Method for controlling resonance frequency of magnetron plan byte type hexagonal ferrite powder, wave absorber, and magnetron plan byte type hexagonal ferrite powder

摘要

The powder of magnetite pleiotropic hexagonal ferrite represented by equation (1)The compound powder of formula (2) andIncludingMagnetic field strength h which is 90% of the magnetization when an external magnetic field of 50 kOe is applied α が、19 kOe / m.leq. H α Magnetoplenary hexagonal ferrite powder satisfying. Leq. 28 kOeElectric wave absorberA method of controlling the resonant frequency of a magnetron plan byte type hexagonal ferrite powder.In formula (1), a represents at least one metal element selected from the group consisting of Sr, Ba, CA, and Pb, and X satisfies 1.5 ≦ x ≦ 8.0.In formula (2), AA represents at least one metal element selected from the group consisting of Sr, Ba, CA, and Pb.