Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Effects of inert gas (Ne) on thermal convection of mercurous chloride system of $Hg_2Cl_2$ and Ne during physical vapor transport

  • Choi, Jeong-Gil (Department of Nano-Bio Chemical Engineering, Hannam University) ;
  • Lee, Kyong-Hwan (Clean Energy Research Department, Korea Institute of Energy Research) ;
  • Kim, Geug-Tae (Department of Nano-Bio Chemical Engineering, Hannam University)
  • Published : 2008.12.31
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Abstract

For an aspect ratio (transport length-to-width) of 5, Pr=1.13, Le=1.91, Pe=4.3, Cv=1.01, $P_B=20\;Torr$, the effects of addition of inert gas Ne on thermally buoyancy-driven convection ($Gr=2.44{\times}10^3$) are numerically investigated for further understanding and insight into essence of transport phenomena in two dimensional horizontal enclosures. For $10K{\leq}{\Delta}T{\leq}50\;K$, the crystal growth rate increases from 10 K up to 20 K, and then is slowly decreased until ${\Delat}T=50\;K$, which is likely to be due to the effects of thermo-physical properties stronger than the temperature gradient corresponding to driving force for thermal convection. The dimensional maximum velocity gratitude reflecting the intensity of thermal convection is directly and linearly proportional to the temperature difference between the source and crystal regions. The rate is first order-exponentially decreased for $2{\leq}Ar{\leq}5$. This is related to the finding that the effects of side walls tend to stabilize convection in the growth reactor. In addition, the rate is first order exponentially decayed for $10{\leq}P_B{\leq}200\;Torr$.

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References

  1. N.B. Singh, M. Gottlieb, G.B. Brandt, A.M. Stewart, R. Mazelsky and M.E. Glicksman, "Growth and characterization of mercurous halide crystals:mercurous bromide system" , J. Crystal Growth 137 (1994) 155 https://doi.org/10.1016/0022-0248(94)91265-3
  2. N.B. Singh, R.H. Hopkins, R. Mazelsky and J.J. Conroy, "Purification and growth of mercurous chloride single crystals" , J. Crystal Growth 75 (1970) 173
  3. S.J. Yosim and S.W. Mayer, "The mercury-mercuric chloride system" , J. Phys. Chem. 60 (1960) 909
  4. F. Rosenberger, "Fluid dynamics in crystal growth from vapors," Physico-Chemical Hydro-dynamics 1 (1980)
  5. N.B. Singh, M. Gottlieb, A.P. Goutzoulis, R.H. Hopkins and R. Mazelsky, "Mercurous Bromide acoustooptic devices" , J. Crystal Growth 89 (1988) 527 https://doi.org/10.1016/0022-0248(88)90215-1
  6. B.L. Markham, D.W. Greenwell and F. Rosenberger, "Numerical modeling of diffusive-convective physical vapor transport in cylindrical vertical ampoules" , J. Crystal Growth 51 (1981) 426 https://doi.org/10.1016/0022-0248(81)90419-X
  7. W.M. B. Duval, "Convection in the physical vapor transport process-- I: Thermal" , J. Chemical Vapor Deposition 2 (1994) 188
  8. A. Nadarajah, F. Rosenberger and J. Alexander, "Effects of buoyancy-driven flow and thermal boundary conditions on physical vapor transport", J. Crystal Growth 118 (1992) 49 https://doi.org/10.1016/0022-0248(92)90048-N
  9. H. Zhou, A. Zebib, S. Trivedi and W.M.B. Duval, "Physical vapor transport of zinc-telluride by dissociative sublimation", J. Crystal Growth 167 (1996) 534 https://doi.org/10.1016/0022-0248(96)00305-3
  10. F. Rosenberger, J. Ouazzani, I. Viohl and N. Buchan, "Physical vapor transport revised", J. Crystal Growth 171 (1997) 270 https://doi.org/10.1016/S0022-0248(96)00717-8
  11. N.B. Singh, R. Mazelsky and M.E. Glicksman, "Evaluation of transport conditions during PVT: mercurous chloride system", PhysicoChemical Hydrodynamics 11 (1989) 41
  12. F. Rosenberger and G. Müller, "Interfacial transport in crystal growth, a parameter comparison of convective effects", J. Crystal Growth 65 (1983) 91 https://doi.org/10.1016/0022-0248(83)90043-X
  13. M. Kassemi and W.M.B. Duval, "Interaction of surface radiation with convection in crystal growth by physical vapor transport", J. Thermophys. Heat Transfer 4 (1989) 454
  14. R.B. Bird, W.E. Stewart and E.N. Lightfoot, Transport Phenomena (John Wiley and Sons, New York, NY, 1960)
  15. C. Mennetrier and W.M.B. Duval, Thermal-solutal convection with conduction effects inside a rectangular enclosure, NASA Technical Memorandum 105371 (1991)
  16. S.V. Patankar, Numerical Heat Transfer and Fluid Flow (Hemisphere Publishing Corp., Washington D.C., 1980)
  17. N.B. Singh and W.M.B. Duval, Growth kinetics of physical vapor transport processes: crystal growth of the optoelectronic material mercurous chloride, NASA Technical Memorandum 103788 (1991)
  18. C. Mennetrier, W.M.B. Duval and N.B. Singh, Physical vapor transport of mercurous chloride under a nonlinear thermal profile, NASA Technical Memorandum 105920 (1992)
  19. G.T. Kim, "Convective-diffusive transport in mercurous chloride $(Hg_2Cl_2)$ crystal growth", J. Ceramic Processing Research 6 (2005) 110
  20. I. Catton, "Effect of wall conducting on the stability of a fluid in a rectangular region heated from below", J. Heat Transfer 94 (1972) 446 https://doi.org/10.1115/1.3449966