Abstract
This study aims to densify sintered polycrystalline Mn-Zn ferrites, using O2-HIP treatment in Ar atmosphere containing 0.1 % O2. It is expected that this treatment enables to economize use of packing ferrite powders or annealing process as in Ar-HIP treatment. After HIP treatment of 49 MPa at 1200°C for 1 hr, the HIPed ferrite reaches almost theoretical density. Its permeability at 100 kHz decreases from 3600 to 2500, while the loss factor, tan δ/μ, decreases to less than half.
