Abstract
The W-type ferrites, BaMe 2 Fe 16O 27, were prepared by sol-gel method. The performances of the ferrites were improved by changing the Me 2(Co 2, CoNi, CoZn). The structures, morphologies, magnetic properties and microwave absorption properties of the samples were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), vibrating sample magnetometer (VSM) and Vector network analyzer. According the SEM observations, it is found that all the ferrites showed a hexagonal platelet-like shape. The XRD results indicated that all the samples were W-type ferrite. The synthesized samples exhibited paramagnetism and strong magnetism. Besides, the composite, which was blend with paraffin BaCoZnFe 16O 27/paraffin, has a better microwave absorbing property than the other ferrites. Moreover, the reflection loss of one-layer absorber with the BaCoZnFe 16O 27 sample was calculated. The band width (with respect to -10 dB reflection loss) is 5.42 GHz at a matching thickness of 3.50 mm and the maximal reflection loss is -16.23 dB.
| Original language | English |
|---|---|
| Pages (from-to) | 607-612 |
| Number of pages | 6 |
| Journal | Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research |
| Volume | 25 |
| Issue number | 6 |
| State | Published - Dec 2011 |
Keywords
- Electromagnetic properties
- Inorganic non-metallic materials
- Microwave absorbing property
- Sol-gel method
- W-type barium ferrite