FERRITE CORE AND ITS PRODUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a ferrite core which has a small standard deviation σ of magnetic characteristics such as initial magnetic permeability or DC superimposing characteristic and a small R expressing the difference between the best point and worst point of each characteristic as an index of dispersion and which has excellent magnetic characteristics, and to provide a method for producing the same.

SOLUTION: The method for producing the ferrite core includes a process for firing a formed body which consists of a ferrite raw material containing a Zn compound by using a firing jig made of ferrite containing an oxide of Zn. The difference (M2-M1) between the second molar ratio (M2; mol%) being the molar ratio of the content of the oxide of Zn in the firing tool to the total amount of the ferrite and the first molar ratio (M1; mol%) being the molar ratio of the content of the Zn compound in the formed body to the total amount of the ferrite raw material is set to be -5 mol%≤M2-M1≤5 mol% expressed in terms of ZnO.

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