Thermal Insulation Materials Based on ZrO2–Y2O3–Yb2O3

Xerogels and powders in the ZrO2−Y2O3−Yb2O3 system are synthesized by coprecipitation of hydroxides in a laboratory setup and in a micro-vortex jet apparatus with counterswirling flows. The effects of the initial zirconium oxynitrate concentration and synthesis conditions on the physicochemical properties of the obtained materials are revealed. Ceramics based on t-ZrO2 are obtained, exhibiting high microhardness, elastic modulus, and coefficients of linear thermal expansion (CLTE), which makes them promising for use as thermal insulation materials.