Abstract
Strontium ferrite granules of powder particles having various fractional reactions were prepared by solid state reaction between 750° and 1250°C for 0.1 to 16h. Aggregate formation among particles was characterized by the die pressing test at 0 to 49MPa. At reaction temperatures below 1100°C, the strength of aggregates increased with reaction time and increasing temperature. At a given fractional reaction, the strength of aggregates did not depend on the reaction conditions. These results suggest that both aggregate formation and solid state reaction have the same temperature dependence. Above 1150°C, reaction was completed in a short time. Strength of granules increased as grain growth proceeded in the granule.
