低频率振动下四硼酸锂的Bridgman生长

Low Frequence Vibrational Control of Li_2B_4O_7 Crystal Growth during Vertical Bridgman

研究了振动对四硼酸锂晶体生长的影响，从几个基本流体力学方程出发，对加振动后的方程进行了一定的分析，得到振动后的熔体运动模式与容器直径、流体高度、时间有关．然后通过模拟实验选择了合适的振动频率，熔体的高度和容器的直径．将其用于实际的Ｌｉ２Ｂ４Ｏ７晶体生长，并对在其它生长条件相同的情况下加振动的ＢＲ方法生长的ＬＢＯ晶体与不加振动的ＢＲ方法所生长的ＬＢＯ晶体进行了比较，得到在合适的振动下，晶体质量比在其它生长条件相同情况下不加振动生长的晶体质量更好．

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.