In the presented work, the values of the specific surface area of micron powders 2 ZrO -5 wt.% 2 3 Y O and powder compositions ( 2 ZrO -5 wt.% 2 3 Y O ) - 2 3 Al O obtained by precipitation nanostructured powders Al2O3 on micron powders 2 ZrO -5 wt.% 2 3 Y O are compared