Li–Zn ferrites with nonmagnetic additives

The authors investigated the effect of small additive amounts of non‐magnetic ions as Na 1+ , Ca 2+ , Zr 2+ , Sb 3+ and binary or ternary combinations of these ions on some physical properties of the (Li 0.5 Fe 0.5 ) 0.6 Zn 0.4 Fe 2 O 4 ferrite used in high frequency. It was found that by the segregation of these additives on the grain boundaries, the grain growth is diminished and much higher sintered densities are obtained in several cases, though not all. We established that additives such as Na 2 O, CaO, ZrO 2 enhance the rate of sintering, giving a speedy start to the sintering process. All additives improve the electrical resistivity due to insulating intergranular layers generated by segregation of additives.