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Al2O3 additions for isothermal melt processing of Bi2Sr2CaCu2Oy

Published online by Cambridge University Press:  31 January 2011

T.G. Holesinger
T.G. Holesinger
Affiliation:
Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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Abstract

It is shown that additions of Al2O3 (1.0 wt. %) can significantly aid in the isothermal melt processing of Bi2Sr2CaCu2Oy (Bi-2212). Al2O3 additions provide a means for grain refinement of phases present in the partial melt. By limiting grain growth in the partial melt, solidification to form Bi-2212 proceeds more efficiently, resulting in fewer secondary phases and improved transport properties. Aluminum does not substitute into the superconducting phase to any appreciable extent and is present in fully processed material as small, secondary grains of approximate composition Sr2−xCaxAlOy or Bi2Sr4−xCaxAl3Oy · Al2O3 additions were applied to the isothermal melt processing of Bi-2212 thick films and current leads.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 9 , September 1996 , pp. 2135 - 2141
Copyright
Copyright © Materials Research Society 1996

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References

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