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Synthesis and Properties of the High Tc Bi-Pb-Sr-Ca-Cu-O Superconductors

Published online by Cambridge University Press:  21 February 2011

Utako Endo ,
J. Koyama ,
T. Kawai ,
N. Okazaki ,
K. Kitazawa  and
Y. Matsui
Utako Endo
Affiliation:
Daikin Industries Ltd., 1–1 Nishi-hitotsuya, Settsu, Osaka 566, Japan
J. Koyama
Affiliation:
Daikin Industries Ltd., 1–1 Nishi-hitotsuya, Settsu, Osaka 566, Japan
T. Kawai
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, 8–1 Mihogaoka, Ibaraki, Osaka 567, Japan
N. Okazaki
Affiliation:
University of Tokyo, Dept. of Industrial Chemistry, 7–3–1 Honga, Bunkyo-ku, Tokyo 113, Japan
K. Kitazawa
Affiliation:
University of Tokyo, Dept. of Industrial Chemistry, 7–3–1 Honga, Bunkyo-ku, Tokyo 113, Japan
Y. Matsui
Affiliation:
National Institute for Research in Inorganic Materials, 1–1 Namiki, Tsukuba, Ibaraki 305, Japan
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Abstract

A single high Tc phase of Bi-Pb-Sr-Ca-Cu-O superconductor was obtained by following proper synthetic conditions:(a)addition of Pb, (b)proper starting composition, (c)codecomposition method, (d)sintering under low oxygen partial pressure and (e)long sintering. The composition analysis showed that every atomic site might be occupied by some element and there might not be defects or excess atoms in the structure. The hole donor in these samples is considered to be Pb on the Bi site and hole concentration seems to be, to some extent, controlled by the Pb content. A phase with four CuO2 layers have possibly grown on the surface of the grains of thi high Tc phase.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 156: Symposium M – High Temperature Superconductors: Relationships Between Properties, Structure, and Solid State Chemistry , 1989 , 267
Copyright
Copyright © Materials Research Society 1989

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References

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