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Fundamental Material Aspects Underlying the Preparation of High‐Temperature Superconducting (Bi,Pb) 2+ x Sr 2 Ca 2 Cu 3 O 10+ d Ceramics
Author(s) -
Majewski Peter J.,
Kaesche Stefanie,
Aldinger Fritz
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb02960.x
Subject(s) - quinary , superconductivity , phase (matter) , high temperature superconductivity , materials science , analytical chemistry (journal) , ceramic , electrical resistivity and conductivity , mineralogy , condensed matter physics , chemistry , metallurgy , physics , organic chemistry , alloy , chromatography , quantum mechanics
Phase equilibria of the quasi‐quinary system Bi 3 O 3 ‐PbO‐SrO‐CaO‐CuO were studied between 650° and 900°C in air with emphasis on the high‐temperature superconducting phase (Bi,Pb) 2+ x Sr 2 Ca 2 Cu 3 O 10+ d (2223). The 2223 phase lies in equilibrium with a number of nonsuperconducting phases and also with the superconducting phase (Bi,Pb) 2 Sr 2 CaCu 2 O 8+ d (2212). The single‐phase region was found to be very limited. The Pb solubility of the 2223 phase is strongly temperature dependent. The phase relations are very sensitive to variations of the cation concentration and temperature. This effect significantly influences the preparation of 2223 ceramics.