| 摘要 |
PURPOSE:To enhance permeability without using filaments by a method wherein flake-like soft magnetic materials are bonded by bonding materials. CONSTITUTION:Flake-like soft magnetic materials such as pure iron powder of mean grain size 100mum, for example, are rolled by a roll to be converted from the spherical form to the disc-like form. The rolled disc-like pure iron is cleaned and then annealed in hydrogen gas at 800 deg.C for 1hr. This disc-like pure iron is weighed to become 50vol% and knealed with epoxy resin. Thereafter, it undergoes press forming under pressure of 1ton/cm<2>. Subsequently, it is cured at 150 deg.C for 2hr and then drawn out into the ring-like form. In this way, by using the flake-like soft magnetic materials, it becomes possible to enhance permeability without using expensive soft magnetic materials such as filaments. |
