FERRITE MATERIAL AND INDUCTOR

摘要

PROBLEM TO BE SOLVED: To provide a ferrite material having a high Q value and also having a small absolute value of αμir (alphamuir) in a wide temperature range between -40°C to 160°C.

SOLUTION: A ferrite material comprises, as main constituents, 45.5-48 mol % of Fe2O3, 5-10.5 mol % of CuO, 26-30 mol % of ZnO, and the balance substantially being NiO, and further comprises, as an additive, cobalt oxide within a range between 0.005 and 0.045 wt % in terms of CoO. The ferrite material invention has properties that each of the absolute value of αμir(-40)-20and the absolute value of αμir20-160is ≤3 ppm/°C and a Q value at 100 kHz is ≥170.

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