STUDY OF THE EFFECT OF THE SR CA RATIO ON THE MICROSTRUCTURE AND CRITICAL-CURRENT DENSITY OF BSCCO-2212 AG-SHEATHED TAPES/

Authors
ZHANG W PUPYSHEVA OV MA Y POLAK M HELLSTROM EE LARBALESTIER DC
Citation
W. Zhang et al., STUDY OF THE EFFECT OF THE SR CA RATIO ON THE MICROSTRUCTURE AND CRITICAL-CURRENT DENSITY OF BSCCO-2212 AG-SHEATHED TAPES/, IEEE transactions on applied superconductivity, 7(2), 1997, pp. 1544-1547
Citations number
7
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on applied superconductivity → ACNP
ISSN journal
10518223
Volume
7
Issue
2
Year of publication
1997
Part
2
Pages
1544 - 1547
Database
ISI
SICI code
1051-8223(1997)7:2<1544:SOTEOT>2.0.ZU;2-X
Abstract
The effect of the Sr/Ca ratio and Bi content on the microstructure and J(c) of Ag-sheathed 2212 tapes was studied, Changing the Sr/Ca ratio changed the melting temperature of 2212 phase, the phase assemblage in the melt, and the nonsuperconducting phases in the fully processed ta pe, In tapes with Sr/Ca=2.75, the 2201 phase crystallizes from the mel t before 2212 during cooling, and this 2201 remains in the microstruct ure. In tapes with Sr/Ca=1.3, there is more liquid left after cooling, and it converts to 2201 as the tape cools to room temperature, Fully processed tape with overall composition 2.1:2:1:2 had the most homogen eous microstructure and highest J(c).