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

Authors
Journal
Journal of Crystal Growth
0022-0248
Publisher
Elsevier
Publication Date
Volume
203
Identifiers
DOI: 10.1016/s0022-0248(99)00065-2
Keywords
  • Crucible Rotation
  • Bridgman Growth
  • Cadmium Zinc Telluride
  • Rossby And Taylor Numbers

Abstract

Abstract 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.

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