Ceramic powder having an oxide and gadolinium mixed crystal pyrochlore phase, the ceramic layers and the layer system

摘要

The present invention and a good binding to the good thermal insulation properties and the substrate, thus providing a ceramic powder, the ceramic layer and the layer system with a long lifetime. A pyrochlore structure Gd _v (Zr _x Hf _y) O _z, especially pyrochlore structure Gd _v (Zr _x Hf _y) O _z only and, in particular 0.5 wt% to 10 wt% of the proportion of zirconium (Zr) and / or it will contain a secondary oxide of hafnium (Hf), sintered 0.05% by weight or less of silicon oxide as an auxiliary agent, 0.1 weight percent of calcium oxide, the following 0.1% magnesium oxide, 0.1% by weight or less of iron oxide, 0.1% by weight aluminum oxide and 0.08 wt% or less good ceramic powder may have a titanium oxide, in particular with these pyrochlore structure Hf and / or consists of a secondary oxide of Zr, may have a sintering aid, and ceramic powders. .BACKGROUND