Preparation and the electromagnetic interference shielding in the X-band of carbon foams with Ni-Zn ferrite additive

Heguang Liu, Jinsong Wu, Qiang Zhuang, Alei Dang, Tiehu Li*, Tingkai Zhao

*Corresponding author for this work

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

The composite of carbon foam with Ni-Zn ferrite as additive has been developed via foaming and carbonization process for electromagnetic interference shielding, using coal tar pitch as precursor and Ni-Zn ferrite as an additive. It was observed that the shielding effectiveness (SE) over the X-band frequency is enhanced along with the increase of Ni-Zn ferrite additive amount. The carbon foam with 15 wt% Ni-Zn ferrite shows a SE of 42 dB, which has a promising application prospect. The electromagnetic interference shielding mechanism of carbon foam with different amount of Ni-Zn ferrite additive is discussed in the work. An absorption-dominant mechanism, which is mainly associated with the magnetic property determined by the amount of Ni-Zn ferrite additive, has been revealed. It is also found that the mechanical strength of resultant carbon foams increases firstly and then decreases with the continuously increased amount of Ni-Zn ferrite additive.

Original languageEnglish (US)
Pages (from-to)3939-3946
Number of pages8
JournalJournal of the European Ceramic Society
Volume36
Issue number16
DOIs
StatePublished - Dec 1 2016

Keywords

  • Carbon foam
  • Electromagnetic interference shielding
  • Ni-Zn ferrite
  • X-band

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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