石墨烯烟幕红外激光消光性能研究

Extinction Characteristic of graphene Smoke to Infrared and Laser Wave

石墨烯片具有质轻、层薄、比表面大的优点,满足烟幕材料所需的要求。为了探索石墨烯在干扰红外成像制导武器方面的应用,利用20 m3烟箱,通过快速热引爆石墨烯原材料获得烟幕的方法,测试了烟幕在1.06μm激光的透过率曲线以及8～14μm波段的红外图像的遮蔽特性,获得了烟幕对1.06μm激光和8～14μm红外波段的平均质量消光系数均在2.0 m2?g-1以上,对红外光具有显著的干扰效果。分析了烟幕粒子的扫描电子显微图像、透射电镜图和X射线衍射图谱,结果表明所制备的烟幕粒子为石墨烯片组成,石墨烯烟幕粒子的微观结构有利于对红外光的吸收和散射。

Graphene sheets have some charming advantages for military pyrotechnical technology, such as light weight, shot depth and large surface area, et al. To explore the applications of graphene on interference the imaging IR guidance weapons, graphene smoke were produced in a middle-size smoke chamber via thermal shock of graphene raw materials. The relation curves between transmittance of 1.06 μm laser and time and the extinction performance for IR images of graphene smoke in the wave length range of 8 - 14μm were tested and, with method of weighing dialyser, the mass concentrations were measured in different moments. According to the experimental results, the average mass extinction coefficients of the smoke to 1.06μm laser and to the wave length range of 8 - 14μm are more than 2.0m^2.g^-1. SEM, TEM and XRD results reveal that grains of as-produced aerosol are clustering of graphene sheets, which is in favor of scattering and absorption of infrared wave.