Abstract
In this study, we investigated magnetic Properties of N $i_{0.2-x}$C $u_{x}$Z $n_{0.305}$F $e_{0.495}$ (x=0 ~0.2) ferrites. As the increased, the density and shrinkage increased until 5.3g/㎤, 20% respects, but the absorption decreased rate until 0.01%. As a results of the density, absorption rate, and shrinkage rate, the grain growth progressed rapidly in x=0.125 at 105$0^{\circ}C$, x=0.075 at 115$0^{\circ}C$, and x=0.025 at 115$0^{\circ}C$ for 3hours. As the CuO concentration increased, initial permeability increased at sintered 105$0^{\circ}C$ and 115$0^{\circ}C$ for 3 hours, but decreased at 125$0^{\circ}C$ for 3 hoers. The complex permeability as a function of frequency were high values at sintered 105$0^{\circ}C$ for 3 hours in x=0.005, 0.075.5.5.5.
