Abstract
Repetitive temperature cycles may cause the damage in the superconducting bulk, and thus the effect of repetitive temperature change was studied. A Bi-2223/Ag wires composite bulk was prepared by stacking the calcined powder and pure Ag wires alternately followed by sintering. The specimen was exposed to the repetition of temperature changes between 77 and 300 K up to 400 times. Homogeneous external magnetic field generated by Helmholtz coils was applied at each cycle, and the surrounding magnetic fields were measured. The shielding effect was evaluated by the integration of the flux density and the standardization by the value in the normal conducting state. The shielding effects were compared with those for sintered BSCCO specimen without Ag. Degradation was small in the Bi-2223/Ag wires composite bulk. (C) 2002 Elsevier Science B.V. All rights reserved.
| Translated title of the contribution | Degradation of Bi-2223/Ag-wires composite bulk exposed to repetitive temperature change |
|---|---|
| Original language | American English |
| Pages (from-to) | 838 - 841 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 378 |
| Issue number | Part I |
| DOIs | |
| State | Published - Oct 2002 |