Hot pressing of Bi(Pb)-Sr-Ca-Cu-O superconducting pellets
- 1 November 1994
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 7 (11) , 820-823
- https://doi.org/10.1088/0953-2048/7/11/008
Abstract
Dense and 2223 single-phase bulk bars of approximately 0.3 mm2 cross-section were fabricated by uniaxial hot pressing. Effects of preliminary annealing and intermediate grinding on the properties of hot pressed bars are discussed. Optimal structure and physical properties were obtained for preliminary annealing of duration 100-120 h and subsequent hot pressing under a pressure of approximately=25 MPa, and 80 h at a temperature of 850 degrees C for both processes, that resulted in highest contact measured value of Jc=11500 A cm-2 at 77 K and 0 T.Keywords
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