Transition of the Particle‐Growth Mechanism with Temperature Variation in the Molten‐Salt Method

In this study, changes in the amount of potassium chloride liquid phase used for the molten‐salt synthesis of strontium ferrite were examined to understand the transition of the growth mechanism with temperature. The results of this investigation indicate that an increase in reaction temperature from 900° to 1200°C caused the particle shapes to become nearly spherical. In addition, the particle size decreased as the relative amount of liquid increased. The growth process of the strontium ferrite particles in the molten salt appears to have undergone a transition from an interfacial, reaction‐controlled mechanism to a diffusion‐controlled mechanism as temperature is increased.