Abstract
3D carbon/carbon (C/C) composite materials with different porosities and bulk densities were fabricated by repeated precursor infiltration and pyrolysis (PIP) process, and the electromagnetic interference shielding (EMI) effectiveness of C/C composites at 8.2-12.4 GHz (X band) with different porosities were studied. The results indicate that both EMI absorption shielding effectiveness and the total EMI shielding effectiveness of C/C composites could be improved by reducing the porosity appropriately. When the open porosity is 33.4%, the C/C composite material shows a maximum shielding effectiveness of 40 dB, and the EIM apsorption shielding effectiveness (30 dB) is much higher than EMI reflection shielding effectiveness (12 dB)). Porous C/C composite is one kind of excellent EMI shielding materials with high absorption and low reflection.
| Original language | English |
|---|---|
| Pages (from-to) | 59-64 |
| Number of pages | 6 |
| Journal | Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica |
| Volume | 29 |
| Issue number | 3 |
| State | Published - Jun 2012 |
Keywords
- C/C composite
- EMI shielding properties
- PIP process
- Porosity