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刘渊,师金锋,贾瑛,李茸.Ni0.4Zn0.2Mn0.4Ce0.06Fe1.94O4表面原位构筑纳米羰基铁的可控制备及吸波性能研究[J].稀有金属材料与工程(英文),2019,48(12):3997~4003.[刘渊,SHIJINGFENG,JIAYING and LIRONG.Fabrication and microwave absorbing properties of Nano-carbonyl iron in situ grown on Ni0.4Zn0.2Mn0.4Ce0.06Fe1.94O4 surface[J].Rare Metal Materials and Engineering,2019,48(12):3997~4003.]
Fabrication and microwave absorbing properties of Nano-carbonyl iron in situ grown on Ni0.4Zn0.2Mn0.4Ce0.06Fe1.94O4 surface
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Received:June 17, 2019  Revised:August 04, 2019
Key words: ferrite, in  situ, carbonyl  iron, electromagnetic  wave absorption
Foundation item:国家自然科学基金资助(项目号21875281)
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      Ferrite and carbonyl iron power are the major absorbing components of conventional radar absorbing materials (RAM). However, conventional RAM made of the aforementioned single-absorbing components cannot meet the comprehensive requirements of “thin, wide, light, and strong.” By analyzing the complementary relationship among ferrite and carbonyl iron power, a carbonyl iron coated core-shell nano composite absorbent system is established. In addition, by changing the deposition temperature to adjust the morphologies and absorbing properties of powders, excellent performance of the new core-shell structure absorbent is obtained. The nano carbonyl iron (CI) shell in situ grown on Ni0.4Zn0.2Mn0.4Ce0.06Fe1.94O4 (NZMCF) surface by metal organic chemical vapor deposition (MOCVD) for using as electromagnetic wave (EMW) absorbing materials. X-ray diffraction, scanning electron microscope and energy dispersive spectrometer analyses show that NZMCF-CI composites successfully prepared with a core-shell structure. Optimizing the weight ratio of CI would likely cause the composites to attain the EM parameters necessary in EMW absorbing materials, a minimum reflection loss (RL) was -39.9 dB to the corresponding thickness was 1.8mm, and the RL exceeds -10 dB from 3.8 to 18.0 GHz. The RL exceeds -20 dB from 3.2 to 18 GHz and -10 dB from 2.5 to 18 GHz for the absorber thickness from 0.8 to 2.6 mm, which covers almost the whole 2 to 18.0 GHz.