Low Frequence Vibrational Control of Li_2B_4O_7 Crystal Growth during Vertical Bridgman

The influence of vibration on Bridgman growth of Li2B4O7 crystal was studied in this paper. The fluid flow equations considering vibration effect were analyzed, and the result bolained shows that the fluid flow pattern induced by the vibrational motion is related to the radius of the crucible, the height of liquid and time of vibration. Appropriate vibration frequence, radius of the crucible and height of the liquid were chosen through simulation. They were also applied in the practical Li2B4O7 single crystal growth. The quality of the crystal grown under appropriate vibration is better than that without vibration.