When the new YBaCuO superconductors were developed about 18 years ago, the critical maximum current density, at a magnetic field of 1.0 T and at a temperature of 77 K, was still quite low. Roughly 8 years ago, it became possible to raise the critical current density to 106 A/cm2 at 1.0 T and 77 K. This opened up possibilities for applications in self-stabilizing superconducting magnetic bearings and also in maglev trains capable of movement along a track. An important criterion in the high current-carrying capacity of YBaCuO superconductors is the excellent texture of melt-textured YBaCuO moldings, which also must be free of microcracks. Narrow distributions of the a-, b-, and c-axis orientations, in the absence of of isotropic fractions, allow almost the entire mirror flux in the superconductor to be induced by permanent magnets.
High T(c) superconductors give new impulse to magnetic levitation
Supraleiter mit hoher Sprungtemperatur geben neue Impulse für die magnetische Schwebetechnik
Advanced Engineering Materials ; 3 , 5 ; 319-324
2001
6 Seiten, 7 Bilder, 27 Quellen
Article (Journal)
English
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