新型五温区碲化汞单晶炉热场结构数值模拟

Numerical Simulation of Thermal Field Structure of a New Type of Mercury Telluride Single Crystal Furnace with Five Temperature Zones

碲化汞(HgTe)晶体材料由于其优越的光电性能,在大面阵红外探测器领域有着广阔的应用前景。为了获得更适合HgTe单晶制备的温度梯度,本实验提出了一种新型五温区HgTe单晶炉热场结构,并通过对单晶炉内热场的数值模拟计算,得出了不同晶体生长阶段炉体内部的温度分布,获得了相应的温度梯度和热流密度分布,计算出梯度区内温度梯度约4.88℃/cm;同时搭建了五区加热试验平台,经过试验测得梯度区内温度梯度约为4.96℃/cm。

HgTe crystal materials have a wide application prospect in the field of large array infrared detector due to its excellent photoelectric properties. In order to obtain HgTe single crystal with excellent temperature gradient performance, a new improved structure of thermal field in mercury telluride single crystal furnace is proposed. Through numerical simulation of the heat field in the furnace, the temperature distribution and the corresponding temperature gradient and heat flux density distribution in the furnace at different growth stages of the crystal are obtained. The temperature gradient in the furnace is about 4.88 ℃/cm;a five-zone heating test platform is set up,and the temperature gradient in the gradient zone is about 4.96 ℃/cm.