Effects of RF coil position on the transport processes during the stages of sapphire Czochralski crystal growth

Numerical simulation of heat and fluid flows for sapphire single crystal growth by the Kyropoulos method

“…It is obvious that during the growth process, flow motion inside the melt is laminar, and the effect of buoyancy convection is dominant. Following Lu and Chen [1,3,8], Chen and Lu [2] and Lu et al [7], convexity is defined by the height difference of the crystal-melt interface in the vertical direction. Fig.…”

“…In order to produce a perfect single crystal, it is important to obtain precise information about the heat transfer and flow motion inside the KY furnace during the growth process. The heat and fluid transport phenomena of Czochralski (CZ) and heat-exchanger methods have been studied numerically by several investigators [1][2][3][4][5][6][7][8]. However, the numerical simulation of KY sapphire single crystal has been investigated by only a few researchers.…”

Effect of power arrangement on the crystal shape during the Kyropoulos sapphire crystal growth process

“…Information related to heat transfer and fluid motion during the crystal growth process inside the furnace is very important for the production of high quality sapphire single crystals. Numerical simulations [1][2][3][4][5][6][7][8][9][10][11] are thus frequently used to predict these transport phenomena.…”

The effect of crucible bottom deformation on the quality of Nd:GGG crystals grown by Czochralski method

“…A well-designed thermal field could create appropriate temperature gradient in the melt and bulk crystal, and affect on the quality of growth. Wei-Lu et al [10] have investigated Influence of position and geometry of RF coil on the transport process and induction heating during the growth. Their results show that if the central position of coil is below the central position of melt during the growth process, the least input power is required and temperature gradient along the crystalline would be small.…”