支撑结构对碲锌镉固液界面形状的影响

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

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。

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.