| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1805209 | Journal of Magnetism and Magnetic Materials | 2007 | 4 Pages |
A new kind of a-Fe/ferrite composites with sandwich structure was realized by chemical reduction method, where the as-prepared W-type barium hexaferrite flake particles were subjected to a reduction treatment in hydrogen atmosphere at different temperatures. X-ray diffractometer reveals that a-Fe/Co particles precipitate in the ferrite matrix, when the reduction temperature is higher than 230 °C. With the temperature increased, the particles morphology changed into sandwich structure in hexagonal flake particles and the barium hexaferrite phase was decomposed gradually, when were completely decomposed at T=450 °C. Results show that the composites particles with sandwich structure (T=270 °C) have higher microwave complex permeability than the others.
