✦ LIBER ✦

AC energy dissipation in high-Tc superconductors

✍ Scribed by S. Zannella; L. Jansak; M. Majoros; V. Selvamanickam; K. Salama

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 461 KB
Volume: 205
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(93)90163-k

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✦ Synopsis

The AC energy dissipation of high-2~, superconducting wires is an important factor which will determine the feasibilit.~ ol highpower transmission lines using these materials. To obtain a better understanding of AC power loss mechanisms and to determine if their level is acceptable for this application, the losses of Y-and Bi-based samples, prepared by' different processes, were measured at 77 K when carrying an alternating current or subjected to a time-varying magnetic field. Hysteresis was tbund to be thc dominant mechanism and the critical state model well describes the experimental results of the weak-link-flee samples. Melttexturing processes greatly reduce the granularity behavior and the AC losses.

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