallurgy method is reported. During the course of fabrication, the oxygen stoichiometry can be maintained at the desired level in order to retain superconductivity by addition of certain metal oxides or metal carbonates with low oxidation tendency, e.g., Ag2O, Ag2CO3, and CdO. Moreover, replacement of oxygen with fluorine is also possible by addition of certain unstable fluorides like AgF. Superconductivity measurements of Al/YBa2Cu3Ox random composites with additions of different oxygen or fluorine donors show a similiar or improved Tc in comparison to the pure 123 compound. The concept of oxygen/fluorine donor can also be used in other fabrication techniques of metal/123 composites to stabilize the oxygen/fluorine stoichiometry.Keywords
This publication has 11 references indexed in Scilit:
- Shock-Induced Microstructures in Explosively Fabricated SuperconductorsJOM, 1988
- Single-phase 60-K bulk superconductor in annealed with correlated oxygen vacancies in the Cu-O chainsPhysical Review B, 1987
- Fabrication of dense Ba2YCu3O7−δ superconductor wire by molten oxide processingApplied Physics Letters, 1987
- High T C superconductors—composite wire fabricationApplied Physics Letters, 1987
- Fabrication of Ceramic Articles from High TcSuperconducting OxidesAdvanced Ceramic Materials, 1987
- Superconductivity at 155 KPhysical Review Letters, 1987
- Superconductivity above 90 K in the square-planar compound system A with A=Y, La, Nd, Sm, Eu, Gd, Ho, Er and LuPhysical Review Letters, 1987
- Effect of Oxygen Deficiency on the Crystal Structure and Superconducting Properties of the Ba2YCu3OyJapanese Journal of Applied Physics, 1987
- Bulk superconductivity at 91 K in single-phase oxygen-deficient perovskitePhysical Review Letters, 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987