Influence of crucible geometry and position on the induction heating process in crystal growth systems

Tavakoli, Mohammad Hossein; Mohammadi-Manesh, Ebrahim; Ojaghi, Abdollah

doi:10.1016/j.jcrysgro.2009.07.013

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…The mathematical model used for our numerical calculation has been described in detail elsewhere [15,17,18]. It can be summarized as follows.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Geometry and orientation of the metallic parts [14,15], cross section of the coil turns [16], and the crucible shape and position [17] are the most important of them. Another crucial parameter related directly to the temperature and flow field produced in the growth setup is the applied frequency of the driving current in the inductor (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical study of induction heating in melt growth systems—Frequency selection

Tavakoli

Karbaschi

Samavat

et al. 2010

Journal of Crystal Growth

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“…The mathematical model used for our numerical calculation has been described in detail elsewhere [15,17,18]. It can be summarized as follows.…”

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical study of induction heating in melt growth systems—Frequency selection

Tavakoli

Karbaschi

Samavat

et al. 2010

Journal of Crystal Growth

Self Cite

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“…Tavakoli et al [12] numerically studied the crucible geometry and the effects of its position respect to the RF coil on the heat generation in the growth process. They presented that a correct choice of shape and position for the crucible leads to the optimization of heat generation and thus the improvement of the coil efficiency.…”

Section: Introductionmentioning

confidence: 99%

The effect of crucible bottom deformation on the quality of Nd:GGG crystals grown by Czochralski method

Saeedi

Asadian

Enayati

et al. 2011

Cryst. Res. Technol.

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In this paper, we report the growth of neodymium doped Gadolinium Gallium Garnet (Nd:GGG) crystal using Czochralski (CZ) method, and study the effects of crucible bottom deformation and thermal insulator thickness on the growth process and crystal quality. Garnet structure and <111> crystallography orientation of the crystal were confirmed by the X-Ray diffraction (XRD) analysis. Macroscopic defects, residual stresses, quality, and homogeneity of the crystals were investigated by means of parallel plane polariscope and laser fizeau interferometer respectively and the results compared together. Experimental observations show that the crucible bottom deformation from flat to convex, and decreasing the thickness of zirconia insulator under the crucible result in the formation of lateral cores and increasing the crystal inhomogeneity and tensions, leading to the decrease of the crystal quality.

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“…The melt convection or argon gas flow is simultaneously solved by global heat transfer analysis. The flow in Czochralski crystal growth configurations has been investigated by many scientists [9][10][11][12][13][14]. It has been found that counter-rotation of the crystal and crucible leads to a complex flow, which is characterized by three major recirculation zones, if crucible rotation dominates the flow.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional numerical simulation of thermocapillary convection in detached solidification

Peng

Fan

et al. 2011

Sci. China Technol. Sci.

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Numerical simulations of flow in the melt (CdZnTe) with different conditions are conducted using the finite-difference method. When the top surface of the melt is solid wall under microgravity condition, the thermocapillary convection is caused in the melt by the surface tension gradient on the free surface. As the Marangoni number is small, the flow is steady thermocapillary convection. As the Marangoni number exceeds the critical value, the steady flow transits into unstable thermocapillary convection. When the top surface of the melt is free surface under microgravity, two roll cells are observed in the melt, which are driven by both the surface tension gradients on the upper and lower free surfaces. When the top surface of the melt is free surface under gravity condition, the effect of the buoyancy on the flow is little as the Marangoni number is small. With the Marangoni number increasing, the effect of the buoyancy increases, which makes the upper roll cell weaken and the lower roll cell strengthen. detached solidification, thermocapillary convection, buoyancy, CdZnTe, numerical simulation Citation: Peng L, Fan J Y, Li Y R, et al. Two-dimensional numerical simulation of thermocapillary convection in detached solidification. Sci China Tech Sci, 2012, 55: 527536,

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Influence of crucible geometry and position on the induction heating process in crystal growth systems

Cited by 14 publications

References 12 publications

Numerical study of induction heating in melt growth systems—Frequency selection

Numerical study of induction heating in melt growth systems—Frequency selection

The effect of crucible bottom deformation on the quality of Nd:GGG crystals grown by Czochralski method

Two-dimensional numerical simulation of thermocapillary convection in detached solidification

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