Study on the Carbonyl Iron Powder Based Nano-Composite Radar Wave Absorbing Coatings
来源期刊:材料保护2004年增刊第2期
论文作者:LIANG wen-ting WANG Zhi-hui LI Wan-zhi HUANG Dong-zhen YAO Jun-min HU Chuan-xin LV Yan-hong
关键词:carbonyl iron powder; radar absorbing coating; nano composite;
摘 要:With the rapid development of stealth technique, carbonyl iron powder is regarded as an ideal radar absorbing material. In this paper, radar absorbing properties of carbonyl iron powder was investigated by using nano composite and macroscopic multi- layer composite approach. The machine- chemistry composite methods were employed during the experiment to produce nano composite absorbent. Two carbonyl iron powders named HP1, HP2 and nano powder named HP3 were employed. Absorbents were obtained by adding 10% HP3 powder with average size of 28 nm to the HP1 and HP2 carbonyl iron powders by weight respectively. By a series of composite techniques, sample plate with the radar absorbing coating was prepared. Compared with the single coating, the wave absorbing properties were significantly improved. The working band in which the wave reflectivity was less than 5 db was 4.8 ~ 18 GHz with the coating thickness of 1.0 mm. The lowest reflectivity was found to be 12.34 db at 8 GHz. The wave absorbing coating with thin thickness,broadband and strong absorbing properties was obtained.