Abstract: | Measurement of the divalent iron content in acid dissolved MnZn ferrites, fired in controlled atmospheres at various temperatures and quenched, allows calculation of cation vacancy contents. Addition of Ti4+ to these ferrites resulted in the introduction of vacancies at the rate of about 0 to 0.3 per Ti4+ depending on heat treatment conditions. Data are presented whereby the vacancy content with Ti4+ can be calculated based on the oxygen content of the undoped ferrite as available in the literature. Ti4+ stabilizes the hexagonal hematite-like structure and the phase boundary is presented as a function of Ti4+ and temperature. The vacancy contents at the phase boundary in Ti4+-doped ferrite as a function of temperature are in agreement with those calculated from the literature for undoped MnZn ferrites. Finally, the total oxygen content of coexisting spinel and hexagonal phases is presented. |