Abstract
Conventional ceramic methods for pure oxide materials were applied to the processing of zinc ferrites; the composition of the starting materials was (1-y)ZnO+y alpha -Fe2O3. The ferrite was prepared by quenching into water from some 'soak temperature' T (1300 degrees C, 1400 degrees C), at which temperature it was presumed to be in equilibrium X-ray diffraction examination was used to measure the extent of solid solution formation by detecting the characteristic reflection of the various phases which have not entered into solid solution and by measuring the change in unit cell dimension of the spinel. When the parameter y mentioned above increased, zinc spinel existing at high temperature showed two types of change in its lattice constants. These changes were explained by applying the concept of normality lambda to the ZnO-Fe2O3 phase diagram.