| 摘要 |
PURPOSE:To improve the radio wave absorption characteristic by orientation- arranging a certain quantity of the magnetic metal alloy powder which possesses the magnetic loss and dielectric loss in a certain direction in an insulative body. CONSTITUTION:A certain quantity of magnetic metal alloy powder having a magnetic loss and dielectric loss is orientation-arranged in a certain direction in an insulative body. The magnetic metal alloy is, in concrete terms, the high permeability amorphous metal alloy such as Fe-Si-B group having an electric resistivity rho of 80muOMEGA-cm or more. The shape and dimension of the magnetic metal alloy exert the great influence to the magnetic loss and dielectric loss characteristic in the electric wave absorption, and the metal alloy having the large aspect ratio such as needle shape, fiber shape, or flake shape is preferable, and the magnetic metal alloy having an aspect ratio of 50 or more is used. In the case of the excessively large aspect ratio, the insulation between powders is hardly maintained in compounding a desired quantity of magnetic metal alloy powders in the insulation body. |
