| 摘要 |
<p>The present invention concerns a powder magnetic core for operating at hi gh frequencies obtained by pressure forming an iron-based magnetic powder co vered with an insulation film, and a specific resistance less than 1000, pre ferably less than 2000 and most preferably less than 3000 µm, a saturation m agnetic flux density B above 1.5, preferably above 1.7 and most preferably a bove 1.9 (T). The invention also concerns the preparation of such cores as w ell as a powder which is suitable for the preparation.</p> |
