Slip Containing Zirconium Dioxide and Aluminum Oxide and Shaped Body Obtainable Therefrom
AssigneeEvonik Degussa GmbH
InventorsMonika Oswald, Klaus Deller, Wolfgang Kollenberg, Dieter Nikolay
Life of this patent
Estimating the term…
Loading patent…
AssigneeEvonik Degussa GmbH
InventorsMonika Oswald, Klaus Deller, Wolfgang Kollenberg, Dieter Nikolay
Estimating the term…
Slip containing at least one aluminium oxide powder and at least one unstabilized zirconium dioxide powder, wherein a) the zirconium dioxide powder i) has a mean particle diameter of less than 300 nm, ii) shows only the monoclinic phase and the tetragonal phase in the X-ray diffraction pattern, with the proportion of tetragonal phase at room temperature being from 20 to 70%, and iii) is present in a proportion of from 2 to 20% by weight, based on the total amount of the slip, b) the aluminium oxide powder i) has a mean particle diameter of more than 300 nm and ii) is present in a proportion of from 80 to 98% by weight, based on the total amount of the slip, and c) the solids content, as the sum of aluminium oxide and zirconium dioxide, is from 50 to 85% by weight, based on the total amount of the slip.
A slip containing at least one aluminium oxide powder and at least one unstabilized zirconium dioxide powder, characterized in that
11-15. (canceled)
A shaped body comprising aluminum oxide and zirconium dioxide and having a zirconium dioxide content of from 2 to 20% by weight, characterized in that the zirconium oxide is homogeneously distributed in the shaped body, and shows tetragonal and monoclinic crystallites in the x-ray diffraction pattern, with the proportion of tetragonal phase being from 20 to 70%, wherein the size of the monoclinic crystallites is from 20 to 40 nm, and the size of the tetragonal crystallites is from 30 to 50 nm.
Dependencies are inferred from the claim text.