Abstract: 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.

Key words: vibration, lithium tetraborate crystal, ideal fluid flow pattern