Synthesis, dielectric and microwave absorption properties of flake carbonyl iron particles coated with polymer nano-beads
flake carbonyl iron particles (FCIPs) coated with nano-structure polymer (meth-acrylic acid-polystyrene, MAA-PS) were synthesized by dispersion polymerization using poly (vinylpyrrolidone) as stabilizer and 2, 2-azobis (isobutyronirile) as a catalytic agent.Field emission scanning electron microscope (FESEM) equipped with energy dispersive x-ray spectroscopy and high-resolution transmission electron microscope (HRTEM) were used to observe its morphology of FCIPs-MAA-PS, and thermo-gravimetric analyses (TG) were employed to characterize its mass loss of polymer surface modification.Electromagnetic properties of FCIPs before and after coating were investigated by ET network analyzer within 0.5-18GHz.After coated with nano-structure polymer, the real part of permittivity for FCIPs/wax composite was decreased while its permeability remained nearly unchanged.Dielectric behaviors were discussed by the Cole-Cole dispersion formula.After surface modification with nano-structure polymer, reflection loss (RL) of FCIPs-MAA-PS/wax composite presented a wide absorption band and showed the minimum value of RL reaching-39.4 dB when the thickness was 2.50mm.
Nano-structure polymer Flake carbonyl iron particles Surface modification Microwave absorption properties Dielectric properties
Zhenjiang Song Jianliang Xie Longjiang Deng Peiheng Zhou Haipeng Lu
State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054,People ”s Republic of China
国内会议
成都
英文
329-336
2013-11-15（万方平台首次上网日期，不代表论文的发表时间）