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Relation of Constituents with Superconducting Characteristics in Low-Temperature-Preheated YBCO Ceramics

Published online by Cambridge University Press:  26 February 2011

Junya Nishino ,
Hiroaki Nishikawa ,
Muneo Ayabe  and
Yuji Ikegami
Junya Nishino
Affiliation:
Research Institute, Ishikawajima-Harima Heavy Industries Co. Ltd., 3–1–15 Toyosu Koto-Ku Tokyo, 135, Japan.
Hiroaki Nishikawa
Affiliation:
Research Institute, Ishikawajima-Harima Heavy Industries Co. Ltd., 3–1–15 Toyosu Koto-Ku Tokyo, 135, Japan.
Muneo Ayabe
Affiliation:
Research Institute, Ishikawajima-Harima Heavy Industries Co. Ltd., 3–1–15 Toyosu Koto-Ku Tokyo, 135, Japan.
Yuji Ikegami
Affiliation:
Research Institute, Ishikawajima-Harima Heavy Industries Co. Ltd., 3–1–15 Toyosu Koto-Ku Tokyo, 135, Japan.
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Abstract

YBCO bulk ceramics pre-heated at low temperature before sintering were studied on the structure and superconducting properties mainly by varying the concentration of Ba/Y ratio.

At 15.8–16.2wt% of the oxygen content Oc calcurated from the compositions of yttrium, barium and copper on the assumption that the valence of copper is 2, (123) phase is main and critical temperature(Tc) and critical current density(Jc) reach to 88–90K and about 103A/cm2, respectively.

It is presumed that there is a possibility of the exixtence of oxygen deficient and disordered phase in addition to (123) and (211) phases and BaCuO2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 275: Symposium S – Layered Superconductors: Fabrication, Properties and Applications , 1992 , 489
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCE

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