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硫化锌(ZnS)是一种重要的红外光学材料,在8~10μm波段范围内拥有较高的透过率,广泛应用于导弹整流罩、红外天文卫星、红外光谱仪、测量仪和热像仪等领域。采用高温后处理工艺方法可促进晶粒生长,并起到消除热压多晶ZnS内部的残余六方相和气孔的作用,进而可提升材料光学透过性能。对于厚度5 mm的热压ZnS试验片,1.064μm处透过率达到60%,2~10μm平均透过率达到73%。经后处理的光学窗口其抗冲击性能测试结果表明,材料保留了原有热压ZnS材料的力学特性,且在400℃的条件下能够满足光电探测系统清晰成像的要求。
Zinc sulfide (ZnS) is an important infrared optical material with high transmittance in the wavelength range of 8 ~ 10μm. It is widely used in missile radomes, infrared astronomy satellites, infrared spectrometers, measuring instruments and thermal imagers field. The high temperature post-treatment process can promote the grain growth, and play the role of eliminating the residual hexagonal phase and pores inside the hot-pressed polycrystalline ZnS, which can enhance the optical transmission properties of the material. For the hot-pressed ZnS test piece with a thickness of 5 mm, the transmittance at 60 ° C was 60% and the average transmittance at 2 ~ 10 μm was 73%. The post-processed optical window impact resistance test results show that the material retains the mechanical properties of the original hot pressing ZnS material, and can meet the requirements of clear imaging of the photodetection system under the condition of 400 ° C.