부산대학교 도서관

Spinel ferrite flakes are prepared for use as fillers in electromagnetic (EM) composites. EM attenuation composites with the flaky fillers exhibit greatly enhanced high-frequency magnetic properties and attenuation properties. The complex permeability, $\mu_{r,0}^{\prime}$ and $\mu_{r,{\rm max}}^{\prime\prime}$, is enhanced by above 300%, and the relative attenuation bandwidth $W_{p}$ is increased by 40%, as compared to those for composites with conventional spherical fillers. $W_{p}$ achieves 80% of the theoretical maximum relative bandwidth. The composites with the flaky fillers are powerful and potential candidates as EM attenuation materials with broad bandwidth at microwave frequency.