对碲镉汞这种重要的红外探测器材料的相图已进行了很多研究工作,其中大多是出于液相外延工艺的需要研究富碲的碲镉汞合金的相图。然而,到目前为止,很少见到冷却速率对凝固点影响的报道,而它对液相外延工艺有很大的参考价值。本文简要地介绍降温速率对富碲的碲镉汞合金凝固点的影响。降温速率范围从直接观察法的接近0℃/min到差热分析法的5℃/min。直接观察法的实验装置如图1所示,它是一台用电阻丝加热的镀金透明炉。炉管和镀金保温管均用透明石英管制成,并在镀金管上设有不镀金“窗口”,保证观察时的清晰度。所用控制器、热电偶和电位差计均经 Much research work has been done on the phase diagram of such an important infrared detector material of HgCdTe, most of which are the phase diagrams of the tellurium-rich tellurium-mercury-cadmium amalgams that are required for the liquid-phase epitaxy process. However, so far, few reports on the influence of cooling rate on the solidification point have been reported, which is of great value to the liquid phase epitaxy process. This article briefly describes the effect of cooling rate on the freezing point of tellurium-rich tellurium-cadmium amalgams. Cooling rates range from near 0 ° C / min for direct observations to 5 ° C / min for differential thermal analysis. Direct observation of the experimental device shown in Figure 1, it is a resistance wire heated gold-plated transparent furnace. Furnace tubes and gold-plated insulation tubes are made of transparent quartz tube, and gold-plated tube with a gold-plated “window” to ensure the clarity of observation. The controller, thermocouple and potentiometer are all used