Erosion-resistant ceramic material, powder, slip and component
The use of magnesium oxide, reactive alumina and aluminium oxide as a base provides for a new erosion-resistant material upon sintering.
1. A powder comprising (in % by weight):
aluminum oxide in an amount of from 92.0% to <99.0%; and
spinel in a proportion of 8.0%-1.0%.
2. The powder as claimed in claim 1 , which contains γ′-aluminum oxide.
3. The powder as claimed in claim 1 , which contains α-alumina as aluminum oxide.
4. The powder as claimed in claim 1 , which contains tabular aluminas as aluminum oxide.
5. The powder as claimed in claim 1 , which contains reactive alumina as aluminum oxide as an additive for reducing a water content and for improving a processability in a ceramic slip, in a proportion of from 10% by weight to 25% by weight.
6. The powder as claimed in claim 4 , wherein the tabular alumina has at least three different particle size fractions.
7. The powder as claimed in claim 5 , wherein the reactive alumina has at least two different particle size fractions.
8. The powder as claimed in claim 4 , wherein the tabular aluminas have a maximum particle size of up to 10 mm.
9. The powder as claimed in claim 1 , which comprises no silicon oxide and/or no silicon compounds.
10. A slip comprising at least a liquid and a powder as claimed in claim 1 .