Abstract
Magnetic ceramic hexagonal ferrites with strong magnetocrystalline anisotropy are considered for application in high frequency antennas. In particular, Ba3Co2Fe24O41 (Co2Z) is expected to exhibit a high permeability and low loss at frequencies >1GHz. In this paper, we report the fabrication of Co2Z material starting from precursor powders made by a modified-Pechini route. The precursor powders are compacted by dry pressing, followed by sintering to achieve a relative density of 90.3%. The morphology, crystal structure and high frequency magnetic permeability of thus formed materials are presented. The highest initial permeability, μ′=11.9, was achieved for the samples calcined/sintered at 1300/1330°C. It is expected that further improvement can be achieved by optimization of the sintered micro-structures.
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