Synthesis, dielectric and microwave absorption properties of flake carbonyl iron particles coated wi

• 作 者: Zhenjiang Song Jianliang Xie Longjiang Deng Peiheng Zhou Haipeng Lu
• 机 构: State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Scienc
• 出 处: 2013年全国博士生学术论坛——电子薄膜与集成器件
• 发表日期: 2013年7期
• 关键词: Nano-structure polymer Flake carbonyl iron particles Surface modification Microw

　　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.