simulation of BGO single crystal growth by improved low thermal gradient (LTG) Czochralski

Document Type : Full length research Paper

Authors

1 buali sina hamedan

2 Buali Sina univercity

3 malek ashtar univercity

Abstract

]In this paper has been simulated the temperature field and flows during different stages of low thermal gradient (LTG) Czochralski single crystal growth and using the resistive heating system has been simulated and the quality of grown crystal has been investigated using the thermal stress at the different heights has been investigated. The configuration of the used growth furnace in this system is in accordance with a real system in the lab and is consists of a cylindrical ceramic tube, a heat shield and three element heat zones with different radius to generate and control the low temperature gradient. The surface to surface and internal radiation heat transfer has been considered in system. The results of simulation and its adaptation to experimental data show that the low temperature gradient and specific configuration of the system leads to optimization of the crystal-melt interface, the reduction of thermal stresses and the improvement of the quality of the crystal grown.

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References

 
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Journal of Research on Many-body Systems
Volume 8, Issue 18
October 2018
Pages 23-33

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History

  • Receive Date: 20 December 2017
  • Revise Date: 05 April 2018
  • Accept Date: 22 May 2018

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