CNTs/Ni/REO COMPOSITES USED TO ENHANCE THE WAVE-ABSORBING PROPERTY OF SANDWICH STRUCTURE

Abstract

Abstract: Study the wave-absorbing property of sandwich structures by dispersing the carbon nanotubes, lanthanum oxide in nanometer scale, Ni powder in micrometer scale and ytterbium oxide in micrometer scale into epoxy and filling the interlayer of glass fiber reinforced composites sandwich structures with the above epoxy mixture. The wave-absorbing property was characterized by using vector network analyzer. The results show that these composites structures have a good performance in wave-absorbing. The reflection ratio(dB) and the wave-absorbing bandwidth are both improved. From 2.99 to 18.00GHz, there are three wave-absorbing peaks. The bandwidth (<-5dB) of the first peak is 2.55GHz, the maximum dB is -23.78dB, and it is located at 4.86GHz. The bandwidth (<-5dB) of the second peak is 3.75GHz, the maximum dB is -21.07dB, and it is located at 10.35GHz. The bandwidth (<-5dB) of the third peak is 5.66GHz, the maximum dB is -13.65dB, and it is located at 14.04GHz. The total wave-absorbing bandwidth (<-5 dB) reach 11.96 GHz, and it accounts for 80% of all the tested frequency. Besides, the wave loss ratio of the composites structures is improved as well.

Key words: composites, sandwich structure, wave-absorbing property

CLC Number:

TB332

HE Ya-fei, HAO Li-feng, YANG Fan, JIAO Wei-cheng. CNTs/Ni/REO COMPOSITES USED TO ENHANCE THE WAVE-ABSORBING PROPERTY OF SANDWICH STRUCTURE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(1): 18-22.

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