Abstract
Small amounts of additives such as mol % 0.13 NiO and mol % 0.01 were added to Cu-Zn-Mg ferrites. Basic composition of the Cu-Zn-Mg ferrites was X/ / (group A) and (group B). Specimens were sintered at different temperatures (1010, 1030, ) for 2 hours in air followed by an air cooling. Then, effects of various composition and sintering temperatures on the microstructure and the magnetic properties such as inductions, coercive forces, and initial permeabilities of the Cu-Zn-Mg ferrites were investigated. The average grain size increased with the increase of sintering temperature. The magnetic properties obtained from the aforementioned Cu-Zn-Mg ferrite specimens were 1,724 gauss for the maximum induction, 1.0 oersted for the coercive force, and 802 for the initial permeability. These magnetic properties indicated that the specimens could be utilized as the core of IFT (intermediate frequency transformer) and antenna in the amplitude modulation.
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