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Hip Phase Diagram of YBCO Type Superconductor

Published online by Cambridge University Press:  15 February 2011

Yuichi Sawai ,
K. Ishizaki ,
M. Takata ,
A. Kuzjukevics  and
Y. Narukawa
Yuichi Sawai
Affiliation:
Nagaoka University of Technology, Nagaoka, Niigata 940–21, Japan
K. Ishizaki
Affiliation:
Nagaoka University of Technology, Nagaoka, Niigata 940–21, Japan
M. Takata
Affiliation:
Nagaoka University of Technology, Nagaoka, Niigata 940–21, Japan
A. Kuzjukevics
Affiliation:
Nagaoka University of Technology, Nagaoka, Niigata 940–21, Japan
Y. Narukawa
Affiliation:
Kobe Steel Co., Ltd., Kobe, Hyogo 651, Japan
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Abstract

The oxygen partial pressure - temperature phase diagram of YBCO type superconductors reported before by us showed that the YBa2Cu4Ox phase formation from Y2Ba4Cu7Oz with CuO, as well as from YBa2Cu3Oy, with CuO are oxidation reactions. The total gas pressure - temperature phase diagram shows that the YBa2Cu4Ox, phase formation temperature from Y2Ba4Cu7Oz with CuO increases with increasing the total gas pressure. On this phase boundary line, the fugacity of oxygen increases with increasing the total gas pressure even at constant oxygen partial pressure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 251: Symposium S – Pressure Effects on Materials Processing and Design , 1991 , 307
Copyright
Copyright © Materials Research Society 1992

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References

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