[en] The effects of attrition milling cycle have been investigated on the change of powder characteristics, compaction behavior and sinterability of the mixed oxide powder[UO₂-5wt% CeO₂]. The apparent density of powder increased as the milling cycles increased. On the other hand, the particle size decreased as the milling cycles increased, but the decrease in particle size is saturated to about 04.μm above 6 cycles. In the case of 8 milling cycles, it appeared that the green density increased with compaction pressure, but the sintered density decreased. The size of grains is uniformly distributed as the milling cycle increased