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Effect of Ambient Atmosphere on YBa2Cu3O7-y

Published online by Cambridge University Press:  28 February 2011

H. S. Horowitz ,
R. K. Bordia ,
R. B. Flippen  and
R. E. Johnson
H. S. Horowitz
Affiliation:
Central Research and Development Department, E. I. du Pont de Nemours and Company, Experimental Station, Wilmington, Delaware 19898
R. K. Bordia
Affiliation:
Central Research and Development Department, E. I. du Pont de Nemours and Company, Experimental Station, Wilmington, Delaware 19898
R. B. Flippen
Affiliation:
Central Research and Development Department, E. I. du Pont de Nemours and Company, Experimental Station, Wilmington, Delaware 19898
R. E. Johnson
Affiliation:
Central Research and Development Department, E. I. du Pont de Nemours and Company, Experimental Station, Wilmington, Delaware 19898
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Extract

The reactivity of sintered samples of YBa2Cu3O7-y with moisture at elevated temperatures has recently been reported [1]. The reaction sequence proposed was:

Such instability of the 1–2–3 phase has serious implications regarding not only the use of the sintered material, but powder processing as well. While the need for fine particle 1–2–3 powder exhibiting good sinterability is recognized, it is also anticipated that the degradation of this material will accelerate with decreasing particle size because of the larger surface area. Thus, we have conducted a series of experiments to monitor the effect of ambient atmosphere on fine particle 1–2–3 powder. The powder was monitored as a function of time by x-ray diffraction, scanning electron microscopy, sintering characteristics and magnetic flux exclusion.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 903
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

1. Yan, M. F., Barns, R. L., O'Bryan, H. M. Jr, Gallagher, P. K., Sherwood, R. C. and Jin, S., Appl. Phys. Lett. 51(7), 532–534 (1987).Google Scholar
2. Horowitz, H. S., Subramanian, M. A., Michel, J. B., McCarron, E. M., Torardi, C. C, Bordia, R. K. and Chowdhry, U., presented at the Amer. Ceram. Soc. Electronics Div. Meeting, Denver, CO 1987 (unpublished).Google Scholar
3. Bordia, R. K. and Raj, R., Comm. of Am. Ceram. Soc. 69 (3), C55–C57 (1986).Google Scholar