Abstract
Magnetic iron particle-doped expanded graphite was prepared by dipping, stirring and standing an expandable graphite for 5-8 h in ferrocene then expanding at 500°C. The surface morphology and composition of the expanded graphite were characterized by SEM and elemental analysis while the magnetization curves, magnetic susceptibility and the attenuation properties for an 8 mm wavelength electromagnetic signal were characterized by a vibration magnetometer. Results showed that ferric oxide was deposited on the surface of the expanded graphite. The average magnetic intensity of the expanded graphite prepared is higher than 8 emu/g under a magnetic field intensity of 0-7.958 × 105 A/m. The largest attenuation is over -10 dB and its mass extinction coefficient is over 1.0 g/m2 in the wave length of military radar, which is better than a current millimeter wave radar shielding material.
| Original language | English |
|---|---|
| Pages (from-to) | 24-29 |
| Number of pages | 6 |
| Journal | Xinxing Tan Cailiao/New Carbon Materials |
| Volume | 21 |
| Issue number | 1 |
| Publication status | Published - Mar 2006 |
Keywords
- Expanded graphite
- Interfere
- Magnetic
- Millimeter wave