Patent ID: 7754094
Filing Date: 2010-07-13
Classification: C04B,H01F

Abstract:
1. A sintered ferrite body having a main composition comprising 68-75% by mol of Fe 2 O 3 , and 3-12% by mol of ZnO, the balance being manganese oxide; R cal determined from the Fe 2 O 3 content X (% by mol) by the formula (1) of R cal =[200(X−50)]/(3X), and the ratio R (%) of Fe 2+ per the total amount of Fe in said sintered body meeting the condition of R cal −2.0≦R≦R cal +0.3; said sintered body having a density of 4.9 g/cm 3 or more; and said sintered ferrite body having a maximum magnetic flux density of 544 mT or more measured at 100° C. in a magnetic field of 1000 A/m.