红外探测器用陶瓷/可伐合金钎焊技术研究

当前制冷型红外探测器所使用的金属材料、陶瓷材料的工作温度为80 K左右,其钎焊焊缝要求与常规钎焊焊缝存在很大的差异。本文对当前陶瓷/金属材料的钎焊方法进行了整理,使用AgCuTi钎料进行了钎焊工艺实验,实现了可伐合金/陶瓷(蓝宝石)材料直接钎焊(无金属化)。实验后进行了焊缝气孔率检测、抗温度冲击实验(333～77 K)。实验结果显示该种焊接方法满足制冷型焦平面探测器对可伐合金/陶瓷(蓝宝石)材料钎焊的要求,该工艺方法制备的焊接件可在超低温环境中长期服役。

Research on packaging process of ceramic to Kovar metal in infrared detectors

Currently,the working temperature of metal and ceramic materials used in infrared detectors is about 80K,so compared to common metal/ceramic soldering line,the soldering line in infrared detectors is different.In this paper,the current ceramic/metal brazing methods are reviewed,the experiment of the soldering process was carried out with a kind of solder based on AgCuTi metal.Direct soldering(non - metallization)of ceramic(sapphire)to kovar was realized.After the experiment,the inspection of weld porosity and temperature shock resistance test(333~77K)were carried out.The result showed that this kind of soldering method can meets the demand of soldering of ceramic(sapphire)to kovar of the infrared detectors.The soldering parts prepared by this method can be used in ultra-low temperature environment for a long time.