Effect of heat shield on the shape of the solid–liquid interface and temperature field in the BGO-eulithine LTG Cz growth

Optimization of crystal growth by changes of flow guide, radiation shield and sidewall insulation in Cz Si furnace

“…Using computer simulation instead, one can reproduce crystal growth process and forecast the physical phenomena quickly and economically, including thermal field, melt turbulence, gas convection, thermal stresses, etc., at varying operation and geometry conditions [2][3][4][5][6][7].…”

“…Lukanin and Kalaev [3] computed several melt/crystal interface geometries, and compared with the experimental data for 100 and 300 mm diameter CZ crystals. Vasiliev and Budenkova [4] analyzed the effect of heat shield on the shape of solid-liquid interface and temperature field. Huang et al [5] improved the radiation shield (molybdenum and graphite with different coatings) and the side and bottom insulations, without sacrificing the crystal quality; significant reductions of power and argon consumption were achieved, and the pulling rate was increased.…”

Shaped Crystal Growth

“…In the scintillating crystal market, BGO represents 70% of the crystals produced. BGO crystals, as potential scintillating material and high -quality bulk crystals, can be grown by the industrial Czochralki technique [Borovlev 2001, Vasiliev 2005 . BGO crystal was chosen as a candidate for µ -PD because it combines both congruent melting [Kaplun 1996] and a relatively high rate of evaporation of one of the constituents, namely Bi 2 O 3 [Shim 2002] .…”

Effect of internal radiation on the solid–liquid interface shape in low and high thermal gradient Czochralski oxide growth

“…Nevertheless, in reality, the effect is not disappeared entirely because the application of the LTG process to the growth of crystals with high absorption coefficient in the infrared spectrum is not appropriate, since it leads to deterioration of stability of the growth process. Specular reflection has a negative impact on the growth process, because it assists the formation of the interface consisting of rounded and faceted parts [8], but to strive with this effect is very difficult [15]. Luckily, the influence of specular reflection at the cone of crystal diminishes with its length because the distance between the shoulder and the interface increases.…”