MnZn ferrite의 자기적 성질에 미치는 하소조건의 영향(2) = Effect of Calcining Conditions on the Magnetic Properties of MnZn Ferrite(2)

다국어 초록 (Multilingual Abstract)

In this study, preparing the specimens of MnZn ferrites with the chemical composition of zero magnetostriction and zero magnetic anisotropy, we investigated the effects of the calcining conditions on the magnetic properties of MnZn ferrites.
The results obtained from this study are as follows :
The saturation magnetization of sintered MnZn ferrites increases a little along with the calcining temperature, and the electrical resistivity of the ferrites increases with the calcining temperature to reach maximum value at about 900℃. The initial permeability, measured at 20℃, increases with the calcining temperature to reach maximum value at around 900℃, but successively decreases above 900℃. The coercive force decreases up to around 900℃, whereafter it successively increases with the calcining temperature. The power loss appears constant up to 900℃ with the calcining temperature, but abruptly increases above 900℃.
From the above results, the optimum calcining condition for MnZn ferrites is considered to be 900℃for 2 hours.