Patent ID: 7731869

Claim:
A mixed oxide powder comprising particles comprising zirconium dioxide, aluminium oxide and at least a third component selected from the group consisting of yttrium oxide, magnesium oxide and calcium oxide, wherein the aluminium oxide content is 0.01 to 10 wt. % and is homogeneously distributed in the mixed oxide particles, the content of aluminium oxide, zirconium dioxide and yttrium oxide is at least 99.5 wt. %, based on the total quantity of the powder, the BET surface area is 20 to 80 m 2 /g, and wherein said mixed oxide powder contains tetragonal phase ZrO 2 and is free from amorphous components, and wherein said metal oxide powder has a C content of 0.015 wt % or less and a Cl content of 100 ppm or less.