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利用直流电弧等离子体法在甲烷气氛中制备碳包覆磁性镍纳米胶囊(Carbon-coated Ni nanocapsules,Ni(C) NCs),将它作为电磁波吸收剂,按照质量比10%、20%、30%和40%与有机石蜡基体复合,在0.1~18 GHz范围内测定其复介电常数和复磁导率,并对其电磁波响应特性及吸收机制进行了研究.研究结果表明,Ni(C)纳米胶囊具有明显的极化损耗特征,其介电常数在低频范围内随频率提高而急剧衰减,而磁导率具有宽化的多重共振峰;随着Ni(C)纳米胶囊添加量的增加,其介电常数逐渐增加,其复磁导率实部和虚部分别在0.1~8 GHz、0.1~10 GHz出现增加,而在8~18 GHz和10~18 GHz范围内出现实部减小和虚部平缓变化的特征.根据极化、涡流以及反射损耗的理论分析,发现Ni(C)纳米胶囊以介电损耗为主,并对相关机制进行了探讨.

参考文献

[1] Liu, Y.;Liu, X.;Wang, X..Synthesis and microwave absorption properties of Ni-Zn-Mn spinel ferrites[J].Advances in Applied Ceramics,20152(2):82-86.
[2] Pinho MS.;Gregori ML.;Nunes RCR.;Soares BG..Performance of radar absorbing materials by waveguide measurements for X- and Ku-band frequencies[J].European Polymer Journal,200211(11):2321-2327.
[3] Chunhong Gong;Jingwei Zhang;Xuefeng Zhang.Strategy for Ultrafine Ni Fibers and Investigation of the Electromagnetic Characteristics[J].The journal of physical chemistry, C. Nanomaterials and interfaces,201022(22):10101-10107.
[4] MOHAMMAD MOUSAVINIA;ALI GHASEMI;EBRAHIM PAIMOZD.Structural, Magnetic, and Microwave Properties of SrFe_(12-x)Ni_(0.5)Co_(0.5)Sn)_(x/2)O_(19) Particles Synthesized by Sol-Gel Combustion Method[J].Journal of Electronic Materials,20139(9):2784-2792.
[5] X. F. Zhang;X. L. Dong;H. Huang;Y. Y. Liu;W. N. Wang;X. G. Zhu;B. Lv;J. P. Lei;C. G. Lee.Microwave absorption properties of the carbon-coated nickel nanocapsules[J].Applied physics letters,20065(5):053115-1-053115-3-0.
[6] Bayrakdar, H..Complex permittivity, complex permeability and microwave absorption properties of ferrite-paraffin polymer composites[J].Journal of Magnetism and Magnetic Materials,201114(14):1882-1885.
[7] Rescaled electrical properties of ZnO/low density polyethylene nanocomposites[J].Applied physics letters,200312(12):1956-1958.
[8] Dong XL;Zhang XF;Huang H;Zuo F.Enhanced microwave absorption in Ni/polyaniline nanocomposites by dual dielectric relaxations[J].Applied physics letters,20081(1):13127-1-13127-3-0.
[9] Mingzhong Wu;Y. D. Zhang;S. Hui;T. D. Xiao;Shihui Ge;W. A. Hines;J. I. Budnick;G. W. Taylor.Microwave magnetic properties of Co_(50)/(SiO_(2))_(50) nanoparticles[J].Applied physics letters,200223(23):4404-4406.
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