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Rapid Formation of the Textured (Bi, Pb) 2 (Sr, Ca) 4 Cu 3 Oy Superconductor by Multiple Pressing and Sintering Process
Author(s) -
Sheen ShyangRoeng,
Wu MawKuen,
Shei ChengYie,
Hurng WeirMirn,
Chen DianHau,
Chang ChauTing
Publication year - 1996
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199600047
Subject(s) - sintering , coprecipitation , chemistry , scanning electron microscope , isothermal process , microstructure , phase (matter) , oxalate , superconductivity , x ray crystallography , metallurgy , analytical chemistry (journal) , crystallography , diffraction , mineralogy , materials science , inorganic chemistry , composite material , condensed matter physics , thermodynamics , physics , organic chemistry , chromatography , optics
Abstract A superconducting (Bi, Pb) 2 (Sr, Ca) 4 Cu 3 O 2 material has been prepared by tbe oxalate coprecipitation method. The high‐Tc 110 K phase was effectively promoted by application of an intermediate grinding and pressing between the sintering heat treatments. The powder X‐ray diffraction shows the existence of single high‐Tc and high‐textured microstructures with strong (001) reflections within a short sintering time ( 18 h). The morphology of the sintered samples was examined by scanning electron microscopy (SEM). Also, the kinetics of the formation of the high‐Tc phase were investigated by the isothermal method. A possible mechanism of the formation of high‐Tc 2223 phase was proposed.