Experimental results demonstrate changes in the external morphology of sillenite compounds grown by the Czochraiski 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.
Bibliographical noteFunding Information:
The authors gratefully acknowledge Dr. M.D. Serrano for discussion and comments. This work has been partially supported by projects ESP95-0148 (CICYT, Spain) and AE00235/95 (C.A.M., Spain). Computational resources were provided by the University of Minnesota Supercomputer Institute and the Army High Performance Computing Research Center under the auspices of the Department of the Army, Army Research Laboratory cooperative agreement DAAH04-95-2-0003/contract DAAH04-95-C-0008, the content of which does not necessarily reflect the position or policy of the government, and no official endorsement should be inferred.
- Czochralski growth
- Heat transfer