Thermal Soret diffusion in the liquid phase epitaxial growth of binary III–V compounds

Chien, Chung‐Ping; Mattes, Brenton L.

doi:10.1116/1.582571

Cited by 7 publications

(4 citation statements)

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“…It is also found to affect crystallization of single crystals grown from melts containing a solute (Hurle & Jakeman 1971). This last assertion is confirmed by Chien & Mattes (1983) in a study of thermal (Soret) diffusion in the liquid-phase epitaxial growth of binary III-V compounds, like…”

Section: Introductionmentioning

confidence: 55%

Soret separation in a quasi-vertical cylinder

Henry

Roux

1988

J. Fluid Mech.

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This paper deals with the Soret separation of a binary mixture in a cylinder subjected to an axial temperature gradient. The study is connected to an experiment designed to measure the Soret coefficient of an AgI-KI mixture corresponding to a moderate Prandtl number (Pr = 0.6) and a high Schmidt number (Sc = 60). In such an experiment the species separation is often hidden by a mixing effect due to the buoyancy-driven convection generated by a horizontal temperature gradient induced by some defect of the heating system. Here, such a defect is simulated by a slight misorientation of the cell with respect to the vertical; a small inclination (γ = 1°) of the cell has been considered, but the results can be generalized for any other small γ. For situations corresponding to a top heating and a positive Soret parameter, S, two quite different regimes have been exhibited depending on the value of S. For moderate S, the induced solutal buoyancy balances the imposed thermal buoyancy, slowing down the flow and giving a good separation rate. For small S this balance does not exist (except in the centre), leading to a remixing of the species and thus to poor separation (the separation would be still worse for negative S). The smaller the (positive) Soret parameter is, the smaller the cell misorientation γ has to be to allow a good separation rate.

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Section: Introductionmentioning

confidence: 55%

Soret separation in a quasi-vertical cylinder

Henry

Roux

1988

J. Fluid Mech.

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“…However these so-called cross diffusion effects become important if not dominant, in materials processing operations e.g. dendritic growth [11,12], magnetic separation of colloids [13], MHD power generators [14] and aerospace combustion and flame dynamics [15,16] where they arise in binary gas and supercritical fuel injection systems. Generally when heat and mass transfer effects occur simultaneously in a moving fluid, the relationship between the fluxes and the driven potentials become significant.…”

Section: U Sir Is a DI Git Al C Oll E C Tio N Of T H E R E S E A R C mentioning

confidence: 99%

Rotating Unsteady Multi-Physico-Chemical Magneto-Micropolar Transport in Porous Media: Galerkin Finite Element Study

Bég

Shamshuddin

Reddy

et al. 2018

Comput Thermal Scien

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In this paper, a mathematical model is developed for magnetohydrodynamic (MHD), incompressible, dissipative and chemically reacting micropolar fluid flow, heat and mass transfer through a porous medium from a vertical plate with Hall current, Soret and Dufour effects. The entire system rotates with uniform angular velocity about an axis normal to the plate. Rosseland's diffusion approximation is used to describe the radiative heat flux in the energy equation. The governing partial differential equations for momentum, heat, angular momentum and species conservation are transformed into dimensionless form under the assumption of low Reynolds number with appropriate dimensionless quantities. The emerging boundary value problem is then solved numerically with a Galerkin finite element method employing the weighted residual approach. The evolution of translational velocity, micro-rotation (angular velocity), temperature and concentration are studied in detail. The influence of many multi-physical parameters in these variables is illustrated graphically. Finally, the friction factor, surface heat transfer and mass transfer rate dependency on the emerging thermo-physical parameters are also tabulated. The finite element code is benchmarked with the results reported in the literature to check the validity and accuracy under some limiting cases and an excellent agreement with published solutions is achieved. The study is relevant to rotating MHD energy generators utilizing non-Newtonian working fluids and also magnetic rheo-dynamic materials processing systems.

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“…The authors have used the Winter and Drickamer (1955) model, proposed for metal systems to estimate the thermodiffusion factor. Chien and Mattes (1983) used the TGZM method to produce thin semiconductor layers of GaAs and InP through liquid-phase epitaxial growth (LPE). In this method, a moving substrate is in contact with the melting zone where a thin layer of a semiconductor is continuously deposited on the substrate.…”

Section: Molten Semiconductor+metal Mixturesmentioning

confidence: 99%

Advances in Thermodiffusion and Thermophoresis (Soret Effect) in Liquid Mixtures

Eslamian¹

2012

Frontiers in Heat and Mass Transfer

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Recent advances in thermodiffusion (Soret effect) in binary and higher multicomponent liquid mixtures are reviewed. The mixtures studied include the hydrocarbon, associating, molten metal and semiconductor, polymer, and DNA mixtures. The emphasis is placed on the theoretical works, particularly models based on the nonequilibrium thermodynamics, although other approaches such as the statistical, kinetic and hydrodynamic approaches are discussed as well. For each mixture, the major theoretical and experimental works are discussed and the research trends and challenges are addressed. Some of the challenges include a need for combining various methods to develop a comprehensive theoretical model or at least to try to understand the differences and pros and cons of each approach. Thermodiffusion and ordinary diffusion coefficients are scarce in some mixtures such as binary DNA, molten metal and metal-semiconductor mixtures and all ternary mixtures. Understanding of the molecular structure of associating mixtures, and modeling of thermodiffusion in such mixtures are also very challenging.

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Thermal Soret diffusion in the liquid phase epitaxial growth of binary III–V compounds

Abstract: Growth and dissolution kinetics of ternary III-V compound heterostructures by liquid phase epitaxy

Cited by 7 publications

References 0 publications

Soret separation in a quasi-vertical cylinder

Soret separation in a quasi-vertical cylinder

Rotating Unsteady Multi-Physico-Chemical Magneto-Micropolar Transport in Porous Media: Galerkin Finite Element Study

Advances in Thermodiffusion and Thermophoresis (Soret Effect) in Liquid Mixtures

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