Hot zone design optimization for YAG single crystal growth

Abstract

The YAG crystal growth industry will follow the same path as the semiconductor industry with cost becoming the main driver. Thus, it become imperative that models be developed that can be used for scaling purposes for the design of large YAG crystal growth systems. Analysis of thermal phenomena in the crystal growing by induction heating hot zone and resistance heating carbon hot zone has been addressed. To grow a good quality, productivity improvement, and large size of YAG crystal growing is shortfalls of current induction heating Czochralski method. The simulation includes the temperature gradient in melt and melt-crystal interface, growing zone. Resistance heating has stable temperature gradient in melt and higher gradient in melt-crystal interface which can be controlled by hot zone design change. Power consumption also improved by using lower thermal conductivity carbon insulation materials.