Low temperature sintering of MgCuZn ferrite and its electrical and magnetic properties

摘要

The low temperature sintering of MgCuZn ferrite was investigated using the usual ceramic method. The effect of Cu substitution on the properties of MgZn ferrites was also investigated and it was found that the densification of MgCuZn ferrite is dependent upon Cu concentration. The sintered ferrite with a density of 4.93 g/cm~3 and electrical resistivity > 10~(11) OMEGA-cm was obtained for the ferrite with 12 mol percent Cu at relatively low sintering temperature (910 deg C). The magnetic properties of the ferrites also improved by the Cu substitution. The chip inductors made of the ferrite fired at 910 C with 12 mol percent Cu exhibited higher d.c. resistance. From these studies it is concluded that the good quality chip inductor inductor can be obtained using the MgCuZn ferrites.