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Diffusion model for the crystal growth of Pr1+xBa2−xCu3O7–δ by the top seeded crystal pulling method

Published online by Cambridge University Press:  31 January 2011

Minoru Tagami ,
Takateru Umeda  and
Yuh Shiohara
Minoru Tagami
Affiliation:
SRL-ISTEC, 1–10–13 Shinonome, Koto-ku, Tokyo 135, Japan
Takateru Umeda
Affiliation:
Department of Metallurgy, School of Engineering, The University of Tokyo, 7–3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Yuh Shiohara
Affiliation:
SRL-ISTEC, 1–10–13 Shinonome, Koto-ku, Tokyo 135, Japan
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Abstract

A solidification model for Pr1+xBa2−xCu3O7−δ ternary oxides by the top seeded crystal pulling (SRL–CP: Solute Rich Liquid–Crystal Pulling) method is presented in which the composition of the grown single crystals is estimated from the starting composition in the crucible. This model involves the diffusion flux balance of each element at the growth interface in the liquid considering equilibrium tie-lines in the PrOy–BaO–CuO ternary phase diagram which have been obtained experimentally. The self-diffusion coefficient for Pr and the interdiffusivities for Ba and Cu in the liquid are used in this model because this liquid is a dilute solution for Pr. The calculated results are in good agreement with the experimental ones.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 11 , November 1997 , pp. 2880 - 2888
Copyright
Copyright © Materials Research Society 1997

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References

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