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,2019,48(12):3997~4003.[刘渊,SHIJINGFENG,JIAYING,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.]
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
投稿时间:2019-06-17  修订日期:2019-08-04
中文关键词:  铁氧体  羰基铁  原位生长  电磁性能
基金项目:国家自然科学基金资助(项目号21875281)
中文摘要:
      采用MOCVD工艺在微米级Ni0.4Zn0.2Mn0.4Ce0.06Fe1.94O4(NZMCF)表面原位生长了纳米级羰基铁(CI)壳层,通过控制沉积温度,调控核壳形貌和吸波性能,得到了具有核壳结构的NZMCF -CI复合吸波剂,利用XRD、SEM、EDS及VNA等分析手段,重点研究了沉积温度对NZMCF -CI核壳粉体微观形貌、晶体结构、电磁参数及吸波性能的影响。结果表明:通过调节沉积温度,可以有效调控核壳粉体的形貌,进而调控吸波性能。沉积温度为220 ℃,NZMCF-CI核壳粉体具有最佳的形貌及吸波性能。利用测得的同轴环样品的电磁参数,计算出NZMCF -CI涂层在厚度为1.8 mm时,反射率最小值为-39.9 dB,小于-10 dB的吸波带宽为14.2 GHz(3.8~18 GHz)。涂层厚度为0.8~2.6mm时,在3.2~ 18 GHz均能实现最小反射率低于-20 dB,在2.5~18 GHz均能实现最小反射率低于-10 dB。仅需要调整厚度,即可以实现2~18 GHz内良好的吸波效果。
Fabrication and microwave absorbing properties of Nano-carbonyl iron in situ grown on Ni0.4Zn0.2Mn0.4Ce0.06Fe1.94O4 surface
英文关键词:ferrite, in  situ, carbonyl  iron, electromagnetic  wave absorption
英文摘要:
      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.
作者单位E-mail
刘渊 火箭军工程大学 liuyuanbixue@163.com 
师金锋 火箭军工程大学  
贾瑛 火箭军工程大学  
李茸 火箭军工程大学  
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