用高能球磨法制备了掺杂SiO_2的FeCo纳米晶磁粉,用SEM,XRD等分析手段对纳米晶磁粉进行结构分析,研究了掺杂SiO_2对FeCo纳米晶磁粉/石蜡复合物复介电常数和复磁导率的影响.结果表明,杂质SiO_2主要以非晶态的形式存在于FeCo纳米晶颗粒中;与未掺杂SiO_2的FeCo纳米晶磁粉相比,在复磁导率变化很小的情况下,掺杂适量的SiO_2可显著降低纳米晶磁粉/石蜡复合物的复介电常数,可较好的解决吸波涂层设计中的阻抗匹配问题.
The FeCo/SiO_2 nanocrystalline magnetic powders were prepared from the mixtures of carboxyl iron, cobalt and SiO_2 powders by the simple ball-milling method. The microstructure was characterized by XRD and SEM. Doping effect on electromagnetic parameters was investigated by vector network analyzer for FeCo nanocrystalline magnetic powders doped with SiO_2. The results show that impurity of SO_2 in the FeCo nanocrystalline exists in the form of amorphous phase and the doping can greatly modify the microwave electromagnetic properties of the magnetic powders. As compared to the pure FeCo nanocrystalline powders, doping of SiO_2 significantly decreases the real and imaginary parts of complex permittivity of magnetic powders, but corresponding complex permeability changes slightly.Consequently, it is obvious that this is an availability way to improve the impedance matching of absorbers.
参考文献
| [1] | Ph.Toneguzzo,G.Viau,O.Acher,F.Guillet,E.Bruneton,F.Fievet-Vincent,F.Fievet,CoNi and FeCoNi fine parti-cles prepared by polyol process:Physico-chemical char-acterization and dynamic magnetic properties,Journal of Materials Science,35,3767(2000) |
| [2] | P.H.Zhou,L.J.Deng,J.L.Xie,D.F.Liang,L.Chen,X.Q.Zhao,Nanocrystalline structure and particle size on microwave permeability of FeNi powders prepared by me-chanical alloying,Journal of Magnetism and Magnetic Ma-terials,292,325(2005) |
| [3] | Shigeyoshi Yoshida,Shinsuke Ando,Yutaka Shimada,Kei Suzuki,Kiyoshi Nomura,Kazuaki Fukamichi,Crys-tal structure and microwave permeability of very thin Fe-Si-Al flakes produced by microforging,Journal of Applied Physics,93(10),6659(2003) |
| [4] | XIE Jianliang,LIANG Bolang,DENG Longjiang,Elec-tromagnetic parameters analysis of SiO_2 coat flaky metal magnetic powder,Journal of functional Materials,39(1),41(2008)(谢建良,梁波浪,邓龙江,二氧化硅包覆片状金属磁性微粉电磁特性分析,功能材料,39(1),41(2008)) |
| [5] | XIAO Jun,PAN Jing,LIU Xincai,High energy ball milling its application in the preparation of nanostruc-ture magnetic materials,Journal of Magnetic Materials and Devices,36(2),17(2005)(肖军,潘晶,刘新才,高能球磨法及其在纳米晶磁性材料制备中的应用,磁性材料及器件,86(2),17(2005)) |
| [6] | WANG Wei,GUAN Jianguo,WANG Qi,Influence of ball milling time on the microstructure and properties of pre-pared Fe-ZnO core-shell nanocomposite particles,Journal of Inorganic Materials,20(3),599(2005)(王维,官建国,王琦,球磨时间对制备Fe-ZnO核壳纳米复合粒子的结构和性能的影响,无机材料学报,20(3),599(2005)) |
| [7] | Jiu Rong Liu,Masahiro Itoh,Takashi Horikawa,Masaru Itakura,Noriyuki Kuwano,Ken-ichi Machida,Complex permittivity,permeability and electromagnetic wave ab-sorption of á-Fe/C(amorphous) and Fe2B/C(amorphous) nanocomposites,Journal of Physic D:Applied Physic,37,2737(2004) |
| [8] | Mingzhong Wu,Y.D.Zhang,S.Hui,T.D.Xiao,Shihui Ge,W.A.hines,J.L.Budnick,G.W.Taylor,Microwave proper-ties of Co_(50)/(SiO_2)_(50) nanoparticles,Applied Physics Let-ters,80(23),4404(2002) |
| [9] | SHEN Yifu,Introduction to Solid State Physics,(Beijing,Chemical Industry Press,2005) p.283(沈以赴,固体物理基础教程(北京,化学工业出版社,2005)p.283) |
| [10] | 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,Ap-pled Physics Letters,89,053115(2006) |
| [11] | Shigeyoshi Yoshida,Mitsuharu Sato,Eishu Sugawara,Yutaka Shimada,Permeability and electromagnetic-interference characteristics of Fe-Si-Al alloy flakes-polymer composite,Journal of Applied Physics,85(8),4636(1999) |
| [12] | Liang Qiao,Fusheng Wen,Jiangqiang Wei,Jiaobo Wang,Fashen Li,Microwave permeability spectra of flake-shaped FeCuNbSiB particle composites,Journal of Ap-plied Physics,103,063903(2008) |
| [13] | L.Z.Wu,J.Ding,H.B.Jiang,L.F.Chen,C.K.Ong,Particle size influence to the microwave properties of iron based magnetic particulate composites,Journal of Magnetism and Magnetic Materials,285,233(2005) |
| [14] | SungSoo Kim,SunTae Kim,YeoChoon Yoon,Kyung-Sub Lee.,Magnetic,dielectric,and microwave absorb-ing properties of iron particles dispersed in rubber matrix in gigahertz frequencies,Journal of Applied Physics,97,10F905(2005) |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%