2004 年 124 巻 5 号 p. 407-413
It is found from simulation study that electromagnetic wave absorbers made of composites of Ni-Zn ferrite and SiO2 particles, which are mutually isolated each other in the continuous medium of Ni-Zn ferrite, show absorption in the frequency region both below and above 1GHz. The spray method is proposed to fabricate such composites in this study. The thin films of Ni-Zn ferrite can be coated on the surface of SiO2 particles by the spray thin film deposition method. It is confirmed by XRD and the electromagnetic characteristics measurement. The measured complex permeability approached to the calculated result using the isolation model of SiO2 particles in the Ni-Zn ferrite medium than using Lichtenecker’s logarithm mixed low.
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