Abstract
Experimental results demonstrate changes in the external morphology of sillenite compounds grown by the Czochralski method. To explain these observations, a numerical model of heat transfer which accounts for radiative cooling and melt convection is applied to this system. Delicate shifts in the balance of heat transfer mechanisms during crystal growth and their resulting effects on the temperature distribution at the melt free surface correlate well the changes in external crystal morphology and provide a mechanistic explanation for the experimental results.
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