JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Print ISSN : 0021-9592
Control of Crystal-Melt Interface Shape during Czochralski Growth of Oxide Single Crystals
Yasunori OkanoMasato TachibanaAko HatanoAkira Hirata
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1989 Volume 22 Issue 4 Pages 389-394

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Abstract

The control of crystal-melt interface shape by crystal rotation rate during Czochralski growth of oxide single crystals was theoretically studied. Effects of the melt properties and operational conditions on the critical crystal rotation rate at which the crystal–melt interface becomes flat were clarified.
A method of evaluating the dominant convection in the melt was proposed. Applying this method to previous experimental results for the crystal-melt interface, it was suggested that in most of them Marangoni convection was more dominant than natural convection in the melt. It was shown that the results obtained in this study could adequately explain the previous experimental values of the critical crystal rotation rate.

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© 1989 The Society of Chemical Engineers, Japan
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