Study on IR Extinction Characteristic of Nano-Ag Powder

After 30g nano-Ag powder was sprayed into 20 m3 smoke screen chamber,its transmission rate of laser and mass concentration were measured in different time.Consequently,the mass extinction coefficients of nano-Ag powder to 1.06 μm near IR and 10.6 μm far IR laser were calculated,which were 1.833 m2.g-1 and 1.474 m2.g-1.Besides,The screening effect of nano-Ag powder smoke screen to IR thermal imaging of target was tested by IR thermal imaging set in 8～12 μm.The experimental results showed that nano-Ag powder has excellent interference capability to 1.06 μm and 10.6 μm IR laser and IR thermal imaging set,and has a great potential as a smoke interference material in broad band.