Abstract
During melt growth of bulk crystals, convection in the melt plays a critical role in the quality of the grown crystal. Convection in the melt can be induced by buoyancy force, rotation, surface tension gradients, etc., and these usually coexist and interact with one another. The dominant convection mode is also different for different growth configurations and operation conditions. Due to the complexity of the hydrodynamics, the control of melt convection is nontrivial and requires a better understanding of the melt flow structures. Finding a proper growth condition for optimum melt flow is difficult and the operation window is often narrow. Therefore, to control the convection effectively, external forces, such as magnetic fields and accelerated rotation, are used in practice. In this chapter, we will first discuss the convections and their effects on the interface morphology and segregation for some melt growth configurations. The control of the flows by external forces will also be discussed through some experimental and simulation results.
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Abbreviations
- 2-D:
-
two-dimensional
- 3-D:
-
three-dimensional
- ACRT:
-
accelerated crucible rotation technique
- AVT:
-
angular vibration technique
- CZ:
-
Czochralski
- EMCZ:
-
electromagnetic Czochralski
- FZ:
-
floating zone
- HB:
-
horizontal Bridgman
- HZM:
-
horizontal ZM
- LES:
-
large-eddy simulation
- SCN:
-
succinonitrile
- VB:
-
valence band
- VB:
-
vertical Bridgman
- ZM:
-
zone-melting
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Lan, CW. (2010). Convection and Control in Melt Growth of Bulk Crystals. In: Dhanaraj, G., Byrappa, K., Prasad, V., Dudley, M. (eds) Springer Handbook of Crystal Growth. Springer Handbooks. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74761-1_36
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