title: 1D magnetic materials of Fe₃O₄ and Fe with high performance of microwave absorption fabricated by electrospinning method.
abstract: Fe3O4 and Fe nanowires are successfully fabricated by electrospinning method and reduction process. Wiry microstructures were achieved with the phase transformation from α-Fe2O3 to Fe3O4 and Fe by partial and full reduction, while still preserving the wire morphology. The diameters of the Fe3O4 and Fe nanowires are approximately 50-60 nm and 30-40 nm, respectively. The investigation of microwave absorption reveals that the Fe3O4 nanowires exhibit excellent microwave absorbing properties. For paraffin-based composite containing 50% weight concentration of Fe3O4 nanowires, the minimum reflection loss reaches -17.2 dB at 6.2 GHz with the matching thickness of 5.5 mm. Furthermore, the calculation shows that the modulus of the ratio between the complex permittivity and permeability |ε/μ| is far away from unity at the minimum reflection loss point, which is quite different from the traditional opinions.
authors.affiliation: Functional Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, P.R.China and Beijing Key Laboratory of Precision Alloys, Beijing 100081, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Han
authors.affiliation: Functional Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, P.R.China and Beijing Key Laboratory of Precision Alloys, Beijing 100081, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.affiliation: Institute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, P. R. China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Pan
authors.affiliation: Functional Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, P.R.China and Beijing Key Laboratory of Precision Alloys, Beijing 100081, China.
authors.forename: Minggang
authors.initials: M
authors.lastname: Zhu
authors.affiliation: Functional Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, P.R.China and Beijing Key Laboratory of Precision Alloys, Beijing 100081, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Zhou
authors.affiliation: Institute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, P. R. China.
authors.forename: Fa-shen
authors.initials: FS
authors.lastname: Li