Numerical modelling of the czochralski growth of β-Ga2O3

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Date
2017
Volume
7
Issue
1
Journal
Crystals
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Basel : MDPI
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Abstract

Our numerical modelling of the Czochralski growth of single crystalline β-Ga2O3 crystals (monoclinic symmetry) starts at the 2D heat transport analysis within the crystal growth furnace, proceeds with the 3D heat transport and fluid flow analysis in the crystal-melt-crucible arrangement and targets the 3D thermal stress analysis within the β-Ga2O3 crystal. In order to perform the stress analysis, we measured the thermal expansion coefficients and the elastic stiffness coefficients in two samples of a β-Ga2O3 crystal grown at IKZ. Additionally, we analyse published data of β-Ga2O3 material properties and use data from literature for comparative calculations. The computations were performed by the software packages CrysMAS, CGsim, Ansys-cfx and comsol Multiphysics. By the hand of two different thermal expansion data sets and two different crystal orientations, we analyse the elastic stresses in terms of the von-Mises stress.

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Miller, W., Böttcher, K., Galazka, Z., & Schreuer, J. (2017). Numerical modelling of the czochralski growth of β-Ga2O3 (Basel : MDPI). Basel : MDPI. https://doi.org//10.3390/cryst7010026
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CC BY 4.0 Unported