| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferrite sintered body having high magnetic permeability and a high Curie temperature, and having a small rate of temperature change of magnetic permeability, and to provide a noise filter formed by winding a metal wire around the ferrite sintered body.SOLUTION: This ferrite sintered body contains ≥0.05 to 0.15 mass% Ti in terms of TiOwith respect to a 100 mass% main component having a composition range comprising ≥48 to ≤51 mol% Fe in terms of FeO, ≥29 to ≤31 mol% Zn in terms of ZnO and ≥14 to ≤17 mol% Ni in terms of NiO, and ≥5 to ≤7 mol% Cu in terms of CuO, wherein a Zn compound exists in a crystal grain boundary. Hereby, following properties can be achieved, namely, the magnetic permeability is ≥1,200, the Curie temperature is ≥159°C, and absolute values of each rate of temperature change of magnetic permeability Xand Xare ≤40. |
