Influence of oxygen partial pressure during sintering on the power loss of MnZn ferrites

The effect of low oxygen partial pressure during sintering on the power loss of high-frequency power supplies based on MnZn ferrites was studied. The investigation revealed that a lower concentration of oxygen in the sintering atmosphere modifies the ferrite microstructure and its magnetic properties. The results show that the combined effect of the increase of the Fe/sup 2+/ concentrations in the spinel lattice and the decrease of the average grain size improve the performance of power ferrites.