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Application of modified carbonyl iron particles in radar-infrared stealthy compatible coatings

CHEN Yanpeng,XU Guoyue,GUO Tengchao,HU Chen(College of Material Science & Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)  
The radar-infrared stealthy compatible coatings were prepared with the carbonyl iron particles(CIP) and polyurethane(PU) as fillers and matrix,respectively.The influence of morphology,milling time and content of CIP on microwave-absorbing properties and infrared emissivity was systematically investigated.These results indicate that the minimum reflectivity of microwave-absorbing with thickness of 2 mm reaches-9.3 dB at 18 GHz and infrared emissivity is 0.85 when the content of CIP without mechanical milling is 60%(mass fraction).After mechanical milling 16 hours,the morphology of CIP is flake.Infrared emissivity decreases to 0.69 when the content of CIP is 60%(mass fraction),and microwave-absorbing properties decrease slightly.CIP is expected to be infrared-radar stealthy compatible materials.
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