Effect of steady crucible rotation on segregation in high-pressure vertical Bridgman growth of cadmium zinc telluride

Three-dimensional axisymmetric, time-dependent simulations of the high-pressure vertical Bridgman growth of large-diameter cadmium zinc telluride are performed to study the effect of steady crucible rotation on axial and radial segregation in the grown crystal. The model includes details of heat tra...

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Bibliographic Details
Published in:Journal of crystal growth 1999-05, Vol.203 (1), p.87-102
Main Authors: Yeckel, Andrew, Patrick Doty, F., Derby, Jeffrey J.
Format: Article
Language:English
Subjects:
Bridgman growth
Cadmium zinc telluride
Cross-disciplinary physics: materials science
rheology
Crucible rotation
Exact sciences and technology
Growth from melts
zone melting and refining
Materials science
Methods of crystal growth
physics of crystal growth
Physics
Rossby and Taylor numbers
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Summary:Three-dimensional axisymmetric, time-dependent simulations of the high-pressure vertical Bridgman growth of large-diameter cadmium zinc telluride are performed to study the effect of steady crucible rotation on axial and radial segregation in the grown crystal. The model includes details of heat transfer, melt convection, solid–liquid interface shape, and pseudo-binary zinc segregation. Imposing a moderate rotation rate of 10 rpm on the system slightly improves axial segregation but makes radial segregation much worse. Moreover, values of dimensionless thermal Rossby and Taylor numbers calculated for this system indicate that the baroclinic instability may occur at the rotation rates studied.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(99)00065-2