支撑结构对碲锌镉固液界面形状的影响

在晶体生长过程中,固液界面形状与界面附近热流的状态有关。影响固液界面附近热流方向的因素有外部温场分布和材料热导率等。总结了常用的固液界面控制方式,然后采用CGSim温场模拟软件对3种使用不同支撑结构的晶体的生长过程进行了模拟,并对籽晶区以及锥形区内部固液界面的形状进行了对比。结果显示,支撑结构对籽晶区及锥形区内部固液界面的控制影响较大;通过采用合适的支撑结构设计并选取合适材料,同时配合外部温场的调节,能够得到理想的凸形固液界面。

Influence of Support Structure on the Solid-liquid Interface Shape of Cadmium Zinc Telluride

During crystal growth, the solid-liquid interface shape is related to the state of heat flow nearby. The factors that affect the direction of heat flow in the solid-liquid interface include external temperature field distribution and material thermal conductivity. The commonly used solid-liquid interface control methods are summarized, and the CGSim temperature field simulation software is used to simulate three crystal growth processes using different support structures. At the same time, the solid-liquid interface shapes inside the seed area and the cone area are compared. The results show that the support structure has a greater influence on the control of the solid-liquid interfaces inside the seed area and the cone area. Using a suitable support structure design and appropriate selection of materials, with the adjustment of the external temperature field, the ideal convex solid-liquid interface shape can be obtained.