Patent ID: 7700034

Claim:
A slip comprising: a liquid phase; at least one aluminum oxide powder and at least one zirconium dioxide powder, wherein a) the at least one zirconium dioxide powder consists of zirconium dioxide powder which is not stabilized, comprises no or an insufficient amount of Y, Ca, Mg or titanium to produce a stabilizing effect, has a mean particle diameter of less than 300 nm, shows only a monoclinic phase and a tetragonal phase in the X-ray diffraction pattern, with the proportion of the tetragonal phase at room temperature being from 20 to 70%, and is present in a proportion of from 2 to 20% by weight, based on the total weight of the zirconium dioxide and the aluminum oxide, b) the aluminum 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 weight of the zirconium dioxide and the aluminum oxide amount of the slip, and c) the solids content, as the sum of aluminum oxide and zirconium dioxide, is from 50 to 85% by weight, based on the total amount of the slip.