| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing electromagnetic wave absorbent powder which has superior electromagnetic wave absorbing effect by using powder which is obtained by flattening the gas-atomized magnetic powder of an aspect ratio 2 or below and grain diameter 200 μm or smaller into powder of average s/t (ratio of sectional area to thickness of powder) 50 mm or larger. SOLUTION: Electromagnetic wave absorbent flattened powder size is of average s/t 50 mm or above. The electromagnetic wave absorbent flattened powder is formed of material powder having an aspect ratio of 2 or smaller. Furthermore, the major axis of flattened powder is 200 μm or smaller in length. The electromagnetic wave absorbent powder comprises of a material powder of Permalloy, Fe-Cr-Al, Fe-Cr-Si, Fe-Cr-Si-Al, or powder of 3 to 10 mass% Cr and remaining mass% Fe. |
