OXYGEN-EXCHANGE STUDY IN PHASE-TRANSFORMATIONS OF SUPERCONDUCTING BISMUTH CUPRATES (PB2212 AND PB2223)

Authors
MANSORI M FAVOTTO C JARDET K ROUBIN M SEBAOUN A SATRE P
Citation
M. Mansori et al., OXYGEN-EXCHANGE STUDY IN PHASE-TRANSFORMATIONS OF SUPERCONDUCTING BISMUTH CUPRATES (PB2212 AND PB2223), Journal of thermal analysis, 50(3), 1997, pp. 401-407
Citations number
9
Categorie Soggetti
Chemistry Analytical
Journal title
Journal of thermal analysis → ACNP
ISSN journal
03684466
Volume
50
Issue
3
Year of publication
1997
Pages
401 - 407
Database
ISI
SICI code
0368-4466(1997)50:3<401:OSIPOS>2.0.ZU;2-3
Abstract
The oxygen exchange between the condensed phase(s) and the gas phase w as studied as a function of temperature for superconducting phases of the system (Bi,Pb)-Sr-Ca-Cu-O. An oxygen probe apparatus allowed confi rmation that the variation in oxygen composition in the Pb2212 and Pb2 223 superconducting phases is a reversible phenomenon on heating and c ooling. It was demonstrated that the mass loss of both phases, for the 905 and 980 degrees C isotherms, was due to the oxygen composition va riation and to PbO loss (this latter phenomenon begin irreversible).