Numerical simulation of the crystal growth of Ti:Al2O3 material by the µ-PD Technology
Journal Title: Journal of New technology and Materials - Year 2016, Vol 6, Issue 2
Abstract
In this work we have studied the growth of titanium doped sapphire using the micro-pulling down (µ-PD) technique; we established a numerical, two-dimensional finite volume model in cylindrical coordinates with an axisymmetric configuration. The flow, the heat and the mass transfer are modeled by the differential equations of conservation of mass, momentum, energy and species. This problem, which takes into account the convection-diffusion coupling, is discretized using the Finite Volumes Method (FVM). Simulations results show that the longitudinal distribution of titanium remains homogeneous along the axis of the sapphire material; the radial mass transfer of titanium increase in the crystal drawn when the pulling rate increases, The melt/crystal interface for the µ-PD technique has a flat shape; this important result from this shape agrees with the experiment observation. Our model for the µ-PD method is in good agreement with experimental results.
Authors and Affiliations
Hanane Azoui, Abdellah Laidoune, Djamel Haddad, Derradji Bahloul, Farida Merrouchi
Keywords
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- EP ID EP268349
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