The influence of the Synthesis Conditions of NiCuZn Ferrites on their Microscopic Homogeneity

Abstract

The present work investigates the influence of the synthesis conditions of specific ferrites (Ni0,30Cu0.07Zn0,63)Fe2O4, prepared with the mixed oxide process, on their microstructural homogeneity. Segregation was found inside the grains, in the form of clustering or compositional modulation. Both types of segregation, which are not observed in all grains or all samples, seem to be related to the stress of the material as well as the specific orientation of the individual grains, where the segregation appeared. The reason for this assumption, which will be discussed, is that after annealing, where stress relaxation takes place, the segregation completely disappeared.