Real-time prediction of crystal/melt interface shape during Czochralski crystal growth

J Ding, L Liu - CrystEngComm, 2018 - pubs.rsc.org
The shape of the crystal/melt interface during Czochralski crystal growth strongly influences
the crystal quality. In this paper, a novel method for real-time detection of the varied interface …

3D simulation of the coil geometry effect on the induction heating process in Czochralski crystal growth system

H Heidari, MH Tavakoli, AJ Shokri… - Crystal Research …, 2020 - Wiley Online Library
Herein, influence of coil geometry in a Czochralski crystal growth system is studied using 3D
finite element method. Three different geometries for the helical RF‐coil including solenoid …

Effect of the pulling, crystal and crucible rotation rate on the thermal stress and the melt–crystal interface in the Czochralski growth of germanium crystals

M Saadatirad, MH Tavakoli, H Khodamoradi… - …, 2021 - pubs.rsc.org
A set of two-dimensional numerical simulations of the Czochralski growth of germanium
crystals were performed in order to study the effect of the crystal pulling rate and …

[HTML][HTML] Quasi-transient calculation of Czochralski growth of Ge crystals using the software elmer

W Miller, N Abrosimov, J Fischer, A Gybin, U Juda… - Crystals, 2019 - mdpi.com
A numerical scheme was developed to compute the thermal and stress fields of the
Czochralski process in a quasi-time dependent mode. The growth velocity was computed …

Computational analysis of heat transfer, thermal stress and dislocation density during resistively Czochralski growth of germanium single crystal

MH Tavakoli, EK Renani, M Honarmandnia… - Journal of Crystal …, 2018 - Elsevier
In this paper, a set of numerical simulations of fluid flow, temperature gradient, thermal stress
and dislocation density for a Czochralski setup used to grow IR optical-grade Ge single …

In situ visualization of the quasi-periodic crystal growth interface fluctuation by growth interface electromotive force spectrum in a Czochralski system

Y Zhu, S Lin, Z Liu, W Wang, D Ma, B Wang - CrystEngComm, 2019 - pubs.rsc.org
Inhomogeneity and striations stemming from growth interface fluctuation impair the
performance of bulk single crystals. Although an enormous number of theoretical and …

Influence of magnetic flux concentrator on the induction heating process in crystal growth systems-geometry investigation

H Heidari, MH Tavakoli, SO Sobhani… - …, 2018 - pubs.rsc.org
In this paper, a magnetic flux concentrator (MFC) is reported, and its geometry effect on the
induction heating process has been calculated in a Czochralski crystal growth system using …

Control of melt flow and oxygen distribution using traveling magnetic field during directional solidification of silicon ingots

Y Shao, Z Li, Q Yu, L Liu - Silicon, 2020 - Springer
Traveling magnetic field (TMF) is a potential method to control the melt flow and impurity
transport during the directional solidification (DS) of silicon ingots. We numerically study the …

Global simulation of an RF Czochralski furnace during different stages of germanium single crystal growth, part II: to investigate the effect of the crucible's relative …

M Honarmandnia, MH Tavakoli, H Sadeghi - CrystEngComm, 2017 - pubs.rsc.org
By changing the vertical relative position of the crucible against the induction coil, the flow
and thermal fields in the melt are seriously affected. The distribution of heat generation …

Electromagnetic Safety and Minimum Wall Thickness of a Steel Chamber for Inductive Czochralski Crystal Growth Furnace

S Hadidchi, MH Tavakoli - JOM, 2023 - Springer
In this article, a set of two-dimensional computer simulations were performed to investigate
the required minimum thickness of a steel chamber wall used for an inductive Czochralski …