HOT-PRESSING OF BI(PB)-SR-CA-CU-O SUPERCONDUCTING PELLETS

Authors
PACHLA W KOVAC P HUSEK I
Citation
W. Pachla et al., HOT-PRESSING OF BI(PB)-SR-CA-CU-O SUPERCONDUCTING PELLETS, Superconductor science and technology, 7(11), 1994, pp. 820-823
Citations number
15
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter
Journal title
Superconductor science and technology → ACNP
ISSN journal
09532048
Volume
7
Issue
11
Year of publication
1994
Pages
820 - 823
Database
ISI
SICI code
0953-2048(1994)7:11<820:HOBSP>2.0.ZU;2-B
Abstract
Dense and 2223 single-phase bulk bars of similar to 0.3 mm(2) cross-se ction 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 obt ained for preliminary annealing of duration 100-120 h and subsequent h ot pressing under a pressure of similar or equal to 25 MPa, and 80 h a t a temperature of 850 degrees C for both processes, that resulted in highest contact measured value of J(c) = 11500 A cm(-2) at 77 K and 0 T.