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首页> 美国政府科技报告 >SURFACE COATINGS FOR LOW EMITTANCE IN THE THERMAL SURVEILLANCE BAND
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SURFACE COATINGS FOR LOW EMITTANCE IN THE THERMAL SURVEILLANCE BAND

机译：表面涂层用于热监控带中的低发射率

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Paint or semiconductor films may both be used to provide low emittance coatings for countersurveillance in the 8-14 microns wavelength range. Although the emittances of paint coatings are usually larger than those of semiconductor films, they are simpler to produce, more robust and are inexpensive. In the present report from Australia, a variety of paint samples were studied to determine their emittance, total hemispherical reflectance and angular reflectance distribution at 10.6 microns. The best results were achieved when various concentrations of 70 microns aluminium flake were incorporated into an inorganic phosphate binder, yielding emittances in the range 0.20 - 0.60 with diffuse reflectance distributions. The application of dust or water to these coatings resulted in large increases in emittance.

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