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

The Korea Association of Crystal Growth (한국결정성장학회)
권호 표지

Generic studies on thermo-solutal convection of mercurous chloride system of ${Hg_2}{Cl_2}$ and Ne during physical vapor transport

  • Choi, Jeong-Gil (Department of Nano-Bio Chemical Engineering, Hannam University) ;
  • Lee, Kyong-Hwan (Climate Change Technology Research Division, Korea Institute of Energy Research) ;
  • Kim, Geug-Tae (Department of Nano-Bio Chemical Engineering, Hannam University)
  • Published : 2009.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

The effects of thermo-solutal convection on mercurous chloride system of ${Hg_2}{Cl_2}$, and Ne during physical vapor transport are numerically investigated for further understanding and insight into essence of transport phenomena, For $10\;K{\le}{\Delta}T{\le}30\;K$, the growth rate slowly increases and, then is decreased gradually until ${\Delta}T$=50 K, The occurrence of this critical point near at ${\Delta}T$=30 K is likely to be due to the effects of thermo-physical properties stronger than the temperature gradient corresponding to driving force for thermal convection. For the range of $10\;Torr{\le}P_B{\le}300\;Torr$, the rate is second order-exponentially decayed with partial pressures of component B, $P_B$. For the range of $5{\le}M_B{\le}200$, the rate is second order-exponentially decayed with a function of molecular weight of component B, $M_B$. Like the case of a partial pressure of component B, the effects of a molecular weight arc: reflected through the binary diffusivity coefficients, which are intimately related with suppressing the convection flow inside the growth enclosure, i,e., transition from convection to diffusion-dominant flow mode as the molecular weight of B increases. The convective mode is near at a ground level, i,e., on earth (1 $g_0$), and the convection is switched to the diffusion mode for $0.1\;g_0{\le}g{\le}10^{-2}g_0$, whereas the diffusion region ranges from $10^{-2}g_0$ up to $10^{-5}g_0$.

Keywords

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 https://doi.org/10.1016/0022-0248(86)90238-1
  3. S.J. Yosim and S.W. Mayer, "The mercury-mercuric chloride system", J. Phys. Chem. 60 (1960) 909 https://doi.org/10.1021/j100836a023
  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. W.M.B. Duval, "Convection in the physical vapor transport process-- I: Thermal convection:, J. Chem. Vapor Deposition 2 (1994a), 188
  15. W.M.B. Duval, "Convection in the physical vapor transport process-- II: Thermosolutal convection", J. Chem. Vapor Deposition 2 (1994b), 282
  16. R.B. Bird, W.E. Stewart and E.N. Lightfoot, "Transport Phenomena" (John Wiley and Sons, New York, NY, 1960)
  17. C. Mennetrier and W.M.B. Duval, "Thermal-solutal convection with conduction effects inside a rectangular enclosure", NASA Technical Memorandum 105371 (1991)
  18. S.V. Patankar, "Numerical Heat Transfer and Fluid Flow" (Hemisphere Publishing Corp., Washington D.C., 1980)
  19. 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)
  20. 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)
  21. G.T. Kim, "Convective-diffusive transport in mercurous chloride (Hg$_2$Cl$_2$) crystal growth", J. Ceramic Processing Research 6(2005) 110