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《Journal of Functional Materials》 2003-06
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Study on shielding functionally gradient materials with low reflection loss and high absorption loss for electromagnetic wave

GUAN Deng-gao, HANG Wan-xia, MAO Jian, JIANG Yu,CHEN Jia-zhao, TU Ming-jing(Department of Metal Materials, College of Material Science & Engineering, Sichuan University, Chengdu 610065, China)  
In order to reduce the pollution, which the electromagnetic wave being reflected back into air will pollute again the electromagnetic environment, in this paper, the double gradient model for shielding functionally gradient materials (SFGM) was put forward to realize low reflection loss and high absorption loss for electromagnetic wave. The gradient composite shielding coatings based on nickle and NiZnFe_2O_4 were prepared. The results showed the reflection loss of the gradient coatings was decreased by 6~8dB and the absorption loss of the gradient coatings was increased by 6~14dB than that of the non-gradient coatings in less than 1GHz. When the attenuation constant of the absorption layer in center did not change, the absorption loss increased with the thickness of the absorption layer.
【Fund】: 四川省重点科技攻关资助项目(03GG009 002 3)
【CateGory Index】: TM27
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