Fundamental Studies on Ferrite Manufacturing Process (Part 6)

Effect of calcination and ball-milling on the sintering and magnetic properties of Ni⋅Zn ferrite

Abstract

The effects of powder processing conditions on the sintering of Ni.Zn ferrite have been . presented. The constituent oxide mixtures were calcined at temperatures between. 700 and. 1400°C, and then subjected to ball-milling up to 55 hours. Shrinkage, fired density and some magnetic properties were studied at different firing temperatures. It is shown that the. sintering behaviors, and hence the properties of sintered products could be interpreted adequately by powder parameters such as aggregation state of primary particle, size and its distribution. It is shown also that the effect of ball-milling is less significant unless the oxide mixtures are calcined above the recrystallization temperature.