| abstract |
A ferrite powder capable of obtaining a predetermined attenuation in a predetermined frequency band when a radio wave absorbing sheet is manufactured, a manufacturing method thereof, and a radio wave absorbing sheet are provided. SOLUTION: When mixed ferrite powders in which two or more kinds of ferrite powders are mixed, each peak particle size is P, the largest peak particle size is P max , and the smallest peak particle size is P min. , P max / P min ≧ 1.5, and a radio wave absorber is produced from each of two or more types of ferrite powders constituting the mixed ferrite powder, and shows the maximum value of the imaginary part μ ″ of the complex permeability the frequency is f, of the frequency f of the two or more wave absorber, when the highest frequency is f max, the lowest frequency and f min, a f max / f min ≦ 1.3, respectively Among the maximum values of the imaginary part μ ″ of the complex permeability, the largest value is μ ″ max , and the smallest value is μ ″ min, and μ ″ max / μ ″ min ≦ 1.5 Provide some mixed ferrite powder. [Selection] Figure 1 |