Electroless plating preparation and electromagnetic properties of Co-coated carbonyl iron particles/polyimide composite

Yingying Zhou, Wancheng Zhou, Rong Li, Yuchang Qing, Fa Luo, Dongmei Zhu

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

To solve the serious electromagnetic interference problems at elevated temperature, one thin microwave-absorbing sheet employing Co-coated carbonyl iron particles and polyimide was prepared. The Co-coated carbonyl iron particles were successfully prepared using an electroless plating method. The microstructure, composition, phase and static magnetic properties of Co-coated carbonyl iron particles were characterized by combination of scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The electromagnetic parameters of Co-coated carbonyl iron particles/polyimide composite were measured in the frequency range of 2-18 GHz, and the electromagnetic loss mechanism of the material-obtained was discussed. The microwave absorption properties of composites before and after heat treatment at 300°C for 100 h were characterized in 2-18 GHz frequency range. It was established that composites based on Co-coated carbonyl iron demonstrate thermomagnetic stability, indicating that Co coating reduces the oxidation of carbonyl iron. Thus, Co-coated carbonyl iron particles/polyimide composites are useful in the design of microwave absorbers operating at temperatures up to 300°C.

Original languageEnglish
Pages (from-to)251-258
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Volume401
DOIs
StatePublished - 1 Mar 2016

Keywords

  • Antioxidation
  • Carbonyl iron particles
  • Co coating
  • Electroless plating
  • Electromagnetic properties

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