Effect of WO3 Addition on the Sintering and Magnetic Properties of NiCuZn Ferrites for Multilayer Chip Inductor

초록

The sintering behavior and magnetic properties of WO3-added NiCuZn ferrites, (Ni0.6Cu0.2Zn0.2O)1.02(Fe2O3)0.98 sintered at 900℃ in air, were studied. Q-factor as a function of frequency and μiQ measured at 1㎒ increased with the increase of WO3 additive content. Resonance frequency(fμ"max) shifted toward the higher frequency at WO3 additive content of 0.2 wt.%. When WO3 additive content was the above 0.8 wt.%, the peak width of the imaginary part of complex permeability, which has indicated the magnetic loss, became narrower. It was found that saturation magnetization and Q-factor measured at 1㎒ increased by the change of sintering condition.