Abstract
The preparation of flaky Fe 2O 3-excess MnZn-ferrite particles is described. Flaky Fe 2O 3 powder obtained by hydrothermal synthesis was mixed with constituent oxides and heated in the presence of alkaline sulfate flux in a nitrogen atmosphere. Flaky ferrite particles ranging from 2 to 20 μm were obtained in K 2SO 4 flux at 1150°C. It is shown that a composite material consisting of flaky ferrite particles is characterized by lower natural resonance frequency than that of equiaxed particles, and is useful for absorptive electromagnetic shielding applications.
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