Abstract
Sendust flakes (with 9.59% Si, 5.88% Al and balanced Fe) were coated with NiCuZn ferrite nanoparticles by using a simple sol-gel approach. Both the coated and uncoated flakes were characterized by using scanning electron microscopy, X-ray diffraction and vibrating sample magnetometer. Composites made from the Sendust flakes with the in-plane alignment were fabricated via a vacuum infiltration method. Microwave measurement results indicated that permittivity of the composite made of the coated Sendust flakes was remarkably reduced, with a slight decrease in permeability over 0.1-8.55 GHz. Consequently, the sample with a thickness of 6 mm showed reflection loss exceeding -20 dB at 1.4 GHz, while reflection loss of the composite derived from the uncoated Sendust flakes could not reach -10 dB at the same sample thickness. Therefore, the Sendust flakes coated with NiCuZn ferrite nanoparticles could be promising candidates to develop microwave attenuation materials.
Original language | English |
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Pages (from-to) | 232-236 |
Number of pages | 5 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 331 |
DOIs | |
State | Published - Apr 2013 |
Externally published | Yes |
Keywords
- Complex permeability
- Complex permittivity
- Microwave attenuation
- Sendust flake
- Sol-gel approach
- Vacuum infiltration method