NICUZN FERRITE MATERIAL WITH HIGH MAGNETIC CONDUCTIVITY

摘要

A NiCuZn ferrite material with high magnetic conductivity and the preparation method thereof. The ferrite material comprises Fe₂O₃, ZnO, CuO and NiO as main components, and auxiliary components. The main components comprise 47.5-49.8mol% of Fe₂O₃, 30-40mol% of ZnO, 5-15mol% of CuO, and balance of NiO. The auxiliary components comprise 0.15-0.85wt% of K₂CO₃, 0.03-0.25wt% of SiO₂ and 0.15-0.35wt% of WO₃ based on the total amount of the main components. By the addition of auxiliary components, the sintering temperature of the NiCuZn ferrite material with high magnetic conductivity is significantly lowered compared to the conventional way, and the material can be sintered at the temperature of 1000℃ below. On the one hand, not only the high-frequency electromagnetic properties of the material are significantly improved, but also the sintered density and mechanical strength are enhanced, and the higher magnetic conductivity is obtained, on the other hand energy is saved and production cost is reduced significantly. The NiCuZn ferrite material has a initial permeability of ≥3350 at 25℃, a loss coefficient of ＜3.5×10^-6 under the testing condition of 100kHz, 0.25mT, and a loss coefficient of ＜12.6×10^-6 under the testing condition of 500kHz, 0.25mT.