Czochralski Technique

2021 ◽  
Author(s):  
Alan Symmons ◽  
Mark Lifshotz
1976 ◽  
Vol 34 (1) ◽  
pp. 1-10 ◽  
Author(s):  
R.C. DeMattei ◽  
R.A. Huggins ◽  
R.S. Feigelson

1985 ◽  
Vol 57 (6) ◽  
pp. 2203-2209 ◽  
Author(s):  
A. K. Chin ◽  
I. Camlibel ◽  
R. Caruso ◽  
M. S. S. Young ◽  
A. R. Von Neida

2019 ◽  
Vol 5 (3) ◽  
pp. 91-100
Author(s):  
Vladimir S. Berdnikov

This work is a brief overview of experimental study results for hydrodynamics and convective heat exchange in thermal gravity capillary convection modes for the classic Czochralski technique setup obtained at the Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences. The experiments have been carried out at test benches which simulated the physics of the Czochralski technique for 80 and 295 mm diameter crucibles. Melt simulating fluids with Prandtl numbers Pr = 0.05, 16, 45.6 and 2700 have been used. Experiments with transparent fluids have been used for comparing the evolution of flow structure from laminar mode to well-developed turbulent mode. Advanced visualization and measurement methods have been used. The regularities of local and integral convective heat exchange in the crucible/melt/crystal system have been studied. The experiments have shown that there are threshold Grashof and Marangoni numbers at which the structure of the thermal gravity capillary flow undergoes qualitative changes and hence the regularities of heat exchange in the melt change. The effect of melt hydrodynamics on the crystallization front shape has been studied for Pr = 45.6. Crystallization front shapes have been determined for the 1 × 105 to 1.9 × 105 range of Grashof numbers. We show that the crystallization front shape depends largely on the spatial flow pattern and the temperature distribution in the melt.


2021 ◽  
Vol 2057 (1) ◽  
pp. 012048
Author(s):  
N I Matskevich ◽  
V N Shlegel ◽  
A A Chernov ◽  
D A Samoshkin ◽  
S V Stankus ◽  
...  

Abstract The heat capacity of lithium tungstate single crystal (Li2WO4) was measured for the first time in the temperature range of 319-997 K. The experiments were carried out by DSC calorimetry. The Li2WO4 single crystal was first grown by low-temperature-gradient Czochralski technique with weight control. The temperature dependence of Li2WO4 heat capacity in the temperature range 319-997 K was monotonic. According to results of our studies, there were no phase transitions in Li2WO4 in the investigated temperature range.


1982 ◽  
Vol 41 (9) ◽  
pp. 841-843 ◽  
Author(s):  
Y. Kokubun ◽  
S. Washizuka ◽  
J. Ushizawa ◽  
M. Watanabe ◽  
T. Fukuda

1985 ◽  
Vol 71 (3) ◽  
pp. 648-654 ◽  
Author(s):  
B. Pichaud ◽  
N. Burle-Durbec ◽  
F. Minari ◽  
M. Duseaux

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