Patent ID: 6752932
Filing Date: 2004-06-22
Classification: C04B,H01F

Abstract:
A ferrite core containing 55 to 59 mol % of iron oxide calculated in terms of Fe2O3, more than 0 to 15 mol % of zinc oxide calculated in terms of ZnO, 2 to 10 mol % of nickel oxide calculated in terms of NiO, and the balance of manganese oxide (MnO) as its main components, whereinwhen the main components has a composition represented by the formula: (Zn2+a, Ni2+b, Mn2+c, Mn3+d, Fe2+e, Fe3+f)O4+&dgr;â€ƒâ€ƒ(1) wherein a, b, c, d, e and f meet the relations:a+b+c+d+e+f=3, and &dgr;=a+b+c+(3/2)d+e+(3/2)fâˆ’4 the value of &dgr; in formula (1) is such that:0âˆ’3.