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Studies of theoretical and experimental precipitation conditions of Y+3, Ba+2, and Cu+2 ions in oxalate-diethylamine media in the preparation of YBa2Cu3Oy superconductor

Published online by Cambridge University Press:  31 January 2011

D.H. Chen ,
S.R. Sheen ,
C.T. Chang ,
C.Y. Shei  and
W-M. Hurng
D.H. Chen
Affiliation:
Department of Chemistry, National Tsing Hua University, Hsinchu, and Institute of Atomic and Molecular Science, Academia Sinica, Taipei, P.O. Box 23-166, Taiwan, Republic of China
S.R. Sheen
Affiliation:
Department of Chemistry, National Tsing Hua University, Hsinchu, and Institute of Atomic and Molecular Science, Academia Sinica, Taipei, P.O. Box 23-166, Taiwan, Republic of China
C.T. Chang
Affiliation:
Department of Chemistry, National Tsing Hua University, Hsinchu, and Institute of Atomic and Molecular Science, Academia Sinica, Taipei, P.O. Box 23-166, Taiwan, Republic of China; and Materials Research Laboratories, Industrial Technology Research Institute, Chutung, Hsinchu 31015, Taiwan, Republic of China
C.Y. Shei
Affiliation:
Materials Research Laboratories, Industrial Technology Research Institute, Chutung, Hsinchu 31015, Taiwan, Republic of China
W-M. Hurng
Affiliation:
Materials Research Laboratories, Industrial Technology Research Institute, Chutung, Hsinchu 31015, Taiwan, Republic of China
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Abstract

In the preparation of YBa2Cu3Oy (Y-123) superconductor, the coprecipitation method was frequently used in various solution systems due to advantages such as good homogeneity, low reaction temperature, fine and uniform particle size, easy scale-up, and economical concerns. In this paper, a detailed study of different competitive reactions such as dissociation, precipitation, complex formation, and association involving metal ions, oxalate ion, and diethylamine species is performed. The study aids in understanding the precipitation and yields an optimal coprecipitation condition for the title system. A series of experiments are also conducted which confirm that the as-derived optimal condition may be extensively applied to other systems.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 9 , September 1992 , pp. 2317 - 2323
Copyright
Copyright © Materials Research Society 1992

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