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Preparation of Superconducting Bi(Pb)‐Sr‐Ca‐Cu‐O Thick Films on Magnesia Substrate
Author(s) -
Kim Duk Hee,
Um Woo Sik,
No Kwangsoo,
Kim Ho Gi
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.tb08266.x
Subject(s) - calcination , sintering , materials science , annealing (glass) , superconductivity , analytical chemistry (journal) , phase (matter) , substrate (aquarium) , mineralogy , nuclear chemistry , chemical engineering , metallurgy , chemistry , chromatography , biochemistry , physics , organic chemistry , quantum mechanics , engineering , catalysis , oceanography , geology
Superconducting Bi(Pb)‐Sr‐Ca‐Cu‐O powders were prepared by the emulsion‐drying method The powders consisting of the low‐ T c phase (Bi(Pb) 2 Sr 2 Ca 1 Cu 2 O y ) and small amount of Ca 2 PbO 4 were prepared by calcining under low oxygen partial pressure at 750°, 800°C. These calcined powders were used to prepare thick films on single‐crystal MgO(100) substrates using a screen‐printing technique to study the effect of the calcinations temperature and annealing procedure on the high‐T c phase (Bi(Pb) 2 Sr 2 Ca 2 Cu 3 O y )formation. The formation of high‐T c phase was observed to be dependent on the calcinations conditions. The high‐ T c phase formed very quickly (sintering at 840°C for 4 h), and the best films showed a sharp superconducting transition at about 105 K.