Co_2Y-NiCuZn Ferrite Composites for High Frequency Applications

摘要

It is very important and urgent to develop a magnetic material that has a higher initial permeability and quality factor above 200-300 MHz for use in making high frequency inductors. This study produced a Co_2Y-NiCuZn ferrite composite with high permeability by coating NiCuZn ferrites onto the surface of Co_2Y ferrites using a heterogeneous nucleation process. The NiCuZn ferrites addition effects on the densification behavior, micro-structure and magnetic property of Co_2Y-NiCuZn ferrite composites were investigated. A NiCuZn ferrites coating onto the surface of Co_2Y ferrites can effectively enhance the densification and improve the magnetic property of Co_2Y ferrites. Co_2Y-NiCuZn ferrite composites sintered at 1200° show a sintered density of 5.34g/cm~3, high initial permeability of 4 and quality factor above 30 in the 300-600 MHz frequency, which can be used in inductors for high frequency applications.