Numerical Simulation of Hydrothermal Autoclave for Single Crystal Growth Process

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  • 水熱合成法によるバルク単結晶育成時のオートクレーブの熱解析
  • スイネツ ゴウセイホウ ニ ヨル バルク タンケッショウ イクセイジ ノ オートクレーブ ノ ネツ カイセキ

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Abstract

Numerical simulation about the hydrothermal process of two inches bulk single crystal growth has been done. The autoclave is assumed to be axisymmetric. In the present research, the authors discuss the natural convection heat transfer when the shape of baffles is flat or funnel-shaped. When the funnel-shaped baffle is used, the amount of flowing between a raw material zone and a crystal growth zone increases significantly. However, temperature difference between the two zones does not become very small. Therefore the funnel-shaped baffle is effective in hydrothermal crystal growth process from the viewpoint of transport phenomena. It is found that the best angle of the baffle is about 20 degrees in our calculation. Similar results are provided when the porous model in the raw material zone is employed.

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