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Influence of Lead in the Processing of High‐Temperature 2223 Bi─Sr─Ca─Cu─O Superconductor
Author(s) -
Tripathi Ramesh B.,
Johnson David W.
Publication year - 1991
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.1151-2916.1991.tb07329.x
Subject(s) - materials science , vaporization , ceramic , quenching (fluorescence) , sintering , reproducibility , analytical chemistry (journal) , diffraction , superconductivity , metallurgy , chemistry , chromatography , physics , organic chemistry , quantum mechanics , optics , fluorescence
Difficulty in reproducibility of results has often been encountered in the Pb‐doped 2223 Bi─Sr─Ca─Cu─O superconductor compound due to lead vaporization in samples prepared by standard ceramic methods. Various processing parameters such as quenching, slow cooling, or closed vs open sintering containers were found to affect the properties significantly in samples prepared by standard ceramic methods. In contrast, samples prepared by spray‐drying of nitrate solutions were very homogeneous and reproducible because of the rapid and uniform reaction of Pb with other constituents. The magnetic susceptibility and X‐ray diffraction data remained unchanged for spray‐dried samples processed with or without quenching and sintered in open or closed containers.