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 language | English (US) |
|---|---|
| Pages (from-to) | 3939-3946 |
| Number of pages | 8 |
| Journal | Journal of the European Ceramic Society |
| Volume | 36 |
| Issue number | 16 |
| DOIs | |
| State | Published - Dec 1 2016 |
Funding
The work was supported by the National Natural Science Foundation of China (No. 51172184 ). Authors would like to thank Dr. Fuxue Yan, Dr. Li Lei and Dr. Yang Ren for the help with the SEM and XRD test.
Keywords
- Carbon foam
- Electromagnetic interference shielding
- Ni-Zn ferrite
- X-band
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry