title: CoxFey@C Composites with Tunable Atomic Ratios for Excellent Electromagnetic Absorption Properties.
abstract: The shell on the nano-magnetic absorber can prevent oxidation, which is very important for its practical utilization. Generally, the nonmagnetic shell will decrease the integral magnetic loss and thus weaken the electromagnetic absorption. However, maintaining the original absorption properties of the magnetic core is a major challenge. Here, we designed novel and facile CoxFey@C composites by reducing CoxFe3-xO4@phenolic resin (x = 1, 0.5 and 0.25). High saturation magnetization value (Ms) of CoxFey particle, as a core, shows the interesting magnetic loss ability. Meanwhile, the carbon shell may increase the integral dielectric loss. The resulting composite shows excellent electromagnetic absorption properties. For example, at a coating thickness of 2 mm, the RLmin value can reach to -23 dB with an effective frequency range of 7 GHz (11-18 GHz). The mechanisms of the improved microwave absorption properties are discussed.
authors.affiliation: College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China.
authors.forename: Hualiang
authors.initials: H
authors.lastname: Lv
authors.affiliation: College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China.
authors.forename: Guangbin
authors.initials: G
authors.lastname: Ji
authors.affiliation: College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China.
authors.forename: Haiqian
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China.
authors.forename: Meng
authors.initials: M
authors.lastname: Li
authors.affiliation: College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China.
authors.forename: Zhongzheng
authors.initials: Z
authors.lastname: Zuo
authors.affiliation: College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China.
authors.forename: Baoshan
authors.initials: B
authors.lastname: Zhang
authors.affiliation: School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China.
authors.forename: Dongming
authors.initials: D
authors.lastname: Tang
authors.affiliation: Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China.
authors.forename: Youwei
authors.initials: Y
authors.lastname: Du