Journal of Zhejiang University SCIENCE
(ISSN 1009-3095, Monthly)

2005   Vol. 6B   No. 6   p.580-583

Preparation of high-permeability NiCuZn ferrite

HU Jun, YAN Mi^†

(State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, China)
^†E-mail: mse_yanmi@dial.zju.edu.cn
Received Jan. 13, 2005; revision accepted Mar. 5, 2005

Abstract: Appropriate addition of CuO/V₂O₅ and the reduction of the granularity of the raw materials particle decrease the sintering temperature of NiZn ferrite from 1200 °C to 930 °C. Furthermore, the magnetic properties of the NiZn ferrite prepared at low temperature of 930 °C is superior to that of the NiZn ferrite prepared by sintering at high temperature of 1200 °C because the microstructure of the NiZn ferrite sintered at 930 °C is more uniform and compact than that of the NiZn ferrite sintered at 1200 °C. The high permeability of 1700 and relative loss coefficient tanδ/μ_i of 9.0×10⁻⁶ at 100 kHz was achieved in the (Ni_0.17Zn_0.63Cu_0.20)Fe_1.915O₄ ferrite.

Key words: NiZn ferrite, Low temperature, High permeability, Low loss
doi:10.1631/jzus.2005.B0580             CLC number: TG14